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Top 6 favorite EarthSky videos from 2025. Watch them here!
Here are our top 6 favorite EarthSky videos from 2025. What will we share in 2026? Visit YouTube.com/@EarthSky to find out!
December 23, 2025
What was the Christmas star? Science and mystery
What was the Christmas star? Some scientific explanations attempt to explain the Star of Bethlehem, including a planetary conjunction, comet or supernova.
December 21, 2025
December has the longest days (wherever you live)
The longest days accompany the winter solstice. In December, a day - a whole cycle of day and night - is about half a minute longer than the average 24 hours.
December 18, 2025
Forms of aurora: Arcs, curtains, coronas and more
Here are some of the forms of aurora that you might see. Some are more common, such as diffuse glows, while others are a sign of a big geomagnetic storm.
December 14, 2025
Mysterious 3200 Phaethon is the Geminids’ parent object
3200 Phaethon is the weird comet-like asteroid that spawns the Geminid meteor shower. New research reveals more answers ... and questions.
December 12, 2025
Thinking of buying a telescope? Read these tips 1st
Are you thinking of buying a telescope? Here's how to know if you're ready, with tips on what 1st-time buyers should look for.
December 9, 2025
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
