Sun

Charlotte Moore Sitterly made huge strides in our understanding of how atoms are structured and what stars, especially our sun, are made of.

How Charlotte Moore Sitterly Wrote The Encyclopedia of Starlight

The "world’s most honored woman astrophysicist" worked tirelessly for decades to measure the makeup of the sun and the stars

Scientists Find a Tiny Speck of Comet Inside a Meteorite

The little fragment found in Antarctica was protected from the elements and preserves the chemical signature of the early solar system

Exoplanet Core Orbiting a Dying Star May Help Astronomers Understand What Lies in Store for Our Solar System

It's likely the planetesimal orbiting a white dwarf 410 light years away was the core of a minor planet caught in its immense gravity

Raging Rivers May Have Washed Over Mars for Billions of Years

A study of 200 river systems shows the waterways persisted even while the atmosphere was disappearing and the Red Planet was drying up

Scientists Predict Sun Will One Day Turn Into Giant Crystal Ball

New observations of white dwarfs confirm theory that the star remnants transition into solid structures as they cool

Ring in the New Year With Dazzling Total Lunar Eclipse of a Supermoon

The celestial show will be visible on the East Coast around 12:12 a.m. on January 21, 2019

An artist's conception of the view from Farout.

Meet Farout, the Solar System's Most Distant Minor Planet

Observations suggest the object is 300 miles in diameter, pinkish-red and 3.5 times as far away from the sun as Pluto

Corona image from the Parker Solar Probe

Solar Probe Sends Back First Image and Data From the Sun

The Parker Solar Probe survived its first swoop around our star and will get even closer on its next two dozen trips

A mid-level solar flare captured by NASA's Solar Dynamics Observatory in 2017.

Did a Huge Solar Storm Detonate Deep Sea Mines During the Vietnam War?

Dozens of underwater devices seemed to explode without cause in 1972

Portrait of Galileo Galilei (1636) by Justus Sustermans

Newly Discovered Letter Catches Galileo in a 400-Year-Old Lie

Fearing repercussions of his groundbreaking scientific claims, which flew in the face of church doctrine, the famed astronomer fibbed

'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

A STEVE lights up the night over British Columbia.

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

Rickets, a disease caused by vitamin D deficiency that results in skeletal deformities, has been traced back to the Roman Empire.

Many Roman Children Suffered From Vitamin D Deficiency

New research suggests rickets was common long before the Industrial Revolution, when pollution blocked out sunlight

Betsy Congdon, lead engineer for Parker Solar Probe’s heat shield, looks on as technician Tony Ahan attaches the interface plates that will allow the heat shield above them to eventually be installed onto the spacecraft.

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

Illustration of Sedna, a minor planet with an unusual orbit.

Is the Mysterious Planet Nine Just a Swarm of Asteroids?

Researchers investigate alternative explanations for wacky orbits of objects in our solar system

The new water purification technique involves draping a sheet of carbon-dipped paper in an upside-down "V." The paper's bottom edges soak up water, while the carbon coating absorbs solar energy and transforms it into heat for evaporation.

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

Perhaps our sun will produce something as beautiful as the Cat's Eye Nebula.

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

Gaia's all-sky view of our Milky Way Galaxy and neighboring galaxies, based on measurements of nearly 1.7 billion stars.

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

A piece of the Almahata Sitta in Sudan

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

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