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Astronomy Essentials
Tonight
Visible planets and night sky guide for August
Visible planets and night sky guide: This evening, the waxing crescent moon will hang near brilliant Venus and the bright star Spica. Don't miss them!
August 17, 2026
Space
A moon for Mars! Asaph Hall finds Phobos 149 years ago
On this date in 1877, astronomer Asaph Hall discovered a moon for Mars: Phobos, the larger of 2 moons. He discovered the other moon, Deimos, later that year.
August 17, 2026
Space
Swift spacecraft, and a mission to save it, caught on video
The Swift space telescope is falling back to Earth. The LINK spacecraft is trying to save it. See both in orbit in a new video.
August 16, 2026
Space
Were these polygonal cracks on Venus once on a seafloor?
Sprawling, huge cracks on Venus have long puzzled scientists. A new study suggests the polygon shapes formed from drying mud on an ancient seafloor.
August 15, 2026
Astronomy Essentials
Deep partial lunar eclipse on August 27-28, 2026
A deep partial lunar eclipse takes place of the full Sturgeon Moon on August 27-28, 2026, It's well placed for the Western Hemisphere.
August 15, 2026
Earth
Human World
Ancient Amazon civilization might have been home to millions
Laser surveys have revealed hundreds of earthworks in the Amazon. Researchers estimate the ancient Amazon civilization could have supported 3 million people.
August 14, 2026
Astronomy Essentials
What’s a globular cluster? The Milky Way has about 150
A globular cluster is a spherical collection of stars orbiting in the halo of spiral galaxies. Our own Milky Way galaxy has over 150 globular clusters.
August 14, 2026
Human World
Today's Image
Total solar eclipse August 12, 2026: Best images
Total solar eclipse August 12! Whether you saw it or not from your location, you can experience it! See the best images from our community here.
August 12, 2026
Astronomy Essentials
Total solar eclipse August 12: EarthSky livestream and more
The Arctic, Greenland, Iceland and Spain will have a total solar eclipse on August 12, 2026. Parts of Europe and North America will see a partial.
August 12, 2026
Astronomy Essentials
Will you see the Jupiter-Mercury conjunction on August 15?
A conjunction is when 2 objects share the same right ascension. The Jupiter-Mercury conjunction on August 15 is the next one. Look for them before sunrise.
August 12, 2026
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