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  2. Nebula - Wikipedia

    en.wikipedia.org/wiki/Nebula

    Visible light nebulae may be divided into emission nebulae, which emit spectral line radiation from excited or ionized gas (mostly ionized hydrogen); [25] they are often called H II regions, H II referring to ionized hydrogen), and reflection nebulae which are visible primarily due to the light they reflect.

  3. NGC 6357 - Wikipedia

    en.wikipedia.org/wiki/NGC_6357

    NGC 6357 is a diffuse nebula near NGC 6334 in the constellation Scorpius.The nebula contains many proto-stars shielded by dark discs of gas, and young stars wrapped in expanding "cocoons" or expanding gases surrounding these small stars.

  4. NGC 7027 - Wikipedia

    en.wikipedia.org/wiki/NGC_7027

    Jewel Bug Nebula, [citation needed] Gummy Bear Nebula [5] See also: Lists of nebulae NGC 7027, also known as the Jewel Bug Nebula or the Magic Carpet Nebula , [ 6 ] is a very young and dense planetary nebula [ 7 ] located around 3,000 light-years (920 parsecs ) from Earth in the constellation Cygnus .

  5. Emission nebula - Wikipedia

    en.wikipedia.org/wiki/Emission_nebula

    The nebula's color depends on its chemical composition and degree of ionization. Due to the prevalence of hydrogen in interstellar gas, and its relatively low energy of ionization, many emission nebulae appear red due to strong emissions of the Balmer series .

  6. NGC 7662 - Wikipedia

    en.wikipedia.org/wiki/NGC_7662

    A 6" telescope with a magnification around 100x will reveal a slightly bluish disk, while telescopes with a primary mirror at least 16" in diameter may reveal slight color and brightness variations in the interior. [4] This nebula has an elliptical shape with a triple-shell structure. The brightest is the main shell, which spans 12″ × 18 ...

  7. NGC 6590 - Wikipedia

    en.wikipedia.org/wiki/NGC_6590

    NGC 6590 is a reflection nebula in the constellation of Sagittarius. [2] This nebula is near the similar reflection nebula NGC 6589 . Both nebulas are flanked by red emission nebula IC 1284 .

  8. NGC 6826 - Wikipedia

    en.wikipedia.org/wiki/NGC_6826

    NGC 6826 (also known as Caldwell 15) is a planetary nebula located in the constellation Cygnus. It is commonly referred to as the "Blinking Planetary", although many other nebulae exhibit such "blinking". When viewed through a small telescope, the brightness of the central star overwhelms the eye when viewed directly, obscuring the surrounding ...

  9. Lagoon Nebula - Wikipedia

    en.wikipedia.org/wiki/Lagoon_Nebula

    Like many nebulae, it appears pink in time-exposure color photos but is gray to the eye peering through binoculars or a telescope, human vision having poor color sensitivity at low light levels. The nebula contains a number of Bok globules (dark, collapsing clouds of protostellar material), the most prominent of which have been catalogued by E ...