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The European Space Agency’s ExoMars Trace Gas Orbiter captured images of 3I/ATLAS on October 3.

A Rare Interstellar Comet Just Flew by Mars—Here Are the Photos Captured by an Orbiting Spacecraft

The images offer the closest view yet of comet 3I/ATLAS, famous for being only the third known interstellar object to pass through our solar system

Comet C/2025 A6 (Lemmon) moves closer to the sun, as captured on October 2.

Here’s How to See Two Comets and a Meteor Shower Light Up the Sky This Month

Skywatchers are anticipating prime viewing conditions for an annual showing of shooting stars and two comet flybys

The three missions launched on a SpaceX Falcon 9 rocket the morning of September 24.

‘Ultimate Cosmic Carpool’ Sends Three New Missions to Monitor Space Weather and the Protective Bubble Around Our Solar System

The spacecraft will map the boundaries of the heliosphere, study how Earth’s outer atmosphere reacts to solar activity and provide continuous monitoring of space weather

A coronal mass ejection erupts from the sun in 2013.

How Prepared Are We for a Rare and Powerful Solar Event?

A coronal mass ejection could knock out power and disrupt communication on Earth

A solar flare with the Earth for scale.

Solar Flares May Be Way Hotter Than Researchers Previously Thought

Scientists recalculated the temperature of solar flares using modern data and new models

The Hubble Space Telescope captured this image of 3I/ATLAS with its Wide Field Camera 3.

Telescopes Reveal Surprising Chemistry of a Rare Interstellar Object Passing Through Our Solar System

Called 3I/ATLAS, the object is only the third of its kind known to astronomers, and it’s likely been heading our way for billions of years, carrying pristine material from another star system

Colorful umbrellas protect beachgoers from the glaring sun on a day when most seemingly opted to stay somewhere cooler.

Get a Dose of Sun, Sand and Sea With These 20 Scenes From the Beach

These highlights from the Smithsonian Magazine Photo Contest are sure to remind you of everything you love about the shore

Researchers used a laser to superheat a sample of gold past its theoretical limit and directly measured its temperature.

Physicists Superheated Gold to Hotter Than the Sun’s Surface and Disproved a 40-Year-Old Idea

A thin piece of gold reached 33,740 degrees Fahrenheit, which is more than 14 times higher than its melting point, by being rapidly heated—and it didn’t melt

Concentric star trails glow behind a single dragon's blood tree, an otherworldly species native to Yemen's Socotra island.

Check Out Ten Spectacular Space Images From the Astronomy Photographer of the Year Contest

The annual competition for professional and amateur astrophotographers released its shortlisted images, which capture the beauty of the cosmos seen from Earth

The comet 3I/ATLAS moves against a backdrop of stars. The ATLAS survey telescope in Rio Hurtado, Chile, was the first to report that the object came from interstellar space.

A Rare Interstellar Object Is Blazing Through Our Solar System, Marking Only the Third Cosmic Visitor on Record

The comet follows just two other deep space objects documented by astronomers in 2017 and 2019

The sun’s corona on May 23, 2025, as imaged by the ASPIICS coronagraph aboard Proba-3. The hair-like structures appeared with the help of an image processing algorithm.

See the Beauty of an Artificial Solar Eclipse, Created With a First-of-Its-Kind, ‘Perfect’ Satellite Formation

Two satellites’ highly precise alignment allows scientists to study the sun’s outer atmosphere like never before

The Solar Orbiter has captured the first-ever views of the sun's south pole.

See the First-Ever Direct Images of the Sun’s South Pole, Captured by the Solar Orbiter Spacecraft

The spacecraft’s tilted orbit will allow scientists to investigate the mechanisms behind space weather that impact crucial human activity on Earth

A full moon on June 28, 2018, as seen from Manchester, England. The reddish glow is likely due to the 2018 Saddleworth Moor wildfires. 

Catch This Year’s Strawberry Moon Lighting Up the Sky on June 11

The last full moon before summer kicks off is one of the lowest of the year in the Northern Hemisphere

In this 2012 visualization, the Andromeda galaxy (left) appears in Earth's skies and begins to distort the Milky Way as the two galaxies merge. This hypothetical scenario was previously expected to play out billions of years in the future—now, astronomers say it might not be inevitable.

Our Milky Way Might Not Crash Into the Andromeda Galaxy After All—New Simulations Suggest a 50-50 Chance of Merging

Scientists previously predicted the pair of galaxies would merge in about five billion years. Now, research suggests that outcome is less certain than thought

Scientists captured the highest-resolution images of the sun’s corona to date. The plasma is artificially colorized in the image, with darker pink colors corresponding to brighter light.

See the Highest-Resolution Views of the Sun’s Corona, as Wisps of Plasma Dance in Crystal Clear Detail

Astronomers have captured videos of the sun without the typical blur caused by turbulence in Earth’s atmosphere

NASA’s Solar Dynamics Observatory (SDO) captured this image of extreme solar activity on May 10, 2024.

The U.S. Ran Its First Space Weather Preparedness Drill—Here’s How It Went

Ironically, the exercise last May was interrupted by a real scenario, when Earth was hit by the strongest solar storm in two decades

The sun launched a powerful solar flare on May 14, 2025, captured here by NASA’s Solar Dynamics Observatory.

Sun Launches Its Strongest Solar Flare of the Year So Far, Causing Radio Blackouts Around the World

The new sunspot responsible for this powerful blast is rotating into view, which could bring more solar activity—and potential aurora-causing coronal mass ejections—to Earth in the coming days

The first image in visible light of green auroras on Mars (left), compared to the night sky of Mars without auroras.

See the First Visible Auroras Captured on Mars, Glowing a Hazy Green Above the Planet

Scientists directed NASA’s Perseverance rover to take an image of the Martian sky after a solar storm in hopes that an aurora would show up

These observations of Jupiter’s auroras (shown on the left of the above image) were captured with NASA's James Webb Space Telescope’s Near-Infrared Camera on December 25, 2023.

Check Out Jupiter’s Stunning Auroras, Which Are Hundreds of Times Brighter Than Earth’s, in the James Webb Telescope’s Latest Images

The infrared views, captured in 2023, shed light on the giant planet’s atmosphere and magnetosphere—but they also reveal something unexpected

Workers prepare Venera 4, a Soviet space probe, for its flight to Venus' atmosphere in 1967.

A Soviet Spacecraft Is About to Crash Back to Earth After Being Stuck in Orbit for 53 Years

The Cosmos 482 lander was intended to reach Venus, but it has instead been circling Earth since 1972

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