HistoryNet.com RSS
ArmchairGeneral.com RSS

HistoryNet.com Articles
America's Civil War
American History
Aviation History
British Heritage
Civil War Times
MHQ
Military History
Vietnam
Wild West
World War II

ACG Online
ACG Magazine
Stuff We Like
War College
History News
Tactics 101
Carlo D'Este
Books

ACG Gaming
Boardgames
PC Game Reviews

ACG Network
Contact Us
Our Newsletter
Meet Our Staff
Advertise With Us

Sites We Support
HistoryNet.com
Once A Marine
The Art of Battle
Game Squad
Mil. History Podcast
Russian Army - WW2
Achtung Panzer!
Mil History Online

Go Back   Armchair General and HistoryNet >> The Best Forums in History > History Library > Research, Reference and Historical Study > Science

Notices and Announcements

Science Discussions about hard science.

Reply
 
Thread Tools Display Modes
  #946  
Old 19 Mar 12, 19:23
Torien's Avatar
Torien Torien is offline
General of the Forums
United_States
Distinguished Service Award 5 Year Service Ribbon 100 Greatest Generals, 2008 Most Decisive Battle Campaign, 2008 
SPQR Campaign Greatest Westerns Campaign Greatest Spy Movies Campaign Greatest Blunders Campaign 
Best Pin-Up Of World War II 
 
Join Date: Jan 2008
Location: North Canton, Ohio
Posts: 13,751
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]

Sunspot Group 1429 and the Distant Sun
Image Credit & Copyright: Juan Manuel Pérez Rayego Explanation: What's that on the Sun? Over the past two weeks, one of the most energetic sunspot regions of recent years crossed the face of the Sun. Active Region 1429, visible above as the group of dark spots on the Sun's upper right, blasted out several solar flares and coronal mass ejections since coming around the edge of the Sun almost a month ago. Fast moving particles from these solar explosions have impacted the Earth and been responsible for many colorful auroras seen over the past two weeks. The picturesque foreground features trees and birds near Merida, Spain, where the above image was taken about a week ago. Although AR 1429 has continued to rotate to the right and gone around the limb of the Sun -- as seen from the Earth -- monitoring of the region will be continued by one of the STEREO satellites, however, which is orbiting the Sun well ahead of the Earth.
__________________
History is the version of past events that people have decided to agree upon. Napoleon Bonaparte
_________
BoRG
__________
"I am Arthur, King of the Britons!"
Reply With Quote
  #947  
Old 23 Mar 12, 18:09
Torien's Avatar
Torien Torien is offline
General of the Forums
United_States
Distinguished Service Award 5 Year Service Ribbon 100 Greatest Generals, 2008 Most Decisive Battle Campaign, 2008 
SPQR Campaign Greatest Westerns Campaign Greatest Spy Movies Campaign Greatest Blunders Campaign 
Best Pin-Up Of World War II 
 
Join Date: Jan 2008
Location: North Canton, Ohio
Posts: 13,751
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]

Messier 9 Close-up
Credit: ESA/Hubble, NASA Explanation: Renown 18th century astronomer Charles Messier described this 9th entry in his famous astronomical catalog as "Nebula, without star, in the right leg of Ophiuchus ...". But Messier 9 (M9) does have stars, known to modern astronomers as a globular cluster of over 300,000 stars within a diameter of about 90 light-years. It lies some 25,000 light-years distant, near the central bulge of our Milky Way galaxy. This Hubble Space Telescope close-up resolves the dense swarm of stars across the cluster's central 25 light-years. At least twice the age of the Sun and deficient in heavy elements, the cluster stars have colors corresponding to their temperatures, redder stars are cooler, bluer stars are hotter. Many of the cluster's cool red giant stars show a yellowish tint in the sharp Hubble view.
__________________
History is the version of past events that people have decided to agree upon. Napoleon Bonaparte
_________
BoRG
__________
"I am Arthur, King of the Britons!"
Reply With Quote
  #948  
Old 24 Mar 12, 10:33
Torien's Avatar
Torien Torien is offline
General of the Forums
United_States
Distinguished Service Award 5 Year Service Ribbon 100 Greatest Generals, 2008 Most Decisive Battle Campaign, 2008 
SPQR Campaign Greatest Westerns Campaign Greatest Spy Movies Campaign Greatest Blunders Campaign 
Best Pin-Up Of World War II 
 
Join Date: Jan 2008
Location: North Canton, Ohio
Posts: 13,751
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]

The New Moon in the Old Moon's Arms
Image Credit & Copyright: M. Taha Ghouchkanlu Explanation: Also known as the Moon's ashen glow, Earthshine is Earthlight illuminating the Moon's night side. Taken on Nowruz, the March 20 equinox, from Esfahan, Iran, planet Earth, this telescopic image captures strong Earthshine from an old Moon. The darker earthlit disk is in the arms of a bright sunlit crescent. But the view from the Moon would have been enchanting too. When the Moon appears in Earth's sky as a slender crescent, a dazzlingly bright, nearly full Earth would be seen from the lunar surface. The Earth's brightness due to reflected sunlight is known to be strongly influenced by cloud cover. Still, a description of Earthshine, in terms of sunlight reflected by Earth's oceans in turn illuminating the Moon's dark surface, was written 500 years ago by Leonardo da Vinci.
__________________
History is the version of past events that people have decided to agree upon. Napoleon Bonaparte
_________
BoRG
__________
"I am Arthur, King of the Britons!"
Reply With Quote
  #949  
Old 25 Mar 12, 09:25
Torien's Avatar
Torien Torien is offline
General of the Forums
United_States
Distinguished Service Award 5 Year Service Ribbon 100 Greatest Generals, 2008 Most Decisive Battle Campaign, 2008 
SPQR Campaign Greatest Westerns Campaign Greatest Spy Movies Campaign Greatest Blunders Campaign 
Best Pin-Up Of World War II 
 
Join Date: Jan 2008
Location: North Canton, Ohio
Posts: 13,751
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]

Barred Spiral Galaxy NGC 1300
Image Credit: Hubble Heritage Team, ESA, NASA Explanation: Big, beautiful, barred spiral galaxy NGC 1300 lies some 70 million light-years away on the banks of the constellation Eridanus. This Hubble Space Telescope composite view of the gorgeous island universe is one of the largest Hubble images ever made of a complete galaxy. NGC 1300 spans over 100,000 light-years and the Hubble image reveals striking details of the galaxy's dominant central bar and majestic spiral arms. In fact, on close inspection the nucleus of this classic barred spiral itself shows a remarkable region of spiral structure about 3,000 light-years across. Unlike other spiral galaxies, including our own Milky Way, NGC 1300 is not presently known to have a massive central black hole.
__________________
History is the version of past events that people have decided to agree upon. Napoleon Bonaparte
_________
BoRG
__________
"I am Arthur, King of the Britons!"
Reply With Quote
  #950  
Old 26 Mar 12, 18:46
Torien's Avatar
Torien Torien is offline
General of the Forums
United_States
Distinguished Service Award 5 Year Service Ribbon 100 Greatest Generals, 2008 Most Decisive Battle Campaign, 2008 
SPQR Campaign Greatest Westerns Campaign Greatest Spy Movies Campaign Greatest Blunders Campaign 
Best Pin-Up Of World War II 
 
Join Date: Jan 2008
Location: North Canton, Ohio
Posts: 13,751
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]

M82: Galaxy with a Supergalactic Wind
Image Credit: NASA, ESA, The Hubble Heritage Team, (STScI/AURA)
Acknowledgement: M. Mountain (STScI), P. Puxley (NSF), J. Gallagher (U. Wisconsin) Explanation: What's lighting up the Cigar Galaxy? M82, as this irregular galaxy is also known, was stirred up by a recent pass near large spiral galaxy M81. This doesn't fully explain the source of the red-glowing outwardly expanding gas, however. Recent evidence indicates that this gas is being driven out by the combined emerging particle winds of many stars, together creating a galactic superwind.. The above photographic mosaic highlights a specific color of red light strongly emitted by ionized hydrogen gas, showing detailed filaments of this gas. The filaments extend for over 10,000 light years. The 12-million light-year distant Cigar Galaxy is the brightest galaxy in the sky in infrared light, and can be seen in visible light with a small telescope towards the constellation of the Great Bear (Ursa Major).
__________________
History is the version of past events that people have decided to agree upon. Napoleon Bonaparte
_________
BoRG
__________
"I am Arthur, King of the Britons!"
Reply With Quote
Sponsored Links

  #951  
Old 29 Mar 12, 18:48
Torien's Avatar
Torien Torien is offline
General of the Forums
United_States
Distinguished Service Award 5 Year Service Ribbon 100 Greatest Generals, 2008 Most Decisive Battle Campaign, 2008 
SPQR Campaign Greatest Westerns Campaign Greatest Spy Movies Campaign Greatest Blunders Campaign 
Best Pin-Up Of World War II 
 
Join Date: Jan 2008
Location: North Canton, Ohio
Posts: 13,751
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]

Rocket Trails in the Milky Way
Image Credit & Copyright: Jerry Lodriguss (Catching the Light) Explanation: On March 27, five sounding rockets leapt into early morning skies from NASA's Wallops Flight Facility in Virginia. Part of the Anomalous Transport Rocket EXperiment (ATREX), begining at 4:58 am EDT the rockets launched consecutively at 80 second intervals. Releasing a chemical tracer they created luminous white clouds within Earth's ionosphere at altitudes above 60 to 65 miles, swept along by the poorly understood high-altitude jet stream. (Not the same jet stream that airliners fly through at altitudes of 5 to 6 miles.) Seen along the mid-atlantic region of the United States, the clouds drifted through starry skies, captured in this clear photograph from East Point, New Jersey. Looking south toward the launch site, the tantalizing celestial background includes the stars of Sagittarius, Scorpius, and the more permanent faint, white, luminous clouds of the Milky Way.
__________________
History is the version of past events that people have decided to agree upon. Napoleon Bonaparte
_________
BoRG
__________
"I am Arthur, King of the Britons!"
Reply With Quote
  #952  
Old 05 Apr 12, 18:56
Torien's Avatar
Torien Torien is offline
General of the Forums
United_States
Distinguished Service Award 5 Year Service Ribbon 100 Greatest Generals, 2008 Most Decisive Battle Campaign, 2008 
SPQR Campaign Greatest Westerns Campaign Greatest Spy Movies Campaign Greatest Blunders Campaign 
Best Pin-Up Of World War II 
 
Join Date: Jan 2008
Location: North Canton, Ohio
Posts: 13,751
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]

Centaurus A
Image Credit & Copyright: SSRO-South (Steve Mazlin, Jack Harvey, Daniel Verschatse, Rick Gilbert)
and Kevin Ivarsen (PROMPT / CTIO / UNC) Explanation: What's the closest active galaxy to planet Earth? That would be Centaurus A, only 11 million light-years distant. Spanning over 60,000 light-years, the peculiar elliptical galaxy is also known as NGC 5128. Forged in a collision of two otherwise normal galaxies, Centaurus A's fantastic jumble of young blue star clusters, pinkish star forming regions, and imposing dark dust lanes are seen here in remarkable detail. The colorful galaxy portrait was recorded under clear Chilean skies at the Cerro Tololo Inter-American Observatory. Near the galaxy's center, left over cosmic debris is steadily being consumed by a central black hole with a billion times the mass of the Sun. As in other active galaxies, that process likely generates the radio, X-ray, and gamma-ray energy radiated by Centaurus A.
__________________
History is the version of past events that people have decided to agree upon. Napoleon Bonaparte
_________
BoRG
__________
"I am Arthur, King of the Britons!"
Reply With Quote
  #953  
Old 06 Apr 12, 09:43
Torien's Avatar
Torien Torien is offline
General of the Forums
United_States
Distinguished Service Award 5 Year Service Ribbon 100 Greatest Generals, 2008 Most Decisive Battle Campaign, 2008 
SPQR Campaign Greatest Westerns Campaign Greatest Spy Movies Campaign Greatest Blunders Campaign 
Best Pin-Up Of World War II 
 
Join Date: Jan 2008
Location: North Canton, Ohio
Posts: 13,751
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]

Venus and the Sisters
Image Credit & Copyright: Fred Espenak (Bifrost Astronomical Observatory) Explanation: After wandering about as far from the Sun on the sky as Venus can get, the brilliant evening star crossed paths with the Pleiades star cluster earlier this week. The beautiful conjunction was enjoyed by skygazers around the world. Taken on April 2, this celestial group photo captures the view from Portal, Arizona, USA. Also known as the Seven Sisters, even the brighter naked-eye Pleiades stars are seen to be much fainter than Venus. And while Venus and the sisters do look star-crossed, their spiky appearance is the diffraction pattern caused by multiple leaves in the aperture of the telephoto lens. The last similar conjunction of Venus and Pleiades occurred nearly 8 years ago. As it did then, Venus will again move on to cross paths with the disk of the Sun in June.
__________________
History is the version of past events that people have decided to agree upon. Napoleon Bonaparte
_________
BoRG
__________
"I am Arthur, King of the Britons!"
Reply With Quote
  #954  
Old 08 Apr 12, 09:23
Torien's Avatar
Torien Torien is offline
General of the Forums
United_States
Distinguished Service Award 5 Year Service Ribbon 100 Greatest Generals, 2008 Most Decisive Battle Campaign, 2008 
SPQR Campaign Greatest Westerns Campaign Greatest Spy Movies Campaign Greatest Blunders Campaign 
Best Pin-Up Of World War II 
 
Join Date: Jan 2008
Location: North Canton, Ohio
Posts: 13,751
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]

Io: Moon Over Jupiter
Image Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA Explanation: How big is Jupiter's moon Io? The most volcanic body in the Solar System, Io (usually pronounced "EYE-oh") is 3,600 kilometers in diameter, about the size of planet Earth's single large natural satellite. Gliding past Jupiter at the turn of the millennium, the Cassini spacecraft captured this awe inspiring view of active Io with the largest gas giant as a backdrop, offering a stunning demonstration of the ruling planet's relative size. Although in the above picture Io appears to be located just in front of the swirling Jovian clouds, Io hurtles around its orbit once every 42 hours at a distance of 420,000 kilometers or so from the center of Jupiter. That puts Io nearly 350,000 kilometers above Jupiter's cloud tops, roughly equivalent to the distance between Earth and Moon. The Cassini spacecraft itself was about 10 million kilometers from Jupiter when recording the image data.
__________________
History is the version of past events that people have decided to agree upon. Napoleon Bonaparte
_________
BoRG
__________
"I am Arthur, King of the Britons!"
Reply With Quote
  #955  
Old 10 Apr 12, 19:08
Torien's Avatar
Torien Torien is offline
General of the Forums
United_States
Distinguished Service Award 5 Year Service Ribbon 100 Greatest Generals, 2008 Most Decisive Battle Campaign, 2008 
SPQR Campaign Greatest Westerns Campaign Greatest Spy Movies Campaign Greatest Blunders Campaign 
Best Pin-Up Of World War II 
 
Join Date: Jan 2008
Location: North Canton, Ohio
Posts: 13,751
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]

A Fox Fur, a Unicorn, and a Christmas Tree
Image Credit: Rolf Geissinger Explanation: What do the following things have in common: a cone, the fur of a fox, and a Christmas tree? Answer: they all occur in the constellation of the unicorn (Monoceros). Pictured above as a star forming region cataloged as NGC 2264, the complex jumble of cosmic gas and dust is about 2,700 light-years distant and mixes reddish emission nebulae excited by energetic light from newborn stars with dark interstellar dust clouds. Where the otherwise obscuring dust clouds lie close to the hot, young stars they also reflect starlight, forming blue reflection nebulae. The above image spans about 3/4 degree or nearly 1.5 full moons, covering 40 light-years at the distance of NGC 2264. Its cast of cosmic characters includes the Fox Fur Nebula, whose convoluted pelt lies below center, bright variable star S Mon immersed in the blue-tinted haze, and the Cone Nebula near the tree's top. Of course, the stars of NGC 2264 are also known as the Christmas Tree star cluster. The triangular tree shape traced by the stars appears sideways here, with its apex at the Cone Nebula and its broader base centered near S Mon.
__________________
History is the version of past events that people have decided to agree upon. Napoleon Bonaparte
_________
BoRG
__________
"I am Arthur, King of the Britons!"
Reply With Quote
  #956  
Old 11 Apr 12, 08:36
Torien's Avatar
Torien Torien is offline
General of the Forums
United_States
Distinguished Service Award 5 Year Service Ribbon 100 Greatest Generals, 2008 Most Decisive Battle Campaign, 2008 
SPQR Campaign Greatest Westerns Campaign Greatest Spy Movies Campaign Greatest Blunders Campaign 
Best Pin-Up Of World War II 
 
Join Date: Jan 2008
Location: North Canton, Ohio
Posts: 13,751
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]

M46 & M47: Star Clusters Young and Old
Image Credit & Copyright: Sergio Eguivar (Buenos Aires Skies) Explanation: Many stars form in clusters. Galactic or open star clusters are relatively young swarms of bright stars born together near the plane of our Milky Way Galaxy. Separated by about a degree on the sky, two nice examples are M46 (upper left) 5,400 light-years in the distance and M47 (lower right) only 1,600 light-years away toward the nautical constellation Puppis. Around 300 million years young M46 contains a few hundred stars in a region about 30 light-years across. Aged 80 million years, M47 is a smaller but looser cluster of about 50 stars spanning 10 light-years. But this portrait of stellar youth also contains an ancient interloper. The small, colorful patch of glowing gas in M46 is actually the planetary nebula NGC 2438 - the final phase in the life of a sun-like star billions of years old. NGC 2438 is estimated to be only 3,000 light-years distant and likely represents a foreground object, only by chance appearing along our line of sight to youthful M46.
__________________
History is the version of past events that people have decided to agree upon. Napoleon Bonaparte
_________
BoRG
__________
"I am Arthur, King of the Britons!"
Reply With Quote
  #957  
Old 13 Apr 12, 19:00
Torien's Avatar
Torien Torien is offline
General of the Forums
United_States
Distinguished Service Award 5 Year Service Ribbon 100 Greatest Generals, 2008 Most Decisive Battle Campaign, 2008 
SPQR Campaign Greatest Westerns Campaign Greatest Spy Movies Campaign Greatest Blunders Campaign 
Best Pin-Up Of World War II 
 
Join Date: Jan 2008
Location: North Canton, Ohio
Posts: 13,751
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]

Yuri's Planet
Image Credit: ISS Expedition 30, NASA Explanation: On another April 12th, in 1961, Soviet cosmonaut Yuri Alexseyevich Gagarin became the first human to see planet Earth from space. Commenting on his view from orbit he reported, "The sky is very dark; the Earth is bluish. Everything is seen very clearly". To celebrate, consider this recent image from the orbiting International Space Station. A stunning view of the planet at night from an altitude of 240 miles, it was recorded on March 28. The lights of Moscow, Russia are near picture center and one of the station's solar panel arrays is on the left. Aurora and the glare of sunlight lie along the planet's gently curving horizon. Stars above the horizon include the compact Pleiades star cluster, immersed in the auroral glow.
__________________
History is the version of past events that people have decided to agree upon. Napoleon Bonaparte
_________
BoRG
__________
"I am Arthur, King of the Britons!"
Reply With Quote
  #958  
Old 16 Apr 12, 00:29
Torien's Avatar
Torien Torien is offline
General of the Forums
United_States
Distinguished Service Award 5 Year Service Ribbon 100 Greatest Generals, 2008 Most Decisive Battle Campaign, 2008 
SPQR Campaign Greatest Westerns Campaign Greatest Spy Movies Campaign Greatest Blunders Campaign 
Best Pin-Up Of World War II 
 
Join Date: Jan 2008
Location: North Canton, Ohio
Posts: 13,751
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]

The Eagle Nebula from Kitt Peak
Image Credit: T. A. Rector & B. A. Wolpa, NOAO, AURA Explanation: From afar, the whole thing looks like an Eagle. A closer look at the Eagle Nebula, however, shows the bright region is actually a window into the center of a larger dark shell of dust. Through this window, a brightly-lit workshop appears where a whole open cluster of stars is being formed. In this cavity tall pillars and round globules of dark dust and cold molecular gas remain where stars are still forming. Already visible are several young bright blue stars whose light and winds are burning away and pushing back the remaining filaments and walls of gas and dust. The Eagle emission nebula, tagged M16, lies about 6500 light years away, spans about 20 light-years, and is visible with binoculars toward the constellation of the Serpent (Serpens). This picture combines three specific emitted colors and was taken with the 0.9-meter telescope on Kitt Peak, Arizona, USA.
__________________
History is the version of past events that people have decided to agree upon. Napoleon Bonaparte
_________
BoRG
__________
"I am Arthur, King of the Britons!"
Reply With Quote
  #959  
Old 17 Apr 12, 18:38
Torien's Avatar
Torien Torien is offline
General of the Forums
United_States
Distinguished Service Award 5 Year Service Ribbon 100 Greatest Generals, 2008 Most Decisive Battle Campaign, 2008 
SPQR Campaign Greatest Westerns Campaign Greatest Spy Movies Campaign Greatest Blunders Campaign 
Best Pin-Up Of World War II 
 
Join Date: Jan 2008
Location: North Canton, Ohio
Posts: 13,751
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]

Antares and Clouds
Image Credit & Copyright: Ivan Eder Explanation: Antares is a huge star. In a class called red supergiant, Antares is about 850 times the diameter of our own Sun, 15 times more massive, and 10,000 times brighter. Antares is the brightest star in the constellation of Scorpius and one of the brighter stars in all the night sky. Located about 550 light years away, Antares is seen on the left surrounded by a yellowish nebula of gas which it has itself expelled. Radiation from Antares' blue stellar companion helps cause the nebular gas to glow. Far behind Antares, to the lower right in the above image, is the globular star cloud M4, while the bright star on the far right is Al Niyat.
__________________
History is the version of past events that people have decided to agree upon. Napoleon Bonaparte
_________
BoRG
__________
"I am Arthur, King of the Britons!"
Reply With Quote
  #960  
Old 20 Apr 12, 17:19
Torien's Avatar
Torien Torien is offline
General of the Forums
United_States
Distinguished Service Award 5 Year Service Ribbon 100 Greatest Generals, 2008 Most Decisive Battle Campaign, 2008 
SPQR Campaign Greatest Westerns Campaign Greatest Spy Movies Campaign Greatest Blunders Campaign 
Best Pin-Up Of World War II 
 
Join Date: Jan 2008
Location: North Canton, Ohio
Posts: 13,751
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]
Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+] Torien has achieved enlightenment [1200+]

M57: The Ring Nebula
Credit: Composite Image Data - Subaru Telescope (NAOJ), Hubble Legacy Archive;
Processing and additional imaging - Robert Gendler Explanation: Except for the rings of Saturn, the Ring Nebula (M57) is probably the most famous celestial band. Its classic appearance is understood to be due to perspective - our view from planet Earth looks down the center of a roughly barrel-shaped cloud of glowing gas. But expansive looping structures are seen to extend far beyond the Ring Nebula's familiar central regions in this intriguing composite of ground based and Hubble Space Telescope images with narrowband image data from Subaru. Of course, in this well-studied example of a planetary nebula, the glowing material does not come from planets. Instead, the gaseous shroud represents outer layers expelled from the dying, once sun-like star at the nebula's center. Intense ultraviolet light from the hot central star ionizes atoms in the gas. Ionized oxygen atoms produce the characteristic greenish glow and ionized hydrogen the prominent red emission. The central ring of the Ring Nebula is about one light-year across and 2,000 light-years away. To accompany tonight's shooting stars it shines in the northern constellation Lyra.
__________________
History is the version of past events that people have decided to agree upon. Napoleon Bonaparte
_________
BoRG
__________
"I am Arthur, King of the Britons!"
Reply With Quote
Sponsored Links

Reply

Please bookmark this thread if you enjoyed it!


Thread Tools
Display Modes



Forum Jump

All times are GMT -4. The time now is 21:04.
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2014, vBulletin Solutions, Inc.