Itokawa is the 1st asteroid from which samples were obtained and returned to Earth. From these samples, scientists have figured out Itokawa's true age and geologic history.
Asteroid 2018 RC will sweep past at about half the moon's distance during the night of September 8, according to clocks in the Americas. Learn how to see it online.
As wide as 2 Earths - like nothing seen on any other world - Saturn's hexagon was thought to be a feature of the lower atmosphere, where Saturn's weather happens. Now there's evidence it extends high above the cloudtops.
The legendary craft that flew past Pluto in 2015 is still heading outward. New Horizons will sweep past its next target, nicknamed Ultima Thule, on New Year's Day, 2019.
Dyson spheres are hypothetical megastructures built by extraterrestrials for the purpose of harvesting all of a star's energy. Here's how the European Space Agency's Gaia mission might help find one.
When 2 extremely dense neutron stars orbit each other closely, they spiral inward over time and eventually merge. Such mergers are powerful. Could advanced civilizations be using them to signal across the cosmos?
Astronomers made the sharpest and clearest map yet of a distant starburst galaxy, where stars form 1,000 times faster than in our Milky Way. They're now calling this galaxy an "unstoppable monster."
The lander for Hayabusa2 mission at asteroid Ryugu is due to touch down on October 3. Now the site has been chosen! This Japanese mission will collect samples from the asteroid and bring them back to Earth.