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Sun in zodiac constellations, 2018

Sun-entry dates to zodiac constellations in 2018, using boundaries for constellations set by International Astronomical Union in 1930s.

How to translate UTC to your time

The Earth has 24 time zones. Look here to learn how to translate UTC to your local time zone.

Are December’s solstice and January’s perihelion related?

December solstice 2017 was December 21. Earth is closest to the sun for 2018 on January 2-3. Coincidence?

Super effect on us from supermoons?

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.

Moonlight for 2018 Quadrantid meteors

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.

See brightest star Sirius at midnight on New Year’s Eve

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 is the Bull’s fiery eye

Aldebaran – brightest star in Taurus the Bull – is huge! If it replaced our sun, its surface would extend almost to the orbit of Mercury.

Was the Christmas Star real?

Some possible astronomical explanations for the Star of Bethlehem or Christmas star.

Solstice arrives December 21

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!

Watch for Ursid meteors

Ursid meteor shower active each year around December solstice. In 2017, the peak is probably Friday morning, December 22.