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Editors of EarthSky
Pioneer 11 swept past Saturn 45 years ago today
Pioneer 11 was the 1st spacecraft to encounter Saturn. A true pioneer, it paved the way for the 2 Voyagers in 1980 and 1981 plus Cassini from 2004 to 2017.
September 1, 2024
Asaph Hall finds Mars moon Phobos 147 years ago today
On this date in 1877, American astronomer Asaph Hall discovered Phobos, the larger of Mars' 2 moons. He discovered the other moon, Deimos, later that year.
August 17, 2024
See it! This week’s auroras and Perseids!
The beloved Perseid meteor shower peaked just as auroras were gracing our skies. Wow! See images from the EarthSky community here.
August 13, 2024
Crepuscular rays are sunrays in twilight skies
Crepuscular rays form around twilight when particles in the atmosphere reflect the sun's light beams toward our eyes. See photos of the phenomenon here.
May 18, 2024
Auroras on May 10-11 wowed millions! Pics here
Auroras last night from "extreme" geomagnetic storming - which came after a week of very high activity on the sun - wowed millions around the globe.
May 16, 2024
How Pluto got its heart
The New Horizons spacecraft saw a heart-shaped feature on Pluto during its 2015 flyby. New computer simulations suggest an impact created Pluto's heart.
April 16, 2024
Use the Big Dipper to find the Little Dipper
Polaris marks the end of the handle of the Little Dipper. The 2 outer stars in the bowl of the Big Dipper point to Polaris and help you find the Little Dipper.
April 14, 2024
Monday’s total solar eclipse from space
Earth-observing satellites captured imagery of the Moon’s shadow as it raced eastward over North America on the April 8, 2024 total solar eclipse.
April 12, 2024
New Horizons finds evidence for 2nd Kuiper Belt
The Pluto spacecraft New Horizons is still alive and speeding outward. Has it found a 2nd Kuiper Belt? The team is hopeful for new spacecraft targets.
April 10, 2024
Total solar eclipse of April 8, 2024. Experience it here!
The April 8, 2024, total solar eclipse crossed Mexico, the U.S. and Canada! Relive it by watching a replay of EarthSky's livestream here.
April 9, 2024
