The Moon is still pretty full in the sky, so there's lots of opportunity to catch a glimpse of some special features on its surface.
What is today’s Moon phase?
As of Sunday, May 3, the Moon phase is Waning Gibbous. Tonight, 98% of the moon will be be lit up, according to NASA's Daily Moon Guide.
Without any visual aids, tonight you should be able to see the Mare Serenitatus and Vaporum, and the Oceanus Procellarum. With binoculars, you'll see the Posidonus Crater, Endymion Crater, and the Mare Humorum. And, finally, with a telescope you'll see all this plus the Apollo 14 and 17 landing spots, as well as the Descartes Highlands.
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When is the next Full Moon?
There are two Full Moons in May, with the next due to take place on May 31.
What are Moon phases?
According to NASA, the Moon takes roughly 29.5 days to circle Earth once, going through eight distinct phases in the process. Even though we always see the same side of the Moon, the amount of sunlight hitting it changes as it moves in its orbit. The shifting light creates the changing shapes we know as full, half, and crescent Moons. Altogether, there are eight main lunar phases.
New Moon - The Moon is between Earth and the sun, so the side we see is dark (in other words, it's invisible to the eye).
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Waxing Crescent - A small sliver of light appears on the right side (Northern Hemisphere).
First Quarter - Half of the Moon is lit on the right side. It looks like a half-Moon.
Waxing Gibbous - More than half is lit up, but it’s not quite full yet.
Full Moon - The whole face of the Moon is illuminated and fully visible.
Waning Gibbous - The Moon starts losing light on the right side. (Northern Hemisphere)
Third Quarter (or Last Quarter) - Another half-Moon, but now the left side is lit.
Waning Crescent - A thin sliver of light remains on the left side before going dark again.