(NASA ) The new comet on the block, whose formal name is C/2012 S1, was discovered last September by two Russian astronomers using the International Scientific Optical Network's 16-inch (40-centimeter) telescope near Kislodovsk.
Deep Impact probe tracks 'Comet of the Century'
FEBRUARY 06, 2013Alan Boyle, Science Editor, NBC News
Comet ISON is still too dim to be seen with the naked eye, but a fresh series of images from NASA's Deep Impact spacecraft tracks what skywatchers hope will become the "Comet of the Century" nine months from now.
The pictures were taken by Deep Impact's Medium-Resolution Imager over a 36-hour period on Jan. 17 and 18, when the spacecraft was 493 million miles (793 million kilometers) from the comet, and roughly 185 million miles (300 million kilometers, or 2 AU) from Earth.Read more: Cosmic Log