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To: MtnClimber

2 posted on 09/19/2020 3:51:36 PM PDT by MtnClimber (For photos of Colorado scenery and wildlife, click on my screen name for my FR home page.)

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To: 21stCenturion; 21twelve; .30Carbine; 4everontheRight; AFB-XYZ; America_Right; Art in Idaho; ...

Pinging the APOD List

3 posted on 09/19/2020 3:52:35 PM PDT by MtnClimber (For photos of Colorado scenery and wildlife, click on my screen name for my FR home page.)

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To: MtnClimber

It has been a long time since I read about magnitudes, but I recall that a difference of 5 magnitudes means 100 times difference in brightness, so Alnilam is about 100 times as bright as Bellatrix.

4 posted on 09/19/2020 3:57:42 PM PDT by Verginius Rufus

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To: MtnClimber

8 posted on 09/19/2020 4:56:42 PM PDT by sauropod (I will not comply.)

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