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  2. Edwin Hubble - Wikipedia

    en.wikipedia.org/wiki/Edwin_Hubble

    Using the Hooker Telescope at Mount Wilson, Hubble identified Cepheid variables, a standard candle discovered by Henrietta Swan Leavitt. [7] Comparing their apparent luminosity to their intrinsic luminosity gives their distance from Earth. [25] [26] Hubble found Cepheids in several nebulae, including the Andromeda Nebula and Triangulum Nebula.

  3. Nebula - Wikipedia

    en.wikipedia.org/wiki/Nebula

    In 1610, Nicolas-Claude Fabri de Peiresc discovered the Orion Nebula using a telescope. This nebula was also observed by Johann Baptist Cysat in 1618. However, the first detailed study of the Orion Nebula was not performed until 1659 by Christiaan Huygens, who also believed he was the first person to discover this nebulosity. [11]

  4. M2-9 - Wikipedia

    en.wikipedia.org/wiki/M2-9

    Minkowski 2-9, abbreviated M2-9 (also known as Minkowski's Butterfly, Twin Jet Nebula, the Wings of a Butterfly Nebula, or just Butterfly Nebula) is a planetary nebula that was discovered by Rudolph Minkowski in 1947. It is located about 2,100 light-years away from Earth in the direction of the constellation Ophiuchus.

  5. Planetary nebula - Wikipedia

    en.wikipedia.org/wiki/Planetary_nebula

    The first planetary nebula discovered (though not yet termed as such) was the Dumbbell Nebula in the constellation of Vulpecula.It was observed by Charles Messier on July 12, 1764 and listed as M27 in his catalogue of nebulous objects. [10]

  6. Horsehead Nebula - Wikipedia

    en.wikipedia.org/wiki/Horsehead_Nebula

    The nebula was discovered by Scottish astronomer Williamina Fleming in 1888 on a photographic plate taken at the Harvard College Observatory. [7] [8] One of the first descriptions was made by E. E. Barnard, describing it as: "Dark mass, diam. 4′, on nebulous strip extending south from ζ Orionis", cataloguing the dark nebula as Barnard 33.

  7. Crab Nebula - Wikipedia

    en.wikipedia.org/wiki/Crab_Nebula

    The Crab Nebula (catalogue designations M1, NGC 1952, Taurus A) is a supernova remnant and pulsar wind nebula in the constellation of Taurus.The common name comes from a drawing that somewhat resembled a crab with arms produced by William Parsons, 3rd Earl of Rosse, in 1842 or 1843 using a 36-inch (91 cm) telescope. [6]

  8. Cat's Eye Nebula - Wikipedia

    en.wikipedia.org/wiki/Cat's_Eye_Nebula

    The Cat's Eye Nebula (also known as NGC 6543 and Caldwell 6) is a planetary nebula in the northern constellation of Draco, discovered by William Herschel on February 15, 1786. It was the first planetary nebula whose spectrum was investigated by the English amateur astronomer William Huggins , demonstrating that planetary nebulae were gaseous ...

  9. Veil Nebula - Wikipedia

    en.wikipedia.org/wiki/Veil_Nebula

    The Veil Nebula is a cloud of heated and ionized gas and dust in the constellation Cygnus. [4] ... The nebula was discovered on 5 September 1784 by William Herschel ...