Interstellar Comet 3I/ATLAS makes its closest Earth pass early on Dec. 19. Here's what astronomers know about its origin and speed.

Astronomers have been treated to a stunning fireworks display from around a young star called The events, detected in 2004 ...

Interstellar comet 3I/ATLAS makes its closest approach to Earth this week, safely passing at 167m miles. The UN & NASA are ...

All year long, these moments captivated the public, demonstrated dangerous trends, and pushed research and innovation forward ...

It came from outer space. Interstellar space, to be precise. From somewhere beyond the influence of our sun, possibly from ...

NASA has now confirmed that 3I/ATLAS is not just another visitor from deep space but the largest interstellar comet ever ...

Then, on November 25, teams at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, joined the inner and outer portions ...

Jared Isaacman, the billionaire nominated twice to lead the agency, may draw some lessons from the tenure of another NASA ...

Oceans hiding within the crusts of distant moons are tantalizing targets for scientists looking for life beyond Earth ...

From an interstellar comet to breathtaking auroras and from brand-new rockets to iconic space telescopes, here are some of our favorite images from the cosmos in 2025 ...

Saturn's giant moon Titan may not have a vast underground ocean after all. New research suggests Titan instead may hold deep layers of ice and slush more akin to Earth's polar seas instead of a buried ...