Archive for July 4, 2019

07/04/2019 – Ephemeris – Happy Independence Day, at our farthest from the Sun

July 4, 2019 Comments off

Ephemeris for Independence Day, Thursday, July 4th. Today the Sun will be up for 15 hours and 28 minutes, setting at 9:31, and it will rise tomorrow at 6:03. The Moon, 2 days past new, will set at 11:20 this evening.

Today, Independence Day the Earth is at its greatest distance, aphelion, from the sun or about 94.5 million miles (152.2 million km) from the Sun. It doesn’t do much to weaken the strength of sunlight, as you will find out when you go to the beach. But, occurring in summer, it makes summer the longest season by a several days over winter. Our calendar tries to keep up with the seasonal or tropical year, while the Earth’s revolution from its farthest or aphelion point to the next is slightly longer. Back in 1776, at the founding of our nation, the Earth was farthest from the Sun on June 30th. As we go more centuries into the future our summer will even get a bit longer. But remember the poor Australians, and others in the southern hemisphere, whose winter will also get longer.

The times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.


Earth's orbit

The Earth’s elliptical orbit, somewhat exaggerated, showing perihelion, aphelion and the seasons. Credit “Starts with a Bang” blog by Ethan Siegel.

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