Extremely rare but incredibly powerful gamma radiation explosions would be strong enough to wipe out all life on the planet, say researchers.
Astronomers say they’ve discovered water ice clouds on a “brown dwarf” just 7.3 light-years from Earth – the first candidate outside our own solar system to have direct evidence of water clouds.
90 percent of respondents say scientists are working for the benefit of humanity.
Comet ISON appears to have broken up and evaporated as it neared the sun.
Astronomers and scientists joined Seth MacFarlane at the Library of Congress for the opening of a new collection of Carl Sagan’s papers.
Some parts of the world may have a spectacular lights show to look forward to next year, when the Comet ISON passes through the sky.