Mercury takes only 88 Earth days to orbit the sun.

Earth reaches perihelion this morning at 8 A.M. EST, when our planet's not-quite-circular orbit brings us to our closest point to the Sun for the year. On this day, we are just 91.4 million miles ...

In contrast, the term "aphelion" refers to the point where the orbiting body is farthest from the sun. Earth will reach its closest point to the sun, known as perihelion, on Jan. 3, 2026 at 12:15 ...

New photos of comet C/2024 G3 (ATLAS) suggest that it could be disintegrating due to "thermal stress" from its recent slingshot around the sun. However, its fate is still unclear.

First spotted last month by a telescope in Chile, the near-Earth asteroid — designated 2024 YR4 — is estimated to be 130 to 330 feet (40 to 100 meters) across.

Researchers at the Chinese Academy of Sciences (CAS) aim to safely replicate the sun’s nuclear fusion processes here on Earth ... s recent achievement came close at 108 million degrees Celsius ...

This might not sound that close, but Nasa's Nicola Fox puts it into perspective: "We are 93 million miles away from the Sun, so if I put the Sun and the Earth one metre apart, Parker Solar Probe ...

But of these planets, which is nearest to the sun ... Because Mercury rotates so slowly — once every 58 Earth days — in some places, the sun can appear overhead for weeks at a time.