On Jan. 15, 2025, the Gaia spacecraft took its last image. Then the craft ran a final round of engineering tests, fired its ...

The interstellar comet 3I/ATLAS has swung back into view after passing behind the Sun, and its return is proving even ...

Earth reaches its closest point to the sun in its 2026 orbit on Jan. 3. The sun will appear larger in the sky than on any ...

Here's how the astronomical phenomenon influences our planet—from the length of our seasons to the way Earth moves through ...

While most planets that we are familiar with stick relatively close to their host star in a predictable orbit, some planets ...