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07/01/2021 – Ephemeris – Looking ahead at July’s skies

1 Jul 2021, 04:01 UTC
07/01/2021 – Ephemeris – Looking ahead at July’s skies
(200 words excerpt, click title or image to see full post)

This is Ephemeris for Thursday, July 1st. Today the Sun will be up for 15 hours and 30 minutes, setting at 9:32, and it will rise tomorrow at 6:01. The Moon, at last quarter today, will rise at 1:54 tomorrow morning.
Let’s preview July’s skies. The Sun, having reached its northern solstice, is beginning to slide southward again, at first imperceptibly, then with greater speed. The daylight hours will decrease from 15 hours and 30 minutes today to 14 hours 41 minutes at month’s end. The daylight hours will be slightly shorter south of Interlochen, and slightly longer to the north. The altitude of the Sun at local noon, when it is due south, will decrease from 68 degrees today to 63 degrees at month’s end. The Sun will be a degree lower in the Straits area. Despite the warmth, the Earth will reach its greatest distance from the Sun late Monday. That’s called aphelion where the Sun will be almost 94.5 million miles (152 million kilometers) away, which makes summer the longest season.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT-4). They may be different for your location.
July Evening Star ...

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