Category

3C objects

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Orion Nebula thumbnail

Crab Nebula thumbnail

Supernova remnant

Messier 87 thumbnail

galaxy in the Virgo Galactic Cluster

Messier 82 thumbnail

galaxy in the constellation Ursa Major

Messier 84 thumbnail

elliptical or lenticular galaxy in the constellation Virgo

Messier 77 thumbnail

spiral galaxy in the constellation Cetus

SN 1604 thumbnail

supernova visible from Earth in the 17th century

NGC 1275 thumbnail

seyfert galaxy in the constellation Perseus

3C 273 thumbnail

Rosette Nebula thumbnail

nebula in the Milky Way Galaxy

NGC 383 thumbnail

Tycho's Supernova

supernova in the constellation Cassiopeia

elliptical galaxy

elliptical galaxy in the constellation Perseus

elliptical galaxy in the constellation Cetus

interacting galaxy

supernova remnant in the constellation Cassiopeia

Supernova remnant in the constellation Gemini

supernova remnant

Black hole system in the constellation Cetus

W49B (also known as SNR G043.3-00.2 or 3C 398) is a nebula in Westerhout 49 (W49). The nebula is a supernova remnant, probably from a type Ib or Ic supernova that occurred around 1,000 years ago. It may have produced a gamma-ray burst and is thought to have left a black hole remnant.

optically violent variable quasar

Quasar in the constellation Triangulum

active galaxy in the constellation Hercules

Third Cambridge Catalogue of Radio Sources

astronomical catalogue of celestial radio sources

quasar in the constellation Pisces

quasar located in the constellation Cancer

Seyfert galaxy in the constellation Cepheus

Elliptical galaxy and black hole

galaxy in the constellation Aries