moon – Page 4 – National Radio Astronomy Observatory

How Often Do We Have a “Blue Moon”?

Unfortunately, there are two commonly used definitions for a “Blue Moon”. Since a year has 12 months, and the…

This change in the position of moonrise throughout a given month is due to three factors. First, the Earth’s…

For your first question, I believe that the azimuth values listed are geographic azimuth values, where azimuth 0 is…

Assuming that the placement of the rockets is such that the Moon’s orbital speed would increase, this would decrease…

Exactly for the reasons you describe, Venus and the Full Moon do not appear near each other in the…

Really the best thing to do is to use an application on one’s cell phone which shows what objects…

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