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This new moon ends the longest lunar month of the 21st century and begins the longest lunar month of 2018.
On Sunday morning, Jupiter and Mars were half a moon-diameter apart. Now the moon is sweeping past. Plus Mercury and Saturn are in conjunction this weekend. Photos here.
In 2018, the moon swings farthest from Earth for the year on January 15, only 2 weeks after coming closest to Earth for the year on January 1.
Plan ahead now for an awesome year of meteor-watching. Good news! In 2018, the year’s 2 most reliable showers – August Perseids and December Geminids – happen with little to no interference from the moon.
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.
Moon and Uranus February 19 and 20
Return of the young moon, and Venus