Most comets, including the well-known Halley's, loop through our solar system like cosmic time capsules that formed alongside ...

The solar system's journey through the galaxy is more complex than most imagine. While we often picture planets orbiting the ...

"This is a big step in understanding the outer solar system," team leader Rosemary Pike from the Center for Astrophysics | ...

After nearly a year of trying to fix the ill-fated spacecraft, NASA says Starliner is set for a cargo mission in 2026.

As NASA continues work to find a fix for the thruster issues that have afflicted Boeing's Starliner astronaut taxi, chances are high that the spacecraft's next mission will be uncrewed.

Twin orbs of superhot plasma at the Milky Way's center known as the "Fermi bubbles" contain inexplicable clouds of cold ...

Comet 31/ATLAS, a rare interstellar object, may be 7 billion years old and could reveal secrets about the early Milky Way and ...

A mystery interstellar object has been identified as the "oldest comet ever seen", according to scientists. The Oxford ...

A mystery interstellar object discovered last week is likely to be the oldest comet ever seen – possibly predating our solar system by more than three billion years, researchers say. The "water ...

I/ATLAS might be over 7 billion years old, a new study reports, which would make it the oldest comet known. But experts caution we need more data.

A newly discovered comet, 3I/ATLAS, may be the most ancient visitor ever detected, potentially older than our solar system ...