Comet Lemmon (Comet C/2025 A6), discovered early this year, is growing brighter and has begun to appear in the northern sky before dawn. The comet will make its closest approach to the sun on Nov. 8 and is expected to come closest to Earth on Oct. 21, earlier than that. At that time, the comet may become bright enough to be visible to the naked eye. It will be best seen in the pre-dawn sky through mid-October, and after that it is expected to be observable in the evening sky as well.
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