From decades of astronomical observations, scientists know that most galaxies contain massive black holes at their centers.

The passing gravitational waves “stretch or contract the universe by around 20 meters [about 65 feet] or so,” says Matthew ...

Shorter wavelength energy includes ultraviolet, X-ray and gamma radiation, while longer wavelength energy includes infrared and radio waves. Color perception is also affected by the quantity of ...

Astronomers have characterized the largest-ever early-Universe radio jet. Historically, such large radio jets have remained elusive in the distant Universe. With these observations, astronomers have ...