Here’s what to know about the Earth’s orbit. As the Earth travels around the sun ... What’s the difference between ...

5. The summer solstice can vary from year to year. The Earth’s four seasons are determined by the planet’s tilt relative to the sun. Based on its position in its orbit around the sun, the Earth’s ...

June 20th marks the summer solstice, the longest day of the year in the Northern Hemisphere. This astronomical event occurs ...

The summer solstice is a moment in space and time during the annual orbit when our tilted planet's Northern Hemisphere points ...

Peak sunshine has arrived in the Northern Hemisphere — the summer solstice. Friday is the longest day of the year north of ...

A family of asteroids share the planet's orbit, and two new studies suggest that one day the space rocks could theoretically pose a danger to Earth. Venus has groupies—a family of asteroids that ...

Summer is about to get a little less fun. Paige DeSorbo announced she's leaving "Summer House" following the season nine reunion, which concluded June 4. “I have a little life update for you ...

New missions such as NASA’s upcoming Geospace Dynamics Constellation will add low-Earth-orbit perspectives, offering a 3-D look at plasma motions. Combined with ground-based radars and all-sky cameras ...

An example of this are the "ghost moons" discovered in 1961 by the Polish astronomer Kazimierz Kordylewski (1903-1981), clouds of dust accumulated around the Lagrange points in the Earth-Moon system.

or rely on on-orbit refueling in orbit around Earth and Mars to successfully complete a return trip between planets. In addition, there are many unknowns regarding the need for radiation shielding ...