Sign Up for Our Amazing Newsletter!
A daily update by email. Science news, great photos, sky alerts.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Posts by
Editors of EarthSky
December full moon is the Cold Moon and a supermoon
The 2025 December full moon will occur on December 4. It's also a supermoon, the last supermoon of 2025. It will look very bright. Don't miss it!
December 3, 2025
EarthSky’s lunar calendar: How to use this great gift!
Follow the moon! Here’s why you need an EarthSky lunar calendar, the top tips for using it and where you can order one.
December 3, 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
Orion the Hunter is back in the evening sky
In November, the famous constellation Orion is back in the evening sky! Its most recognizable feature is its belt of 3 medium-bright stars.
November 25, 2025
Meet Hamal, an ancient equinox star, in Aries the Ram
Meet Hamal, the brightest star in Aries, and learn why people sometimes refer to the March equinox point as the First Point in Aries.
November 18, 2025
See the Summer Triangle in the northern autumn sky
Look west in the evening to see the Summer Triangle in autumn. Its 3 bright stars - Vega, Deneb and Altair - are in 3 different constellations.
November 16, 2025
Amazing aurora photos capture the ‘sky on fire’
Stargazers saw vivid reds and greens paint the sky the night of November 11, 2025, as auroras dipped into southern-US latitudes and beyond. Aurora photos here!
November 12, 2025
Halley’s Comet is Edmond Halley’s namesake. Happy birthday, Edmond!
Astronomer Edmond Halley is famous for predicting the return of the comet that we now know as Halley's Comet. Edmond was born on November 8, 1656.
November 7, 2025
Almach, a quadruple star system in Andromeda
With the eye alone, Almach looks like a single star. Through a telescope, it looks like a colorful duo. But Almach is really a 4-star system.
November 6, 2025
November birthstone: Choose either topaz or citrine
The November birthstone, topaz, comes in lots of colors. It's a much-loved gemstone in jewelry, with myths that date to ancient times. Or choose citrine.
November 2, 2025
