The Astronomical ZooThe Astronomical ZooStarsPlanetsNovae

1577 Comets1610 Moons1638 Variable stars1655 Rings1754 Open clusters1798 Interplanetary matter1801 Asteroids1803 Multiple stars1831 Globular clusters1864 Clusters of galaxies1864 Planetary nebulae1865 Ionised gas clouds1901 Cold interstellar gas1909 Giants/MS stars1912 Cosmic rays1914 Pulsating variables1915 White dwarfs1919 Interstellar dust

1924 Galaxies1929 Cosmic expansion1934 Supernovae/novae1939 Galaxies with/without gas1942 Supernova remnants1945 T Tauri stars1946 Radio galaxies1946 Magnetic variables1947 Flare stars1957 Interstellar magnetic fields1962 X-ray stars1962 X-ray background1962 Quasars1965 Microwave background1965 Masers1965 Infrared stars1966 X-ray galaxies1967 Pulsars1968 Gamma-ray background1968 Infrared galaxies1971 Superluminal sources1973 Gamma-ray bursts

Classification: Classification: transient/variabletransient/variable

Classification: Classification: transient/variabletransient/variable

Classification: Classification: transient/variabletransient/variable

Classification: nebulaeClassification: nebulae

Messier’s drawings of M42, the Orion nebula, and M31, the Andromeda galaxy

Classification: nebulaeClassification: nebulaeDrawings of nebulae by William Herschel

Classification: nebulaeClassification: nebulae

Modern drawings of M27 and M33 by Jaako Saloranta

Classification: nebulaeClassification: nebulae

Classification: starsClassification: stars

Vega

Sun

Peg

19 Psc

Classification: starsClassification: stars

Father Secchi’s sketches of the spectra of Mira (top) and HD 78712 (type M6 III) compared to a photograph of Mira’s spectrum

Classification: starsClassification: starsSecchi’s sketch of a Type IV spectrum (star HD110914, type C7 Iab) compared to a modern carbon star spectrum

Classification: starsClassification: stars

Harvard College Observatory spectro-scopy for the Henry Draper catalogue

Classification: starsClassification: starsABFGKMMO

Michael Richmond, http://spiff.rit.edu/classes/phys301/lectures/class/class.html

Modern spectra in original ordering

Classification: starsClassification: stars

Luminosity classes I – V plus a white dwarf, from Michael Richmond’s page. Source: An Atlas of Representative Spectra, by

Yamashita, Nariai and Norimoto (University of Tokyo Press, Tokyo, 1978)