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What’s a Blood Moon? All you need to know
By this definition, Blood Moon is a member of a special kind of lunar tetrad : four total lunar eclipses in a row. Now it's used for any total lunar eclipse.
January 1, 2026
Dwarf planet Ceres discovered 225 years ago today
Dwarf planet Ceres was discovered by Giuseppe Piazzi on January 1, 1801. That was 225 years ago. It was 1st considered an asteroid.
January 1, 2026
How to know your eclipse glasses are safe
Unscrupulous companies are printing ISO certification labels on fake eclipse glasses. Check here for reputable vendors from the American Astronomical Society.
January 1, 2026
Why does the New Year begin on January 1?
Why does the New Year begin on January 1? The tradition stems from the festival of Janus, the Roman god of past and future.
December 31, 2025
Apollo 8 Earthrise photo Christmas Eve 1968
Astronaut William Anders took this iconic photo of Earthrise on the 4th orbit of the moon aboard Apollo 8 on December 24, 1968.
December 24, 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
The Wright brothers succeeded 122 years ago
The Wright brothers made aviation history on December 17, 1903, taking humanity’s 1st powered flight into the skies at Kitty Hawk.
December 17, 2025
Apollo 17 – last human footsteps on the moon – 53 years ago
It's been 53 years since humans last set foot on the moon. The Apollo 17 astronauts left the lunar surface on December 14, 1972.
December 14, 2025
Will we digitize human bodies for healthcare?
What would it be like if we could digitize human bodies? We could recognize heart attacks as they happen and deliver tailored doses of medicine to the sick.
December 5, 2025
Audubon Christmas Bird Count signup has begun
The Audubon Christmas Bird Count, held each winter, is one of the longest-running community science projects. You can help collect important data about birds.
December 5, 2025
