This is a table of galactic observational firsts in astronomy history.
|First spiral galaxy||Messier 51||Canes Venatici||1845||Lord William Parsons, Earl of Rosse discovered the first spiral nebula from observing M51 (recognition of the spiral shape without the recognition of the object as outside the Milky Way).|
|Notion of galaxy||Milky Way Galaxy & Messier 31||Sagittarius (centre) & Andromeda||1923||Recognition of the Milky Way and the Andromeda nebula as two separate galaxies by Edwin Hubble.|
|First Seyfert galaxy||NGC 1068 (M77)||Cetus||1943 (1908)||The characteristics of Seyfert galaxies were first observed in M77 in 1908, however, Seyferts were defined as a class in 1943.|
|First radio galaxy||Cygnus A||Cygnus||1951/2||Of several items, then called radio stars, Cygnus A was identified with a distant galaxy, being the first of many radio stars to become a radio galaxy.|
|First quasar|| 3C273 |
| Virgo |
| 1962 |
|3C273 was the first quasar with its redshift determined, and by some considered the first quasar. 3C48 was the first "radio-star" with an unreadable spectrum, and by others considered the first quasar.|
|First superluminal galactic jet||3C279||Virgo||1971||The jet is emitted by a quasar|
|First low-surface-brightness galaxy||Malin 1||Coma Berenices||1986||Malin 1 was the first verified LSB galaxy. LSB galaxies had been first theorized in 1976.|
|First superluminal jet from a Seyfert||III Zw 2||Pisces||2000|||
- ↑ SEDS, Lord Rosse's drawings of M51, his "Question Mark" "Spiral Nebula"
- ↑ SEDS, Seyfert Galaxies
- ↑ Burbidge, G. (1999). "Baade & Minkowski's Identification of Radio Sources". Astrophysical Journal 525: 569. Bibcode: 1999ApJ...525C.569B.
- ↑ Baade, W.; Minkowski, R.. "Identification of the Radio Sources in Cassiopeia, Cygnus a, and Puppis a.". The Astrophysical Journal 119: 206. doi:10.1086/145812. Bibcode: 1954ApJ...119..206B.
- ↑ Scientific American, "The Ghostliest Galaxies", GD Bothun, Vol. 276, No. 2, February 1997, pp.40-45, Template:Bibcode
- ↑ http://iopscience.iop.org/1538-3881/122/4/2055/datafile8.txt
- ↑ Brunthaler, A. (2000). "III Zw 2, the first superluminal jet in a Seyfert galaxy". Astronomy & Astrophysics Letters 357: 45. Bibcode: 2000A&A...357L..45B.