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See the 'comet of the century' light up the night sky in breathtaking photos
By Brett Tingley published
Comet A3 Tsuchinshan-ATLAS proved to be photogenic as it lit up the early autumn skies of the Northern Hemisphere this month.
Supergiant star Betelgeuse may have a 'Betelbuddy'
By Samantha Mathewson published
The supergiant star Betelgeuse may have a companion star that pushes light-blocking dust out of the way, causing the irregular changes observed in the star's brightness.
Scientists have dated the moon's oldest, and largest, impact site
By Stefanie Waldek published
The moon has been bombarded by asteroids and comets for more than 4.32 billion years.
How does the Cosmic Web connect Taylor Swift and the last line of your 'celestial address?'
By Robert Lea published
A map of gravity wells or "basins of attraction" in the local universe may resemble a Taylor Swift outfit, but they define the largest structure in the universe, the last line of your cosmic address.
Comet Tsuchinshan-ATLAS is a Halloween visitor from the spooky Oort Cloud − the invisible bubble that's home to countless space objects
By James Wray published
The cloud is basically a gigantic reservoir that may hold billions of icy celestial bodies. Two of those bodies will pass by Earth in the days leading up to Halloween.
NASA peers into the blistering hot plasma swirling around 12 black holes
By Conor Feehly published
Stellar-mass and supermassive black hole coronas have some similarities, and this is great news for black hole physicists.
The Pluto problem: Is it time to rethink our definition of a planet?
By Paul Sutter published
In 2006, the International Astronomical Union (IAU) famously demoted Pluto to a dwarf planet. Things have been a bit of a mess since then — so is it time to redefine the planet?
What happens when black holes merge?
By Paul Sutter published
Space mysteries Black hole mergers are beautiful — and some of the most violent events in the cosmos. Here's how the process unfolds.
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