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  2. Red Rectangle Nebula - Wikipedia

    en.wikipedia.org/wiki/Red_Rectangle_Nebula

    The Red Rectangle Nebula, so called because of its red color and unique rectangular shape, is a protoplanetary nebula in the Monoceros constellation.Also known as HD 44179, the nebula was discovered in 1973 during a rocket flight associated with the AFCRL Infrared Sky Survey called Hi Star.

  3. Red Spider Nebula - Wikipedia

    en.wikipedia.org/wiki/Red_Spider_Nebula

    The Red Spider Nebula (also catalogued as NGC 6537) is a planetary nebula located near the heart of the Milky Way, in the northwest of [3] the constellation Sagittarius. [4] The nebula has a prominent two-lobed shape, possibly due to a binary companion or magnetic fields and has an S-shaped symmetry of the lobes – the lobes opposite each ...

  4. List of planetary nebulae - Wikipedia

    en.wikipedia.org/wiki/List_of_planetary_nebulae

    Red Spider Nebula: NGC 6537: 1888 (prior to) 3.9 (approx.) 11.9 Sagittarius: NGC 6565: 14 14 Sagittarius: Bug Nebula or Butterfly Nebula: NGC 6302: Caldwell 69 1888 ...

  5. Red Square Nebula - Wikipedia

    en.wikipedia.org/wiki/Red_Square_Nebula

    The Red Square Nebula is a celestial object located in the area of the sky occupied by star MWC 922 in the constellation Serpens.The first images of this bipolar nebula, taken using the Palomar Observatory Hale Telescope in California, were released in April 2007.

  6. V838 Monocerotis - Wikipedia

    en.wikipedia.org/wiki/V838_Monocerotis

    V838 Monocerotis (Nova Monocerotis 2002) is a cataclysmic binary star in the constellation Monoceros about 19,000 light years (6 kpc) from the Sun.The previously unremarked star was observed in early 2002 experiencing a major outburst, and was one of the largest known stars for a short period following the outburst. [10]

  7. Betelgeuse - Wikipedia

    en.wikipedia.org/wiki/Betelgeuse

    The letter "M" in this designation means that it is a red star belonging to the M spectral class and therefore has a relatively low photospheric temperature; the "Ia-ab" suffix luminosity class indicates that it is an intermediate-luminosity supergiant, with properties partway between a normal supergiant and a luminous supergiant. Since 1943 ...

  8. Mu Cephei - Wikipedia

    en.wikipedia.org/wiki/Mu_Cephei

    It appears garnet red and is located at the edge of the IC 1396 nebula. It is a 4th magnitude star easily visible to the naked eye under good observing conditions. Since 1943, the spectrum of this star has served as a spectral standard by which other stars are classified.

  9. Orion Nebula - Wikipedia

    en.wikipedia.org/wiki/Orion_nebula

    The Orion Nebula is visible with the naked eye even from areas affected by light pollution. It is seen as the middle "star" in the "sword" of Orion, which are the three stars located south of Orion's Belt. The "star" appears fuzzy to sharp-eyed observers, and the nebulosity is obvious through binoculars or a small telescope.