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Jupiter’s moons: How to see and enjoy them
November and December 2025 are great months for seeing Jupiter's moons Io, Europa, Ganymede and Callisto with binoculars or a small telescope.
December 7, 2025
The last full supermoon of 2025. Best pics here!
The full Cold Moon on December 4 was the last supermoon of 2025. See a gallery of photos of the last full supermoon from the EarthSky community here.
December 5, 2025
Does a supermoon have a super effect on us?
The extra pull of gravity from a supermoon creates higher-than-usual tides. But the effects of a supermoon on a human body are imperceptible.
December 1, 2025
A peek inside Webb’s Cosmos, in media we love
"Webb's Cosmos" is a new coffee-table book displaying some of Webb's greatest images. Learn more about the book and get a peek inside here.
November 28, 2025
What’s a red dwarf? Only the most abundant Milky Way star
A red dwarf star is the smallest and coolest type of star known. They're also extremely common, making up around 75% of the stars in the Milky Way.
November 19, 2025
Super Hunter’s Moon – 2025’s brightest full moon – on November 5-6
Watch for the Super Hunter's Moon - this year's November full moon - on November 5-6, 2025. It's the closest and brightest supermoon of 2025.
November 5, 2025
The year’s earliest solar noon is on November 3
November 3 brings the year's earliest solar noon - that is, earliest midday - by nature's clock. It's a harbinger of the Northern Hemisphere's earliest sunset.
November 2, 2025
Halloween is an astronomy holiday. It’s a cross-quarter day
A cross-quarter day falls between an equinox and a solstice. Halloween is the year's 4th cross-quarter day and the spookiest of them all.
October 31, 2025
Double stars: How to find, observe and enjoy them
This observing guide gives you a range of choices for seeing double stars with your eyes alone, with binoculars or with a telescope. And some are easy to find.
October 26, 2025
Proxima Centauri, the closest star to our sun
Proxima Centauri is the nearest star to our sun at 4.22 light-years away. It's home to at least 3 planets and has massive solar flares.
October 22, 2025
