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

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 ...

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 ...

As the year gets underway, something important happens quietly in space while life on Earth carries on as usual. Our planet ...

In the bigger picture, "down" could be defined as being below the plane of the solar system, which is known as the ecliptic.

At the start of the year, Earth will quietly reach a milestone in its orbit around the sun. Known as perihelion, this is the moment when our planet is closer to the sun than at any other point in the ...

It may be surprising to many that the Earth is closest to the Sun in January, while at the same time, much of the Northern Hemisphere experiences cold weather. This is because Earth's seasons are ...

At half the size of Earth and one-tenth its mass, Mars is a featherweight as far as planets go. Yet new research reveals the ...