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Year’s shortest day comes at winter solstice. But, for Northern Hemisphere, earliest sunsets happen around early December. Southern Hemisphere? Your earliest sunrises are around now.
Earth without its moon would be a very different world indeed. No eclipses. Smaller tides. But the biggest change would be in the length of Earth’s day.
One journey of our sun and planets around the center of our Milky Way galaxy is sometimes called a cosmic year. That’s approximately 225-250 million Earth-years.
When we look up or down – away from the flat disk of the galaxy or toward it – we’re seeing Milky Way stars. But we also see a few more distant objects, visible to the eye alone.
This star in the constellation Cetus varies in brightness over about 11 months. Its next brightness maximum is due in early 2017.
One half of the W of Cassiopeia is more deeply notched than the other half. This deeper V is your “arrow” in the sky, pointing to the Andromeda galaxy.
Many believe that turkey is high in tryptophan, which causes that drowsiness you feel after a big Thanksgiving meal. True?
A dark sky, a friend and a flashlight to point out Milky Way sights.
Over its lifetime of about 25 years, an Arctic Tern can fly a million kilometers – nearly three times the distance from the Earth to the moon.
At this time of year, for all of us around the globe, the Pleiades cluster culminates – reaches its highest point in the sky – around midnight.
Don’t miss moon and Venus December 2
See it! Moon sweeps past evening planets