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

Add Yahoo as a preferred source to see more of our stories on Google. An artist's concept depicts the NISAR satellite in orbit over central and Northern California. Scientists at the University of ...

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

The annual clock of the seasons—winter, spring, summer, autumn—is often taken as a given. But our new study in Nature, using a new approach for observing seasonal growth cycles from satellites, shows ...

Research suggests that Mars may strongly influence these cycles. For example, Mars helps drive a 2.4‑million‑year cycle ...

Researchers uncover how Mars affects Earth’s orbit, offering new insight into the planetary forces behind ice ages.

Researchers discovered Mars subtly affects Earth’s orbit and axial tilt. These small changes help trigger ice ages and influence global climate cycles consistently over millions of years.