Clocks on Mars tick faster by about 477 microseconds each Earth day, a new study suggests. This difference is significantly ...

When is winter? Weather forecasters in the Northern Hemisphere will tell you Dec. 1 through the end of February, which is ...

Perihelion is the point at which an orbiting body is closest to the sun. The word comes from Greek and literally means around (peri) the sun (helios).

The stealthy startup plans to use a network of satellites to harvest sunlight and send it to Earth using infrared lasers.

Earth's climate has swung between ice ages and warmer periods for millions of years, driven by subtle changes in our planet's ...

EPA has scrubbed references to people’s contribution to rising temperatures from some of its climate change webpages. The ...

Orbital solar power faces a $20 billion Cassiopeia build cost, giving you a clear view of where it could pay off first in practice. The design and ...

Inspired by a restored 19th-century clock, the piece features three subdials that keep track of time and distances.

Summary: Time doesn’t flow uniformly across the solar system, and new research reveals just how differently it unfolds on Mars compared with Earth. By tracing subtle gravitational and orbital ...

On Earth, telling time is easy. Our clocks are synchronized using atomic clocks, GPS satellites, and fast communication ...

Because this record survived, we know more about ancient Chinese history, the rotation of the Earth, and past solar activity ...