If a star rises on the eastern horizon at 10:00PM....what time will it rise the next night?

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If a star rises on the eastern horizon at 10:00PM....what time will it rise the next night?

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2007-09-12 15:51:35 · 2 answers · asked by SMD8 1 in Science & Mathematics ➔ Astronomy & Space

2 answers

About 9:56 PM.

That's because the earth takes 23 hours, 56 minutes to rotate once on its axis.

During that time, it has also moved in its orbit and it has to rotate for 4 more minutes in order to achieve the same orientation with respect to the sun--that's where we get a 24-hour day.

2007-09-12 16:00:08 · answer #1 · answered by RickB 7 · 4⤊ 0⤋

The sidereal day is 4 minutes shorter than the 24-hour solar day, so it would rise about 4 minutes earlier (9:56 pm).

2007-09-12 23:01:02 · answer #2 · answered by Anonymous · 3⤊ 0⤋