As Earth orbits the Sun, the Sun appears from our perspective to follow an imaginary line called the ecliptic that circles the celestial sphere. The Moon and planets all travel near the ecliptic ...

Pluto will reach its closest approach to Earth and align opposite the Sun on July 25, appearing slightly brighter (magnitude ...

By imagining Earth at the center of a celestial sphere, he used a coordinate system similar to latitude and longitude, which had recently been devised, to measure the precise positions of the stars.

The first videos released by the Vera C. Rubin Observatory reveal thousands of drifting asteroids, hundreds of thousands of stars and millions of distant galaxies.

Planetariums were a hit with the public. Within decades, they had spread around the world – the first planetarium in the ...

NASA’s SPHEREx mission is mapping the entire sky in 102 infrared colors, turning raw space data into a public tool for ...

Scientists have uncovered ancient secrets buried deep beneath the surface of the moon, thanks to China’s Chang’e-4 mission.

NASA’s SPHEREx space telescope has settled into low-Earth orbit, providing a wellspring of publicly available space data.

In a groundbreaking first, the James Webb Space Telescope has captured its first direct image of a distant exoplanet ...

Since Kepler's laws of motion dictate that celestial bodies orbit more slowly when farther from the sun, we are now moving at ...

Earth and our entire Milky Way galaxy may sit inside a mysterious giant hole which makes the cosmos expand faster here than in neighboring regions of the universe, astronomers say.