Astronomers
Scientists Thought All Galaxies Had Dark Matter, but They Just Found One Without It
The find defies the assumption that the mysterious matter is necessary for galaxy formation
70,000 Years Ago, a Passing Star Shook Up Our Solar System
The red dwarf likely came within one light-year of the sun, altering the course of some asteroids and comets
How It All Began: A Colleague Reflects On the Remarkable Life of Stephen Hawking
The physicist probed the mysteries of black holes, expanded our understanding of the universe and captured the world's imagination, says Martin Rees
Purple Haze: Alien Atmospheres Recreated In the Lab
By combining various gases with plasma, researchers are learning about the haze around distant planets
Astronomers May Have Just Detected the Universe's First Stars
A long-sought radio signal indicates the first stars began burning 180 million years after the initial Big Bang
Astronomers Spot Signs of Planets Outside the Milky Way
Researchers estimate that more than a trillion planets may lurk beyond our galaxy's bounds
Astronomers Get Best Look Yet at the Surface of a Red Giant Star
The image shows convection cells on the star are huge, confirming some theories about star evolution
Amateur Astronomer Finds Long-Lost NASA Satellite
The hobbyist was in search of the lost Zuma satellite when he spotted IMAGE, which went offline in 2005
Behold Hubble's Best Image of a Distant Galaxy Yet
The galaxy is roughly 13.3 billion light years away, and formed just 500 million years after the universe began
Citizen Scientists Discover an Unusual Five-Planet Solar System
Users looking through data on Exoplanet Explorers flagged four sub-Neptune planets orbiting a distant star called K2-138
Take a Breathtaking Trip Through the Orion Nebula in NASA's New Video
Combining visible and infrared imagery, the new video takes viewers deep into the star nursery
New Clues to the Origins of the Mysterious Fast Radio Bursts From Space
New analysis suggests that the bursts originate near massive black holes or neutron stars
Meet the Newly Named 86 Stars of the Night Sky
The new names are drawn from China, Australia, South Africa, Maya, Polynesian and Coptic traditions
Dinosaurs Were Around Before Saturn Had Rings
Data from the Cassini space probe suggests that the rings may be as young as 150 million years old
The First Interstellar Object Seen Buzzing by Earth Is Pretty Weird
Roughly the size of a football field, the object is roughly 10 times longer than it is wide
Leonid Meteor Shower Will Streak Through Skies This Weekend
Expect 10 to 25 shooting stars per hour as the planet passes through the debris of comet Tempel-Tuttle
Astronomers Spot One of the Oldest Galaxies in the Universe
The dusty, star-forming galaxy is 12.8 billion years old
Jupiter's Auroras Are Surprisingly Out of Sync
X-ray bursts from the poles are expected to line up, but the south is regular while the north produces haphazard bursts
Look Up: The Orionid Meteor Shower Will Streak Through Skies This Weekend
Bits of Halley's Comet are raining down on Earth, and the show will peak in the wee hours of Saturday morning
Scientists Spot the Spark From Ancient Collision of Neutron Stars
The chirp and flash from the event offers clues to the origin of Earth's precious metals
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