Every year in early January, Earth reaches the closest point in its orbit to the Sun, a moment astronomers call perihelion.

There are eight planets in the solar system, and each travels on its own path around the sun. But of these planets, which is nearest to the sun? Mercury is a strange little world. There are some ...

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

Each year, Earth reaches its closest point to the sun in early January, a moment called perihelion. In 2026, this occurred on ...