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Posts by
Editors of EarthSky
Uranus discovered by accident on this date in 1781
William Herschel spotted Uranus in 1781 during a routine survey of the stars. It was the 1st new planet found since ancient times.
March 13, 2025
Sirius is a future southern Pole Star
Wait, what? It's true. The sky's brightest star, Sirius aka the Dog Star, will come to within 1.6 degrees of the south celestial pole in the year 66270.
January 30, 2025
Mars closest to Earth on January 12, 2025
The Mars opposition - when Earth flies between the sun and Mars - comes on January 15-16, 2025. But January 12, 2025, finds Mars closest to Earth.
January 12, 2025
Too cold to snow? Do cold temperatures prevent snow?
Can it ever be too cold to snow? The fact is, no matter how cold a snow-producing cloud is, if it has a source of water, it can build big snowflakes.
January 12, 2025
Personal solstices from the EarthSky community
Some people like to mark the solstice with a special sunset view, or marking of shadows, or party! Personal solstices from the EarthSky community, here.
December 20, 2024
Comets are icy balls of gas, dust and rock
Comets are diffuse balls of ice and dust orbiting the sun. They're sometimes visible in our skies. A comet's tail can stretch millions of miles across space.
November 28, 2024
See Orion’s Belt as a celestial bridge between hemispheres
Many know Orion's Belt, a short, straight row of 3 stars. Orion's Belt is considered a celestial bridge between the sky's Northern and Southern Hemispheres.
November 13, 2024
Annular solar eclipse today! See a ring of fire
Today, an annular solar eclipse will cross over parts of South America, the Pacific Ocean, the Atlantic Ocean, and Antarctica. Watch a livestream here.
October 2, 2024
LIVE MONDAY: SpaceX and Space Race 2.0 with Eric Berger
Join EarthSky's Dave Adalian LIVE at 12:15 p.m. central (17:15 UTC) on September 30. He'll be chatting with Eric Berger, senior space editor at Ars Technica.
September 30, 2024
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
