News tagged with stellar explosions
Variability of type 1a supernovae has implications for dark energy studies
Aug 12, 2009 |
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(PhysOrg.com) -- The stellar explosions known as type 1a supernovae have long been used as "standard candles," their uniform brightness giving astronomers a way to measure cosmic distances and the expansion ...
Understanding stellar explosions is less straightforward than previously thought
Apr 30, 2009 |
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(PhysOrg.com) -- Stellar explosions called novæ are caused by nuclear reactions between the star's atoms. In order to better understand such violent phenomena, astrophysicists study the radiation emitted by certain types ...
Star Light, Star Bright, Its Explanation is Out of Sight
Jan 06, 2009 |
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(PhysOrg.com) -- A mysterious flash of light from somewhere near or far in the universe is still keeping astronomers in the dark long after it was first detected by NASA's Hubble Space Telescope in 2006. It ...
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Russia in secret plan to save Earth from asteroid: official
Space & Earth / Space Exploration
12 hours ago |
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Russian scientists will soon meet in secret to work on a plan for saving Earth from a possible catastrophic collision with a giant asteroid in 26 years, the head of Russia's space agency said Wednesday.
Keck Telescopes Take Deeper Look at Planetary Nurseries
Dec 23, 2009 |
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(PhysOrg.com) -- Astronomers using the W. M. Keck Observatory have peered far into a young planetary system, giving an unprecedented view of dust and gas that might eventually form planets similar to Jupiter, ...
Vampires and collisions rejuvenate stars
Dec 23, 2009 |
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Stars in globular clusters are generally extremely old, with ages of 12-13 billion years. However, a small fraction of them appear to be significantly younger than the average population and, because they ...
Filipino troops try to keep volcano evacuees safe
Space & Earth / Earth Sciences
Dec 23, 2009 |
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(AP) -- Police and soldiers donned Santa hats and red clown noses and belted out songs in crammed evacuation centers in hopes of keeping 47,000 displaced residents from sneaking back to their homes on the ...
Most of 47,000 Filipinos safe from raging volcano
Space & Earth / Earth Sciences
Dec 22, 2009 |
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(AP) -- Almost all of the 47,000 residents living on the slopes of a rumbling volcano in the central Philippines have moved to emergency shelters, and lava and earthquakes Tuesday heralded what officials ...
Brown dwarf pair mystifies astronomers
Dec 21, 2009 |
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(PhysOrg.com) -- Two brown dwarf-sized objects orbiting a giant old star show that planets may assemble around stars more quickly and efficiently than anyone thought possible, according to an international ...
A New Method of Estimating Stellar Distances
Dec 21, 2009 |
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(PhysOrg.com) -- The star Chi Cygni is located about 550 light-years away, in the direction of the constellation of Cygnus the Swan. It is a notable star because, unlike the sun which still burns hydrogen ...
Philippine volcano gets louder, could erupt soon
Space & Earth / Earth Sciences
Dec 21, 2009 |
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(AP) -- Philippine troops on Monday pressed the last 3,000 villagers who have refused to heed government warnings to leave the danger zone around a volcano that experts say is ready to erupt.
Studying how black holes grow
Space & Earth / Space Exploration
Dec 17, 2009 |
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Black holes are some of the most exotic objects in the universe. They are the final evolutionary stage of giant stars much larger than the sun. When these stars explode, their cores collapse down to the size ...
How water forms where Earth-like planets are born
Dec 17, 2009 |
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(PhysOrg.com) -- In a study that helps to explain the origins of water on Earth, University of Michigan astronomers have found that water vapor can form spontaneously in habitable zones of solar systems, and that it develops ...
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