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  2. 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.

  3. Haidinger's brush - Wikipedia

    en.wikipedia.org/wiki/Haidinger's_brush

    Haidinger's brush, more commonly known as Haidinger's brushes is an image produced by the eye, an entoptic phenomenon, first described by Austrian physicist Wilhelm Karl von Haidinger in 1844. Haidinger saw it when he looked through various minerals that polarized light. [1] [2] Many people are able to perceive polarization of light. [3]

  4. NGC 6565 - Wikipedia

    en.wikipedia.org/wiki/NGC_6565

    Over the course of around 10,000 years the white dwarf will cool down dramatically, diminishing the light of the nebula and making it only visible in a long-exposure photograph. [2] The nebula of NGC 6565 is thought to be composed of three different zones. The inner zone, which is the bright circle seen in the featured image, is heavily ionized ...

  5. Astronomical filter - Wikipedia

    en.wikipedia.org/wiki/Astronomical_filter

    These glass filters can crack unexpectedly from overheating when the telescope is pointed at the Sun, and retinal damage can occur faster than the observer can move the eye from the eyepiece." [ 3 ] Solar filters are used to safely observe and photograph the Sun , which despite being white, may appear as a yellow-orange disk.

  6. NGC 1491 - Wikipedia

    en.wikipedia.org/wiki/NGC_1491

    NGC 1491, also known as LBN 704, SH2-206 or the Fossil Footprint Nebula, is an emission type bright nebula located about 9,800 light years away from Earth in the constellation of Perseus. [1] The nebula gets its deep red coloration due to many massive stars (such as BD+50 866 ) embedded within NGC 1491 producing large amounts of ultraviolet ...

  7. Sh 2-264 - Wikipedia

    en.wikipedia.org/wiki/Sh_2-264

    It can be resolved with a pair of binoculars. The rest of the cluster and associated nebula spans a few hundred light-years centred about 1400 light-years away. The broad nebula shown is not visible unaided, with binoculars or small amateur telescopes. It becomes clear in long-exposure photographs, such as in the first illustration on this page.

  8. NGC 7027 - Wikipedia

    en.wikipedia.org/wiki/NGC_7027

    The nebula is rich in carbon, and is a very interesting object for the study of carbon chemistry in dense molecular material exposed to strong ultraviolet radiation. [18] The spectrum of NGC 7027 contains fewer spectral lines from neutral molecules than is usual for planetary nebulae.

  9. Sadr Region - Wikipedia

    en.wikipedia.org/wiki/Sadr_Region

    The Sadr Region (also known as IC 1318 or the Gamma Cygni Nebula) is the diffuse emission nebula surrounding Sadr at the center of Cygnus's cross. The Sadr Region is one of the surrounding nebulous regions; others include the Butterfly Nebula and the Crescent Nebula. It contains many dark nebulae in addition to the emission diffuse nebulae.

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