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4 keys to understanding moon phases
As the moon circles Earth, we see different fractions of its lighted face: the changing moon phases. Here are 4 tips for understanding them.
January 1, 2026
What is a new moon? It rises and sets with the sun
The new moon generally can't be seen, except during a solar eclipse. The moon crosses the sky with the sun during the day, and its shadow side faces Earth.
January 1, 2026
What is a waxing crescent moon?
A waxing crescent moon shines in the west after sunset, first visible a day or two after new moon with earthshine. It sets after the sun after sunset.
January 1, 2026
Do we all see the same moon phase from Earth?
No matter where you are on the globe, we all see the same moon phase. So why do photos from a distant location sometimes look different from what you're seeing?
November 4, 2025
Do you sleep less before a full moon? Research says yes
A new study shows that - whether you live in a rural or urban environment - you might sleep less before a full moon.
September 27, 2025
Lunar occultation of Mars on January 13, 2025. Images here!
The full Wolf Moon passed in front of red Mars for some observers last night. Here are some great images of the lunar occultation of Mars.
January 14, 2025
Black Moon coming on December 30-31
We'll have a Black Moon - the second new moon in a calendar month - overnight from December 30 to 31, 2024. Here's what you'll see that night.
December 29, 2024
November full moon is the Super Beaver Moon
The November full moon will fall on November 15, 2024. It's the Super Beaver Moon. Bright Jupiter, Aldebaran and the Pleiades will lie nearby.
November 15, 2024
September full moon is a Super Harvest Moon September 17-18
The September full moon - the Super Harvest Moon - happens overnight on September 17-18, 2024. There's a partial lunar eclipse, too.
September 16, 2024
2024’s biggest eclipse MISS happens January 11
January's new moon will be the biggest eclipse miss of 2024, an ultra-thin crescent not nearly aligned closely enough with the sun for a solar eclipse.
January 10, 2024
