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The mass of a star is determined from binary star systems
Binary stars - a star system consisting of two stars - are extremely useful. They give all the information needed to measure mass of a star. Here is how.
January 31, 2025
Is social media polarization about to get worse?
Social media behemoth Meta is planning to use crowdsourced 'community notes' for factchecking. Some experts worry this will only increase online polarization.
January 19, 2025
Do aliens exist? What scientists really think
Aliens probably exist according to a survey of more than 1,000 scientists. Nearly 87% of them believe in extraterrestrial life.
January 19, 2025
Starship explodes minutes after launch, planes diverted
SpaceX mission launched its newly upgraded Starship late Thursday, but the ship exploded minutes after launch. No crew was aboard.
January 17, 2025
This Is Wildfire: Tips on preparing yourself and your home
The book "This Is Wildfire" explains why wildfires seem larger and more destructive. Find tips on preparing yourself, your home and your community for wildfire.
January 11, 2025
Animal spies: The world’s most bizarre secret weapons
Governments have long relied on animal spies for covert operations, enlisting pigeons, cats and, recently, a beluga whale.
January 5, 2025
Equatorial plasma bubbles and their effect on air travel
Equatorial plasma bubbles are pockets of low density in the Earth's ionosphere in regions around the equator. They pose risks to aviation. Read more.
January 3, 2025
When you wish upon a star, is it already dead?
Some cynics say that when you wish upon a star, that star is already dead. But don't listen to them! The stars you can see, and your dreams, are perfectly safe.
January 2, 2025
Wild weather: Best satellite imagery of 2024
Enjoy our 12 favorite pieces of satellite imagery from the past year, from historic hurricanes to a total solar eclipse. Thank you, GOES satellites!
December 23, 2024
Personal solstices from the EarthSky community
Some people like to mark the solstice with a special sunset view, or marking of shadows, or party! Personal solstices from the EarthSky community, here.
December 20, 2024
