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APOD

Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

See Explanation. Clicking on the picture will download the highest resolution version available.

The Tails of Comet NEAT (Q4)

Explanation: Comet NEAT (Q4) is showing its tails . As the large snowball officially dubbed Comet C/2001 Q4 (NEAT) falls toward the inner Solar System , it has already passed the Earth and will reach its closest approach to the Sun this coming Saturday. Reports place the comet at third magnitude , making it easily visible to the unaided eye to northern sky gazers observing from a dark location just after sunset. The above image was captured last Saturday from Happy Jack, Arizona , USA . Visible is a long blue ion tail , a blue coma surrounding the comet's nucleus , and a shorter but brighter sunlight reflecting dust tail . Q4 will likely drop from easy visibility during the next month as it recedes from both the Earth and the Sun. Another separate naked-eye comet, Comet Linear (T7) , is also as bright as third magnitude and should remain bright into June.

Date May 12, 2004
Credit Credit & Copyright: Chris Schur
Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.