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Posts by
Editors of EarthSky
Artemis 1: Another launch delay for Tropical Storm Ian
Tropical Storm Ian has forced another delay for NASA's Artemis mission. In the next 24 hours, the team will determine if they will rollback.
September 24, 2022
Meteor shower guide: Next up, autumn meteors
Your meteor shower guide for 2022 and early 2023. There are some good ones! Next up ... the Draconids and the Orionids in October.
September 7, 2022
How to see and enjoy Jupiter’s moons
You can see Jupiter's moons - Io, Europa, Ganymede and Callisto, known as the Galilean satellites - with the help of binoculars or a small telescope.
September 6, 2022
Pioneer 11 swept past Saturn 43 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, 2022
Mercury after sunset: Greatest elongation today
Mercury is currently visible in the evening. Look in the sunset direction, as the sky is darkening. The planet reaches its greatest elongation on August 27, 2022.
August 27, 2022
Return of Sirius signals seasonal change
A sign of the changing season is the return of Sirius before sunup. Want to make sure you've spotted Sirius? The 3 stars in Orion's Belt point to it.
August 25, 2022
Asaph Hall finds Mars moon Phobos 145 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, 2022
Don Machholz, 1952-2022
We are heartbroken to announce the passing of Don Machholz, discoverer of 12 comets. He was also a writer for EarthSky ... and our friend.
August 9, 2022
August birthstone: peridot or sardonyx
The August birthstone can be green, crystalline peridot or colorful, banded sardonyx. Both have long histories. Take your pick, August babies!
August 9, 2022
Can meteors make a sound? Scientists say yes
Is it possible to hear a meteor? Some people report hearing meteors make a sizzling sound. Scientists explain how you can hear a meteor.
August 9, 2022
