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Best of 2025: Night sky scenes not to miss
Best of 2025: Night sky scenes chosen for you by the editors of EarthSky that you won't want to miss. Mark your calendars now!
What is a supermoon?
A full moon or new moon is a supermoon when it’s also within 90% of its closest point to Earth. Find out when the next supermoon is at EarthSky.org.
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Get our top tips for planet-observing, from the innermost and elusive Mercury out to faint blue Neptune and more.