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“Supermoon” Blue Moon Over San Francisco | January 31

Wednesday, January 31, 2018 - 6:04 pm | Cost: FREE
San Francisco Bay Area |



“Supermoon” Night Over San Francisco

Thanks to an optical illusion in the sky, the moon will appear bigger and brighter than normal in the San Francisco Bay Area in the night, during what astronomers call a “supermoon.”

Because the sun is about 50,000 miles closer to the earth than at its furthest point – and it’s a full or new moon – the moon will appear larger and brighter than most full moons. To be considered a supermoon, it has to be within 224,851 miles (361,863 kilometers) of our planet, as measured from the centers of the moon and Earth.

The best time to observe the supermoon is when the moon is near the horizon during either moonrise or moonset, thanks to having objects in the foreground (like buildings or trees) to provide reference points for estimating the moon’s size.

Source: EarthSky

Wednesday, January 31, 2018
“Supermoon” Night Over San Francisco

Be sure to look up in the sky to spot the supermoon over San Francisco. Anytime there’s two full moons in a month, the second is called a “blue moon.”

The best time to see the biggest effect of the supermoon is right at moonrise and at moonset so you can see the moon against hills, buildings and the horizon – that’s when it “appears” to be at its biggest since you have something in your field of view to compare it to. Moonrise on January 31, 20178 in San Francisco is 6:04pm. Moonset the next morning is 8:06am.

This is also the last supermoon for 2018. The Moon will be at its closest approach to the Earth and may look slightly larger and brighter than usual.


Links: Event details

Cost: FREE

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Categories: **Annual Event**, *Top Pick*, Celestial Events, East Bay, Geek Event, Kids & Families, North Bay, Peninsula, San Francisco, South Bay Submitted by

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