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Sun-entry dates to zodiac constellations in 2018, using boundaries for constellations set by International Astronomical Union in 1930s.
The Earth has 24 time zones. Look here to learn how to translate UTC to your local time zone.
December solstice 2017 was December 21. Earth is closest to the sun for 2018 on January 2-3. Coincidence?
A supermoon’s extra pull of gravity creates higher-than-usual tides. But the moon’s pull doesn’t affect a human body nearly as powerfully as it does an ocean.
The 2018 Quadrantid meteor shower is expected to exhibit its narrow peak January 3 around 21-22 hours UTC. The full supermoon nearly coincides, and moonlight will interfere with the shower.
Dog Star Sirius reaches its highest point in the sky around midnight every New Year. For this reason, it might also be called the New Year’s star.
Aldebaran – brightest star in Taurus the Bull – is huge! If it replaced our sun, its surface would extend almost to the orbit of Mercury.
Some possible astronomical explanations for the Star of Bethlehem or Christmas star.
December solstice 2017 arrives on December 21 at 16:28 UTC. High summer for the Southern Hemisphere. For the Northern Hemisphere, the return of more sunlight!
Ursid meteor shower active each year around December solstice. In 2017, the peak is probably Friday morning, December 22.
Westward shift of Orion and all the stars
Stunning Mars images, from Curiosity