Comet 3I/ATLAS will get closest to Earth on Dec. 19, and astronomers will be watching.

Even the best telescopes can’t see exoplanets. It’s all about watching for jiggly stars, blue shifts, and transits.

A rocky exoplanet outside the Earth's solar system may have an atmosphere, according to new evidence gathered by NASA ...

All over the country, cities and towns are going all out for next year’s semiquincentennial party. Here are our 9 picks for where to go—and how to start celebrating now. Cities and towns all over the ...

The increases come as more and more international travelers are choosing to stay away from the United States and amid turmoil at the National Park Service. By Chris Cameron and Maxine Joselow ...

International tourists visiting popular national parks in the US next year will be required to pay additional fees and raised rates on annual passes, the US Department of the Interior announced ...

A pair of major North American solar companies, including one touted by Senate Democrats in 2023, could face scrutiny over their ties to China. While the feds have created barriers to Chinese firms ...

New measurements of radio galaxies reveal that the solar system is racing through the universe at over three times the speed predicted by standard cosmology. Using highly sensitive data from multiple ...

About 4.5 billion years ago, the most momentous event in the history of Earth occurred: a huge celestial body called Theia collided with the young Earth. How the collision unfolded and what exactly ...

NASA’s Goddard Space Flight Center shared the images of comet 3I/ATLAS. It's possibly as big as Manhattan, likely older than our own solar system and it's traveling through space at speeds of up to ...

As 2025 inches towards its end, National Geographic is celebrating the year by dropping its annual Pictures of the Year 2025, “highlighting the images that most inspired and defined the past year ...

Each year, National Geographic highlights a collection of the most compelling images captured by Nat Geo photographers over the past 12 months in their "Pictures of the Year." For 2025, Nat Geo ...