EarthSky | Halloween is an astronomical holiday
The 4 cross-quarter days fall between equinoxes and solstices. Halloween is the spookiest one. It comes from a festival of ancient Celts and Druids.
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The 4 cross-quarter days fall between equinoxes and solstices. Halloween is the spookiest one. It comes from a festival of ancient Celts and Druids.
Some October night, check out 3 of the flashiest stars in the night sky ... at least at this time
With Venus at greatest elongation east, it slides as far from the sun as possible, creating a viewing target after
Look for Mercury before sunrise! Greatest elongation happens October 25. This is the Northern Hemisphere's best Mercury apparition of 2021.
What are star trails? Photographers point cameras skyward and take long-exposure photos. You see streaks caused by Earth's rotation.