The Start of Spring

The March equinox occurs on Sunday, March 20, 2022. In the Northern Hemisphere, this is known as the vernal, or spring, equinox and marks the start of the spring season. In the Southern Hemisphere, autumn begins.

At this time, the Sun crosses the celestial equator on its way north. Also on this day, the Sun rises exactly in the east and sets exactly in the west—a good thing to know if you get lost in the woods.

The March equinox occurs on March 20 at 11:33 A.M. EDT this year, ushering in the spring season in the Northern Hemisphere. At this time, the Sun’s position will be at which of the following coordinates on the celestial sphere?

A. 0 hour right ascension, 0° declination. B. 6 hours right ascension, 23.5° North declination. C. 12 hours right ascension, 0° declination D. 18 hours right ascension, 23.5° South declination


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