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Credit & Copyright: Stefan Seip
Explanation:
Sweeping northward in planet Earth's sky,
comet Machholz
extended its long ion tail with the
Pleiades star cluster
in the background on January 7th.
This stunning view,
recorded with a telephoto lens in
skies over Oberjoch, Bavaria, Germany, emphasizes faint,
complex tail
structures and the scene's lovely blue
and green colors.
Merging with the blue dust-reflected starlight of the Pleiades,
colors in the comet's
ion tail and greenish coma are
produced as gas molecules
fluoresce in sunlight.
Reflecting the sunlight, dust from
comet Machholz trails
along the comet's
orbit
and forms the whitish tail jutting
down and toward the right.
While the visible
coma
spans about 500,000 kilometers,
the nucleus of the comet, likely only a few kilometers
across, lies hidden within.
Comet tails can extend
many millions of kilometers
from the nucleus, but appear substantially shortened
because of perspective.
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NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture
Of the Day
Publications with keywords: Comet Machholz - pleiades - comet - star cluster - comet tail - M 45
Publications with words: Comet Machholz - pleiades - comet - star cluster - comet tail - M 45
See also:
- APOD: 2025 September 18 Á Comet C/2025 R2 SWAN
- APOD: 2025 September 16 Á New Comet SWAN25B over Mexico
- APOD: 2025 August 25 Á The Meteor and the Star Cluster
- APOD: 2025 July 8 Á The Pleiades in Red and Blue
- APOD: 2025 July 7 Á Interstellar Comet 3I ATLAS
- APOD: 2025 July 4 Á NGC 6946 and NGC 6939
- Young Star Cluster NGC 346