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First quarter moon appears half-illuminated
The first quarter moon come halfway between new and full moon. One quarter of the moon is visible from Earth: half the moon's lighted half.
January 9, 2022
2021 moon phases, with distances from Earth
2021 moon phases in a chart format. Dates closest to new moon provide the darkest skies and the best opportunities for stargazing and meteor-watching.
July 30, 2021
Great chance to spot a very young moon April 12
From central North America on April 12, 2021, the moon will be less than 24 hours old. On April 12 at sunset, as soon as the sun slips below the horizon, the race begins to spot a young moon, less than a day old ... before it sets!
April 12, 2021
People sleep less before a full moon
Researchers find that whether you live in a rural or urban environment, your sleep patterns are affected by the full moon. On the nights leading up to full moon, people fall asleep later and sleep less overall.
February 25, 2021
Do we all see the same moon phase?
No matter where you are on the globe, we all see the same moon. So why do photos from a distant location sometimes look different from what you're seeing?
February 24, 2021
What is a waxing gibbous moon?
A waxing gibbous moon is in the sky when darkness falls. It lights up the early evening. It appears more than half lighted, but less than full.
January 21, 2021
What is a full moon?
The full moon is opposite the sun in its orbit, so the sunlit day side of the moon is what you see.
January 1, 2021
What is a waning crescent moon?
A waning crescent moon can be found in the east before sunrise. It's waning toward new moon, when the moon will be between Earth and the sun.
January 1, 2021
What is a waxing crescent moon?
A waxing crescent moon shines in the west after sunset. It quickly follows the sun below the western horizon.
January 1, 2021
What is a last quarter moon?
The last quarter moon appears a week after full moon and a week before new moon.
January 1, 2021
