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July's last quarter moon will set by midday on Sunday (July 9), so plan accordingly to see it late tonight.
The moon will be in its half-lit third-quarter phase when it rises from the eastern horizon shortly after midnight overnight tonight before setting to the west around 1 p.m. ET (1700 GMT) on Sunday (July 9), according to In-The-Sky.org. During this phase, which gets its name from the fact that it falls three-quarters of the way through the moon's 29.5-day lunar cycle, the moon will be illuminated on its western, sunward side.
The best time to view the third-quarter moon will be around the time it's at its highest in the sky, between around 5 a.m. and 7 a.m. ET (0900 and 1100 GMT). While many features of the lunar landscape can be viewed during the daylight hours, make sure to take precautions not to point any optics in the direction of the sun if you attempt a daytime observation of the moon, which could cause vision damage.
Related: Night sky, July 2023: What you can see tonight [maps]
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Looking for a telescope to see the features of the third quarter moon up close? We recommend the Celestron Astro Fi 102 as the top pick in our best beginner's telescope guide.
The third-quarter moon is positioned in the sky ahead of Earth in terms of its yearly trip around the sun. Earth follows behind the moon by about 3.5 hours.
Following the third-quarter moon, skywatchers can look forward to increasingly less illumination coming from our natural satellite going into July's new moon, which occurs on July 17. The dark skies in the days following the third-quarter moon and approaching the new moon make for an excellent opportunity to look for deep-sky targets such as the relatively newfound comet C/2023 E1 (ATLAS).
After the third-quarter moon has set early this afternoon, C/2023 E1 (ATLAS) will be positioned in the northern skies just below the handle of the "Little Dipper," the Ursa Minor constellation.
If you are hoping to catch an up-close look at the moon at any point throughout its 29.5-day lunar cycle, our guides to the best telescopes and best binoculars are a great place to start.
And if you want to take photos of the moon or the night sky in general, check out our guides on how to photograph the moon or the best cameras for astrophotography and best lenses for astrophotography.
Editor's Note: If you get a great picture of the third quarter moon and would like to share it with Space.com's readers, send your photo(s), comments, and your name and location to spacephotos@space.com.