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“Supermoon” Night Over San Francisco | December 3

Sunday, December 3, 2017 - All Day | 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

The Moon will be located on the opposite side of the Earth as the Sun and its face will be fully illuminated. This phase occurs at 15:47 UTC on December 3, 2017.

This full moon was known by early Native American tribes as the Full Cold Moon because this is the time of year when the cold winter air settles in and the nights become long and dark. This moon has also been known as the Full Long Nights Moon and the Moon Before Yule.

This is also the only supermoon for 2017. 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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