How Long Does It Take for a First Quarter Moon to Become a First Quarter Moon Again

View at EarthSky Community Photos. | Greg Diesel fuel-Walck at Ormond-by-the-Ocean, Florida, captured this first quarter moon on January nine, 2022. Thanks, Greg!

First quarter moon

Here are the characteristics of a first quarter moon:

– It'southward the moon phase halfway between new moon and full moon.

– It's a waxing moon.

– As viewed from anywhere on Earth, a starting time quarter moon appears at its highest in the sky at sunset. It sets around the middle of the nighttime.

– Information technology's called a quarter moon, but, from World, it looks half-illuminated, like one-half a pie. Or y'all might say that – at first quarter moon – we're seeing half the moon's solar day side or a quarter of the whole moon.

See the moon phase for every mean solar day in 2021 on EarthSky'south lunar calendar. Lodge now. Going fast!

Equally seen from the north side of the moon'due south orbital aeroplane, the terminators (lines betwixt sunny and shadowed sides) of the Earth and moon align at start quarter moon, and only the nigh half of the moon'south day side is visible from Earth. Click hither to see the animation.

Quarter moon? Half moon?

There'southward some other reason we telephone call this moon a quarter and not a half. It'southward because it'southward one quarter of the way around in its orbit of Earth, equally measured from one new moon to the next.

And what about the term one-half moon? That's a beloved term, only not an official one.

Do you take admission to a small telescope? Here are some scope sights to see on a first quarter moon:

Lunar X and Lunar V appear when the moon is well-nigh its 1st quarter phase. They aren't really Xs and Vs on the moon. They're just high areas, catching sunlight, creating an example of pareidolia on the moon. Aqilla Othman in Port Dickson, Negeri Sembilan, Malaysia, caught them both in May 2017. Discover that he defenseless Lunar X and Lunar V.

Here'south a closer look at Lunar X and Lunar V. Photo by Izaty Liyana in Port Dickson, Negeri Sembilan, Malaysia. What is Lunar X?

Tom Wildoner, wrote: "Ane of my favorite areas to photograph on the moon almost the 1st quarter! I captured this view of the sun lighting up the mount range called Montes Apenninus. The moon was casting a dainty shadow on the back side of the mountains. This mountain range is about 370 miles (600 km) long with some of the peaks rising equally loftier as 3.ane miles (5 km)."

More manufactures about moon phases

Equally the moon orbits Globe, it changes phase in an orderly way. Follow the links below to understand the phases of the moon.

New moon
Waxing crescent moon
First quarter moon
Waxing gibbous moon
Full moon
Waning gibbous moon
Terminal quarter moon
Waning crescent moon

Bottom line: The beginning quarter moon occurs halfway betwixt new moon and full moon. I quarter of the moon is visible from Earth, significant that you see half the daylit side of the moon, looking like half a pie.

Read more than: Top 4 keys to agreement moon phases

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Deborah Byrd

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About the Author:

Deborah Byrd created the EarthSky radio series in 1991 and founded EarthSky.org in 1994. Today, she serves as Editor-in-Main of this website. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named 3505 Byrd in her honor. A science communicator and educator since 1976, Byrd believes in science as a strength for good in the world and a vital tool for the 21st century. "Being an EarthSky editor is similar hosting a big global party for absurd nature-lovers," she says.

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Source: https://earthsky.org/moon-phases/first-quarter/

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