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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.

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.

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.

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.

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.

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.

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.

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 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!

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.