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

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

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

The object, the latest “quasi-moon” detected by astronomers, could be with us for almost another 60 years. By Robin George Andrews The Earth stands alone in the solar system as a habitable world, as ...