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 ...

Perihelion is when a planet or celestial body reaches its closest point to the Sun in its orbit.

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 ...

The team analyzed borehole data from several wells using natural gamma-ray logs, core observations, and geochemical ...

Scientists studying Jurassic rocks in China found that cyclical changes in Earth's orbit affected not only the climate, but ...

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