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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.

Comet Ikeya-Zhang's Busy Tail

Explanation: One of the brightest comets of the past five years will likely reach its peak brightness this week. Comet Ikeya-Zhang , officially known as C/2002 C1, can now be seen without aide from a dark location above the western horizon shortly after sunset. Recent luminosity estimates for Comet Ikeya-Zhang place it between magnitudes three and four, making it brighter than most commonly visible stars. The above picture was taken on March 11 near Tucson, Arizona , USA . The image caught Comet Ikeya-Zhang showing a quite detailed ion tail , possibly disrupted by the magnetic field of the Sun 's outwardly flowing particle wind . As the activity of comets is notoriously hard to predict, Comet Ikeya-Zhang may still hold some surprises as it rounds the Sun this month and starts back out of the Solar System in April.

Date March 18, 2002
Credit Credit & Copyright: Gilbert Jones
Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.