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The shimmering curtains of the northern and southern lights — aurora borealis and aurora australis, respectively —...
Astronomy.com
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On May 23, 1967, a highly active sunspot region, McMath Region 8818, produced a series of solar...
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Looking for a sky event this week? Check out our full Sky This Week column. May 22: Busy moons...
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The final mission before the landmark Apollo 11, Apollo 10 served as a dress rehearsal, testing every...
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Looking for a sky event this week? Check out our full Sky This Week column. May 21: Check in...
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Sky This Week is brought to you in part by Celestron. Friday, May 22Uranus is in conjunction...
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Venus and Jupiter remain visible in the evening sky soon after sunset early in July, although Jupiter...
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To be a planet, NASA says an object must be big enough that its gravity has cleared...
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Sirius is a blue giant, which burns through its fuel quickly and lives only a relatively short...
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How and where are rocks tested to see if they’re meteorites? Can a member of the public...
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One night, out at the Miami Valley Astronomical Society’s observatory near Dayton, Ohio, I saw a bright...
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As July begins, three planets adorn the early evening sky. Look toward the northwest and you’ll see...
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The constellation Auriga (pronounced or-EYE-guh) the Charioteer, a star pattern known by this name for several thousand...
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Distance from Earth (logarithmic scale) — Moon 1 mi 10 mi 100 mi 1,000 mi 10,000 mi...
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The constellation ARA (pronounced AIR-uh) the Altar was one of the “original” constellations of the Greeks. It...
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The constellation Ophiuchus (pronounced off-ee-OO-cuss) the Serpent-bearer isn’t all that easy to pick out, primarily because of...
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Dave Doctor from Las Cruces, New Mexico The emission nebula Sharpless 2–284 lies roughly 15,000 light-years away...
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For the July 2026 issue of Astronomy, we’re bringing you our first ever digital-only issue, with all...
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In 1878, Williamina Fleming immigrated to Boston from Scotland with her husband – but he abandoned her...
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Looking for a sky event this week? Check out our full Sky This Week column. May 20: The Moon...