Sun
'It Wasn't Aliens': Solar Observatory That Was Mysteriously Evacuated Will Reopen Tomorrow
The Sunspot Observatory in New Mexico was closed for ten days due to a 'security threat,' though aliens and solar flares have been ruled out
STEVE the Purple Beam of Light Is Not An Aurora After All
In a second study of mysterious phenomena, researchers discovered that solar particles hitting the ionosphere do not power the violet, vertical streaks
Many Roman Children Suffered From Vitamin D Deficiency
New research suggests rickets was common long before the Industrial Revolution, when pollution blocked out sunlight
Behind the Scenes With the Spacecraft That Will Soar Through the Sun's Atmosphere
The probe, which launches Sunday, will attempt to solve enduring mysteries about the sun
Is the Mysterious Planet Nine Just a Swarm of Asteroids?
Researchers investigate alternative explanations for wacky orbits of objects in our solar system
Could This Low-Cost Device Provide Clean Drinking Water To Those In Need?
Engineers have created an upgraded solar still that uses carbon paper and the sun to purify water at an unprecedented rate
The Sun Will Produce a Beautiful Planetary Nebula When It Dies
A new model of stellar death shows our low-mass star has enough juice to produce a beautiful ring of gas and dust before winking out
New Star Map Could Change Everything We Know About the Milky Way
The map includes 1.7 billion stars and is already revealing new details about star evolution and the formation of our galaxy
Diamonds Trapped in Strange Meteorite Came From Solar System's Earliest Planets
Impurities in the diamonds could only have formed within a planet the size of Mercury or Mars
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
Earthlings: There's No Need to Freak Out About Tonight's Solar Storm
Expect small disruptions to satellite communications and minor surges in the power grid. Find out how USGS predicts effects of geomagnetic storms
Get a "Hot Ticket" to Send Your Name to the Sun
Sign up to have your name placed on a microchip that will travel on board the Parker Solar Probe
Is the Fall Equinox the Secret to the Pyramids' Near-Perfect Alignment?
One engineer says yes
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
How the Sun Illuminates Spanish Missions On the Winter Solstice
Today, the rising sun shines on altars and other religious objects at many Spanish churches in the U.S. and Latin America
This 1940s Solar House Powered Innovation and Women in STEM
As far back as the 1940s, people were worried about running out of fuel. The sun seemed like a feasible alternative
Using 18th-Century Writings and Illustrations, Scientists Model an Ancient Magnetic Storm
The vibrant aurora lit up the night sky over the city of Kyoto, Japan, some 250 years ago
Could a Magnetic Shield Protect Earth From Space Weather?
A bad geomagnetic storm would fry the electric grid and cripple civilization for years—a space shield is cheap by comparison
NASA Captures Strongest Solar Flare in a Decade
This morning, the sun emitted two X-class flares, disrupting GPS and radio signals
Stunning Photos Capture the Solar Eclipse Across America
This stellar phenomenon delighted millions today as it transited across the United States
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