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Celestial Targets Transition From Evening to Morning Sky

  • Chuck Bueter
  • 5 days ago
  • 1 min read

Updated: 3 days ago

Sometimes a stargazer's target transition from an evening sky to a morning sky. For example, from blog post October Comet Near Corona Borealis:

Opening October, Comet C/2025 A6 Lemmon is under the Big Dipper in the morning sky, but transitions mid-month to an evening target.


In late autumn, Corona Borealis (CrB) starts the evening low above the western horizon about 45 minutes after sunset. Through the darkness the sky appears to rotate anti-clockwise, or "starwise," around the north star Polaris. That rotation carries CrB through its setting in the northwest. For hours it rotates out of view behind the obstructing earth. Then it re-emerges from "below," rising in the northeast. About 45 minutes before sunrise, CrB fades into the morning twilight.


On 9 November 2025, an hour after sunset Corona Borealis is low in the NW sky and setting.
On 9 November 2025, an hour after sunset Corona Borealis is low in the NW sky and setting.

On 10 November 2025, an hour before sunrise Corona Borealis is low in the NW sky and  rising.
On 10 November 2025, an hour before sunrise Corona Borealis is low in the NW sky and rising.

Corona Borealis (and all stars) rotates around the north star Polaris. In the late autumn it appears in the NW sky and sets shortly after the sun. After rotating through the night out of view, CrB reappears as it rises in the NE before sunrise.

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