c/2013 a1

Siding Spring Speeding and Spouting

NASA released Thursday an image of a comet that, on Oct. 19, will pass within 84,000 miles of Mars — less than half the distance between Earth and our moon. The image on the left,…


Run for cover, rovers!

There’s a chance a comet will hit Mars in 2014. Read more about it on the Planetary Society website and Phil Plait’s blog here and here. The comet is called C/2013 A1 (Siding Spring) and…