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Astronomy Essentials
Tonight
Visible planets and night sky guide for October
Visible planets and night sky guide. Watch a video about astrophotography. And this evening, look for the waxing crescent moon and the red star Antares.
October 15, 2026
Sun
Sun news: See a huge solar eruption
Sun news, October 15, 2026: A large filament in the northeast erupted yesterday, hurling plasma into space. And that wasn't the only spectacular eruption.
Tonight
What star in the northeast flashes colorfully? It’s Capella!
If you're in Earth's Northern Hemisphere and see a bright star twinkling with red, green and blue flashes low in the northeast on October evenings, it's probably Capella. See charts here!
October 15, 2026
Today's Image
Strange cloud! What was it? Observers in U.S. East report
Many people up before sunrise on Tuesday morning saw a strange cloud. It was the plume from a SpaceX rocket. See stunning images here!
October 14, 2026
Today's Image
Best deep-sky photos of September 2026 from EarthSky community
Enjoy this gallery of deep-sky photos from September 2026 by our EarthSky community. If you have a great photo to share, we'd love to see it!
October 14, 2026
Astronomy Essentials
Proxima Centauri is the closest star to our sun
Proxima Centauri is the nearest star to our sun at 4.22 light-years away. It's home to at least 3 planets and has massive solar flares.
October 14, 2026
Human World
Space
NASA’s Perseverance rover on Mars sets off-world driving record
The Mars Perseverance rover has set a new distance record on Mars. It has driven 28.10 miles (45.22 km) across the surface of the red planet.
October 13, 2026
Space
Weirdest cloud on Mars formed via ‘exotic physics’
The weirdest cloud on Mars has a funny-sounding name. Scientists call it the Arsia Mons Elongated Cloud. Come find out what's weird about it!
October 13, 2026
Astronomy Essentials
Constellations
Meet Aquarius the Water Bearer and its stars
Aquarius lies in a “watery” part of the sky, near Pisces the Fish, Cetus the Whale, Eridanus the River and Piscis Austrinus the Southern Fish.
October 13, 2026
Earth
Amazon wildfires hide another threat to the rainforest
Amazon wildfires are weakening the rainforest’s ability to absorb carbon, as ozone pollution damages trees that survive the flames.
October 12, 2026
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