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Why are things in space round?
By Donavyn Coffey published
Why are most planets and moons (mostly) spherical?
Tiny galaxies that had their stars stolen could be a 'missing link' in cosmic evolution
By Robert Lea published
More than 100 observed galaxies are being disrupted and stripped of their outer layers, transforming them into fossil-dense, ultra-compact dwarf galaxies.
'Planet killer' asteroids are hiding in the sun's glare. Can we stop them in time?
By Brandon Specktor published
In the glare of the sun, an unknown number of near-Earth asteroids move on unseen orbits. A new generation of space telescopes could be our best defense against potential disaster.
The sun may be smaller than we thought
By Stephanie Pappas published
New calculations suggest the sun is a few fractions of a percent smaller than previously estimated, and that could change how we study it.
NASA's most wanted: The 5 most dangerous asteroids in the solar system
By Robert Lea published
What asteroids pose the greatest risk of hitting Earth, how probable is an impact, and how much destructive power would such collisions have?
Could scientists stop a 'planet killer' asteroid from hitting Earth?
By Brandon Specktor published
If a mile-wide asteroid is discovered hurtling toward Earth, our survival might depend on launching 1,000 spacecraft — or one well-placed nuke.
Space photo of the week: James Webb telescope finds a secret at the Crab Nebula's heart
By Jamie Carter published
The James Webb Space Telescope has revealed the most detailed image so far of the Crab Nebula, a gorgeous supernova remnant of a star that exploded 1,000 years ago.
Oxygen detected in Venus' hellish atmosphere
By Joanna Thompson published
In a first, researchers discovered oxygen atoms on the dayside and nightside of Venus' atmosphere.
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