14. The Sun emits a continuous stream of plasma called the solar wind. On Earth, the most visible effect of the solar wind is ...

From orbiting the Sun to moving through the Milky Way, Earth’s motion is far more complex and faster than most people realize.Explore the Earth’s orbit around the Sun.

They orbit the Milky Way at a distance of about 160,000 light-years and are visible from the Southern Hemisphere without a telescope, according to NASA's Goddard Space Flight Center.

A team of astronomers led by Dr. Phil Massey of Lowell Observatory has taken the sharpest look yet at one of the heaviest ...

Two colliding galaxies have been found to be reorganizing their dwarf satellites, potentially solving a major conundrum ...

The Milky Way is our home galaxy, a vast spiral structure with a disk of stars stretching over 100,000 light-years across. Earth resides along one of its spiral arms, roughly halfway between the ...

In the search for signs of life on what seemed like a promising little exoplanet, astronomers’ hopes have dimmed.

Astronomers had hoped to observe an atmosphere on one of the seven planets known to orbit Trappist-1, a red dwarf star. A new ...