Center for Astrophysics, Harvard and Smithsonian
Earth Is Getting a New 'Mini Moon' for the Next Two Months, Astronomers Say
A roughly 33-foot-long asteroid called 2024 PT5 will chart a horseshoe-like path around our planet
Mysterious 'Wow!' Radio Signal Might Finally Have an Explanation—and No, It's Not Aliens
The infamous signal recorded in 1977 might have been a laser-like beam of radiation from a hydrogen cloud energized by a powerful, magnetic star, preliminary research suggests
See 25 Stunning Images of the Cosmos From the Chandra X-Ray Observatory as It Celebrates 25 Years in Space
Chandra, the world’s most powerful X-ray telescope, has been peering at black holes, stellar explosions and dark energy for a quarter-century
ISS Astronauts Forced to Briefly Take Shelter as Russian Satellite Suddenly Breaks Up in Orbit
Officials are unsure why the satellite fractured unexpectedly, splintering into nearly 200 pieces
This Giant Cosmic 'Butterfly' Is a Planet-Forming Disk
New research has confirmed that the celestial object may be the biggest of its kind ever found
Where Do We Get Seeds for Seedless Fruit? And More Questions From Our Readers
You’ve got questions. We’ve got experts
Falling Object That Crashed Into Florida Home May Be Debris From the International Space Station
Nobody was hurt by the mysterious, two-pound object, but experts speculate it may be a piece of batteries ejected from the station in 2021
Astronomers Capture Dazzling New Image of the Black Hole at the Milky Way's Center
The first image of the black hole taken in polarized light, the new view shows the supermassive structure's magnetic fields and hints that it could be hiding an enormous jet
Smithsonian Scholars Recommend Their Favorite Books of 2023
Curators and staffers satisfied their endless curiosity with novels, short stories, biographies, art collections and journalistic reporting
Listen to the Center of the Milky Way Translated Into Sound
A new musical composition represents data from three NASA telescopes as a piece that was performed by an orchestral ensemble
Astronomers Spot the Oldest Black Hole Ever Seen, Shedding Light on the Early Universe
Dating to just 470 million years after the Big Bang, the ancient cosmic structure could help researchers understand how the first black holes formed
The Asteroid Hit by NASA Seems to Be Moving Strangely, High School Students Find
After the DART spacecraft made contact with Dimorphos last year, the space rock's orbit is declining more than expected, according to preliminary research
New Satellite Tracking Air Pollution Releases Its First Images
The instrument, called TEMPO, will make hourly measurements of pollutants over North America that could help reduce exposure to unhealthy air
Neptune's Clouds Have Disappeared, and the Sun Might Be Responsible
Scientists have linked shifts in the distant planet's cloud coverage to the ever-oscillating solar cycle, which is due to peak soon
Newly Discovered Exoplanet May Be Covered in Volcanoes
Astronomers found an Earth-sized world that could have liquid water on its surface and may be able to support life
Saturn May Have Just Won the 'Moon Race' With 62 More Discovered
It will likely reign supreme as our solar system's planet with the most moons from now on, astronomers say
How to Watch the Spectacular Lyrid Meteor Shower
One of the oldest recorded annual showers, the Lyrids will peak on April 22
Why It’s Time for a Worldwide Lights-Out Program
A new Smithsonian exhibition delves into the issue of light pollution, with easy solutions offering an immediate change
This Eye in the Sky Promises Major Insights Into the Air We Breathe
The satellite mission TEMPO will detect pollutants at a neighborhood scale across the nation
Burning Space Junk Creates Mysterious Lights in California Sky
Bright streaks observed Friday were jettisoned equipment from the International Space Station re-entering Earth’s atmosphere
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