The Moon is getting 1½ inches (3.8 centimeters) farther away from the Earth every year. Scientists measure the distance to ...

The Mechanics of Earth's Spin Earth rotates once in about 24 hours with respect to the Sun, but once every 23 hours, 56 ...

King Tides, formally known as Perigean-Spring Tides, are exceptionally high tides. These usually occur about three times a ...

On certain trans-Pacific flights, you can "time travel" by crossing the International Date Line. For example, if you want to go from San Francisco to Tokyo, and your flight departs at 5:00 p.m. on ...

Conventionally, the moon is thought to have formed during one big impact, but a three-impact model might make more sense ...

"The most convincing scenario is that most of the building blocks of Earth and Theia originated in the inner solar system.

"During the early solar system's game of cosmic billiards, Earth was struck by a neighbor,” said Dauphas. “It was a lucky shot. Without the moon's steadying influence on our planet's tilt, the climate ...

Astronomers recently detected a stray quasi-moon in our planet’s orbit, but it's hardly the first stowaway to hang out around Earth. Unlike the Earth's moon, quasi-moons are not gravitationally bound ...

Gravity and motion make time pass faster on Mars than Earth, reshaping navigation, communication, and future crewed missions.

Little is known about the long-destroyed moon-forming planet, Theia. But it may have been born in the inner solar system—just like Earth—a new study suggests ...

Editor's note: The sun unleashed a third X-class solar flare on Nov. 11. Clocking in at X5.1, it is the biggest solar flare this year and could impact Earth on Nov. 12. Northern lights could be ...

Kim Hee Sun is ready to channel her inner “home-shopping queen” in tonight’s episode of “No Next Life”! “No Next Life” is a new comedy starring Kim Hee Sun, Han Hye Jin, and Jin Seo Yeon as three ...