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What’s Launching This Week
Picture of the Day
An interstellar visitor
Gerald Rhemann, taken from Farm Tivoli, Namibia
The interstellar comet 3I/ATLAS shows off a complex tail structure — plus an anti-tail, possibly caused by the nucleus emitting dust from its warmer, sunlit side. This shot was taken on Dec. 2 with a 12-inch f/3.6 astrograph and 38 minutes of LRGB exposure.

December 2025
- How we track near-Earth asteroids
- How to spot an asteroid tonight
- A farewell to Jim Lovell
- Astronomy tests ZWO’s Seestar S30

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