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How to watch a 'potentially hazardous' asteroid the size of Earth's tallest building zoom past the planet Sunday
By Brandon Specktor published
A large, skyscraper-size asteroid will pass close to Earth Sunday night (June 11), missing our planet by a few million miles.
Largest explosion since the Big Bang was powered by a bizarre energy jet unlike any other
By Robert Lea published
The enormous gamma-ray burst, called the Brightest Of All Time (or BOAT), may be powered by its strange jet structure, scientists say.
1st mission to 'touch' the sun discovers a mysterious source of solar wind
By Ben Turner published
NASA's Parker Solar Probe plunged into the sun's atmosphere to capture the granular details of how its solar wind is made.
What is a light-year?
By Jesse Emspak last updated
A light-year is a measure of the distance it takes light to travel through interstellar space over the course of a year.
These Celestron SkyMaster Binoculars are under $130 at Amazon
By Lloyd Coombes published
Save over $70 on these Celestron SkyMaster 20x80 binoculars that are tailor-made for stargazing.
Flare of light brighter than a trillion suns reveals location of rare double black hole galaxy
By Stephanie Pappas published
Brilliant new signals from a far-off galaxy confirm that the system is anchored by a pair of black holes locked in a daring dance.
Enormous structure discovered near doomed galaxy group is the longest galactic 'tail' ever seen
By Joanna Thompson published
The 1.5-million-light-year-long gas trail was caused by a group of galaxies moving 3 million miles per hour
Dying stars build humongous 'cocoons' that shake the fabric of space-time
By Briley Lewis published
New simulations show that dying stars release enormous "cocoons" of gas that may rattle with space-time ripples called gravitational waves.
James Webb Space Telescope discovers oldest organic molecules in the known universe, 12 billion light-years from Earth
By Joanna Thompson published
Astronomers using the James Webb Space Telescope discovered evidence of complex organic molecules in a galaxy 12.3 billion light-years away — the furthest and oldest ever detected.
Ethereal 'halo' and light arcs around the sun captured in photos of ultra-rare phenomena
By Harry Baker published
At least three separate optical phenomena are visible in the new images. Each of which is created by light refracting through millions of perfectly aligned ice crystals in the upper atmosphere.
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