Astronomical radio sources

electromagnetic radiation as a remnant from an early stage of the universe in Big Bang cosmology

the supermassive black hole at the center of the Milky Way Galaxy

type of active galaxy that is very luminous at radio wavelengths

Radio source at the center of the Milky Way galaxy

nebula in the constellation Cassiopeia

object in outer space that emits strong radio waves

Galaxy cluster in the constellation Phoenix

thumb|Artist's impression of the microquasar SS 433 A microquasar, a smaller version of a quasar, is a compact region surrounding a stellar black hole with a mass several times that of its companion star, observable in sufficient detail, in our own or nearby galaxy. The matter being pulled from the companion star forms an accretion disk around the black hole. This accretion disk may become so hot, due to friction, that it begins to emit X-rays. The disk also projects narrow streams or "jets" of subatomic particles at near-light speed, generating a strong radio wave emission.

purported correlation of the cosmic microwave background with the Earth’s ecliptic

naturally occurring source of stimulated spectral line emission, typically in the microwave portion of the electromagnetic spectrum

SHGb02+14a is an astronomical radio source and a candidate in the Search for Extra-Terrestrial Intelligence (SETI), discovered in March 2003 by SETI@home and announced in New Scientist on September 1, 2004.

random radio noise that originates outside the Earth's atmosphere

giant radio galaxy in the constellation Lynx

LB-1 is a binary star system in the constellation Gemini. In 2019, a paper in Nature proposed that the system contained an unusually massive stellar black hole outside of ordinary single stellar evolution parameters. However, analyses in 2020 found the original 2019 conclusion to be incorrect. Some researchers now believe the system consists of a stripped B-type star and a massive rapidly rotating Be star.