NGC 4945 (also known as Caldwell 83) is a barred spiral galaxy in the constellation Centaurus, visible near the star Xi Centauri.

[3] The galaxy was discovered by James Dunlop in 1826 and is thought to be similar to the Milky Way Galaxy, although X-ray observations show that NGC 4945 has an unusual energetic Seyfert 2 nucleus that might house a supermassive black hole.

[4] Around the nucleus of the galaxy, there is a dense disk of dust and gas, along with many dense star clusters.

[6] Two supernovae have been observed in NGC 4945: NGC 4945 one of the brightest galaxies of the Centaurus A/M83 Group, a large, nearby group of galaxies.

[2][11] "NGC 4945" is the title of a song by Brett Domino on the album Funk.