冬至前后,乌尔西德流星雨达到顶峰

12月经常被忽视的Ursid流星雨保持在清晨的天空上 22, 冬至之后.

This small meteor shower can really be seen only from the Northern Hemisphere with between five and 10 meteors streaking across the sky per hour.
The Ursids peak on the evening of December 21, leading into the early morning hours of December 22. The moon will be 50% 满的. 那, combined with the often cloudy winter nights of December, could obscure your view of this little shower.
If you want the best perspective of the shower, wait for the moon to set around 12:30 上午. ET December 22, according to NASA. Then watch the skies for about an hour.
    The meteor shower originates from the Ursa Minor constellation, known as the Little Dipper, but the meteors will be visible streaking across the entire sky.
    The Ursids are a relatively new meteor shower, 根据 EarthSky.org‘s skywatching guide. While many of the meteor showers we see throughout the year have been annual occurrences for centuries, the Ursids weren’t observed until the 20th century.
    The meteor shower happens when Earth passes close to the orbit of comet 8P/Tuttle and this year, our close pass includes several trails of debris that also follow this comet, 根据 American Meteor Society. This could cause more activity during the meteor shower.
    Don’t look straight up at the sky. Aim for about halfway up in the sky, according to the American Meteor Society.
      Geminid meteor shower is also ongoing through Sunday, and the winter solstice occurs a day later on December 21.
      And don’t forget to keep an eye out for the so-calledChristmas Star” (which isn’t actually a star) 在十二月 21. That’s when Jupiter and Saturn come the closest together in our sky than they have in centuries. This conjunction will make them appear like a double planet during twilight.

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