An alien comet, a Martian volcano, a man’s fall from the sun and a groundbreaking telescope’s first images: Here are the most jaw-dropping space photos of 2025.

Comet C/2025 R2 (SWAN)'s backdrop is dominated by the Eagle Nebula — a vast cosmic structure of dust and hydrogen-rich gas that glows with its own light, having been ionized by the radiation emitted ...

Comet 3I/ATLAS was discovered on July 1, 2025, by the NASA-funded ATLAS telescope in Rio Hurtado, Chile and was quickly ...

NASA has pinpointed the exact moment when interstellar comet 3I/ATLAS, the object suspected to be an alien spacecraft, made ...

Each Monday, I pick out North America’s celestial highlights for the week ahead (which also apply to mid-northern latitudes ...

While the comet will remain visible to telescopes for several months, tonight marks the moment it is nearest to Earth, making ...

Discovered over the summer, the comet known as 3I/Atlas will pass within 167 million miles (269 million kilometers) of our ...

Scientists atop Mauna Kea on the Island of Hawai’i and across the Hawaiian chain are turning their telescopes skyward Friday ...

While the 21st century has been bumpy, it has also ushered in monumental scientific and technological breakthroughs that have ...

The interstellar comet 3I/ATLAS reaches its closest point to Earth on Dec. 19, allowing close study with no threat to the planet.

A satellite photo from July shows intricate snowy stripes painted across the Atacama Desert in Chile. The icy weather temporarily put the Atacama Large Millimeter/submillimeter Array (ALMA) ...

The interstellar comet 3I/ATLAS will make its closest approach to Earth on Friday, December 19, as it continues to hurtle ...