Linkmarks
Items waiting in the Pocket queue: 2284
Astronomers say they have observed, for the first time, a distant icy world orbiting beyond Neptune as it passed briefly in front of a bright star.
2010-06-16
Kuiper Belt Solar System eclipse planet asteroid comet
A study using the Herschel space telescope aimed to measure the fraction of deuterium, a rare type of hydrogen, present in the comet's water. Like our oceans, it had half the amount of deuterium seen from other comets. The result, published in Nature, hints at the idea that much of the Earth's water could have initially come from cometary impacts.
2011-10-06
comet water hydrogen deuterium oceanNEOShield is a new international project that will assess the threat posed by Near Earth Objects (NEO) and look at the best possible solutions for dealing with a big asteroid or comet on a collision path with our planet.
2012-01-20
asteroid comet Earth collision trajectory