Watch Live As a Mountain-Sized Comet Zooms By Mars

Siding Spring sounds like such a tranquil name for a massive comet. After traveling millions of years at the leisurely pace of about 33 miles per second, the comet will fly by Mars at around 2:25pm EDT or so, passing only 138,000 kilometers from the red planet. This is a little bit more than one-third the distance of… » 10/19/14 1:35pm Sunday 1:35pm

Spectacular comet will engulf Mars this Sunday in historical event

This Sunday something historical will happen: An ancient rare comet will arrive to Mars after millions of years traveling at 33 miles per second from the Oort cloud. It will look like you can see above, passing just within a third of the distance from the Earth to the Moon, engulfing the Red Planet in its large tail. » 10/17/14 1:44pm Friday 1:44pm

New comet photo shows fascinating textures and landscapes

Every time I see a new image of the Churyumov-Gerasimenko comet, I just get lost searching through all the detail, marveling at the variation of textures, and mostly watching in awe thinking about the chain of events that took the spaceship Rosetta to where it is today, 500 million miles from Earth. » 8/15/14 11:57pm 8/15/14 11:57pm

A Doomed Comet Hurtling Toward the Sun

The Solar and Heliospheric Observatory (SOHO), launched in 1995, stares mostly at . . . yeah. The sun. But when its instruments are trying to image other things near the sun, all that light gets kind of overwhelming. So sometimes instruments on the SOHO just block the sun out and turn their attention to other things.… » 10/27/13 8:00pm 10/27/13 8:00pm

Astronomers Discover Huge Comet Hurtling Towards Us

The Mayan Apocalypse nutcases will pass out when they learn that two Russian astronomers have discovered a new and gigantic comet coming in our direction—a huge two-mile wide ball of ice and rock that "may [become] one of the brightest in history." The comet is now passing by Saturn, gaining speed and becoming… » 10/01/12 11:22am 10/01/12 11:22am