What is the upper limit for massive stars?
Yesterday I mentioned that hypernovae (super-supernovae) are the result of the explosion of a star that's about as massive as a star can be (about 150-200 solar masses). But how exactly do we know that t ...
Past climate change and continental ice melt linked to varying CO2 levels
Scientists at the Universities of Southampton and Cardiff have discovered that a globally warm period in Earth's geological past featured highly variable levels of CO2.
Indian spacecraft on course to enter Mars orbit (Update)
India will soon know if its first interplanetary mission will achieve its goal, when a spacecraft built with homegrown technology for a remarkably low price tag of $75 million begins its final maneuvers into ...
'Space bubbles' may have aided enemy in fatal Afghan battle
In the early morning hours of March 4, 2002, military officers in Bagram, Afghanistan desperately radioed a Chinook helicopter headed for the snowcapped peak of Takur Ghar. On board were 21 men, deployed ...
Warming Earth heading for hottest year on record (Update)
Earth is on pace to tie or even break the mark for the hottest year on record, U.S. meteorologists say.
Causes of California drought linked to climate change
The atmospheric conditions associated with the unprecedented drought currently afflicting California are "very likely" linked to human-caused climate change, Stanford scientists say.
New milestone in the search for water on distant planets
Astronomers have found water vapor in the atmosphere of a planet about four times bigger than Earth, in the constellation Cygnus about 124 light years - or nearly 729 trillion miles - from our home planet. ...
MAVEN Mars spacecraft to begin orbit of Red Planet
A NASA spacecraft that aims to study the upper atmosphere of Mars and reveal how its climate changed over time is poised to begin orbiting the Red Planet on Sunday.
US spacecraft enters Mars orbit, India probe next (Update)
NASA's Maven spacecraft entered orbit around Mars for an unprecedented study of the red planet's atmosphere following a 442 million-mile (710 million-kilometer) journey that began nearly a year ago.
If trees could talk: Forest research network reveals global change effects
Permafrost thaw drives forest loss in Canada, while drought has killed trees in Panama, southern India and Borneo. In the U.S., in Virginia, over-abundant deer eat trees before they reach maturity, while ...
Researcher studies possibility of metal snow on Venus
Is it snowing metal on Venus? Erika Kohler is trying to find out.
Cyanide ice in Titan's atmosphere
Gigantic polar clouds of hydrogen cyanide roughly four times the area of the UK are part of the impressive atmospheric diversity of Titan, the largest moon of Saturn, a new study led by Leiden Observatory, ...
NASA prepares its science fleet for Oct. 19 Mars comet encounter
NASA's extensive fleet of science assets, particularly those orbiting and roving Mars, have front row seats to image and study a once-in-a-lifetime comet flyby on Sunday, Oct. 19.