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APOD: 2025 October 13 – Lemmon Tree

APOD: 2025 October 13 – Lemmon Tree

30 de julho de 2026
há cerca de 1 hora
APOD: 2025 October 13 – Lemmon Tree

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.

A tree is seen silhouetted against a night sky filled with stars. Above the tree with its tail pointing nearly vertically is a comet: Comet Lemmon. Please see the explanation for more detailed information.

Lemmon Tree

Explanation: The tree is not in danger. That's because the comet pictured just above it, Comet C/2025 A6 (Lemmon) , is far in the distance, well away from the Earth. Comet Lemmon now continues to brighten as it arcs through the inner Solar System , even though it has passed its nearest to the Sun -- because it is now approaching the Earth . The comet will likely appear brightest when it is at its closest to the Earth next week, then closing to about half the Earth-Sun distance . Comet Lemmon may then be visible to the unaided eye, but it is more likely to be imaged by a camera phone -- if you know where to look . Comet Lemmon, previously best visible in the morning, is now also visible in the evening sky for northern observers: look above the western horizon just after sunset. The featured image , centered on an unsuspecting European beech tree, was taken in Slovenia about ten days ago.

Date October 13, 2025
Credit Image Credit & Copyright: Uroš Fink
Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.

NASA

Agência Espacial Americana

Fonte original