As a space scientist, every time I go outside with my family, I tell my children to look up at the sky. The front door of our home looks southeast, and on winter nights the constellation Orion hangs ...

The equatorial coordinate system projects Earth's latitude and longitude onto the celestial sphere, using declination (angular distance from the celestial equator, measured in degrees) and right ...

Newly discovered fragments of 2,200-year-old star coordinates—once thought lost—reveal the incredible skill of the ancient astronomer Hipparchus. This colored version of a 19th-century engraving ...

The horizontal coordinate system uses two angles: altitude (or elevation) and azimuth, relative to the observer’s horizon, to locate the celestial object in three-dimensional space. This method is ...

Astronomers have recently detected a mysterious sphere orbiting a distant star, capturing the attention of the scientific community. This discovery raises intriguing questions about its origin, ...

The Las Vegas Sphere has turned into a giant Blood Moon to mark the total lunar eclipse. Learn why the Moon turns red and how ...