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What’s a constellation? What’s an asterism?
Constellations and asterisms are patterns of stars. Some asterisms consist of stars from different constellations, and some are part of one constellation.
March 3, 2024
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.
March 1, 2024
Binoculars for stargazing: Our top 6 tips here
Want to know how to use binoculars for stargazing? Follow our top 6 tips to get the most out of viewing the night sky with a little optical aid.
February 29, 2024
Is Sirius the most luminous star in the sky?
Sirius is the brightest star in Earth's sky because of how close it is to us. It's so bright you might see glints of different colors flashing from it.
February 28, 2024
Year’s latest solar noon happens on February 11
February 11 has 2024's latest solar noon by the clock. Solar noon is a natural event, the instant when the sun is at its highest point for the day.
February 11, 2024
The April 8 eclipse is part of Saros 139. What does that mean?
Enjoy the April 8 eclipse as you witness the 30th of 71 member eclipses in the illustrious procession known as Saros 139. Learn more here.
February 8, 2024
What is orbital resonance? A dance between heavenly bodies
What is orbital resonance? It's a precise dance between heavenly bodies when their orbits line up, causing them to have specific synchronicities.
February 6, 2024
Groundhog Day is February 2. Phil says early spring!
It was a chilly 39 degrees F (3.8 C) this morning in Punxsutawney, PA, when Phil predicted an early spring. Happy Groundhog Day!
February 2, 2024
Here’s what ‘habitable’ means to astronomers
When astronomers say a distant world is 'habitable,' what do they mean? Do they mean humans could live there? Do they mean we've discovered alien life?
January 29, 2024
What makes the Harvest Moon special?
The Northern Hemisphere's Harvest Moon falls overnight September 17-18, 2024, or almost 5 days before the September equinox. It's also a supermoon!
January 28, 2024
