enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Asterism (gemology) - Wikipedia

    en.wikipedia.org/wiki/Asterism_(gemology)

    Rutile causes the relative bright relief of a star in a host material such as corundum, which has a refractive index between 1.760 and 1.778, much lower than that of rutile. The stars are caused by the light reflecting from needle-like inclusions of rutile aligned perpendicularly to the rays of the star.

  3. NGC 1535 - Wikipedia

    en.wikipedia.org/wiki/NGC_1535

    NGC 1535, also known as Cleopatra's Eye, [3] is a planetary nebula in the constellation of Eridanus, discovered by William Herschel on February 1, 1785. [4] It is very similar to the Eskimo Nebula in both color and structure but the central star can be quite difficult to observe visually. [ 5 ]

  4. List of stars with resolved images - Wikipedia

    en.wikipedia.org/wiki/List_of_stars_with...

    The following is a list of stars with resolved images, that is, stars whose images have been resolved beyond a point source. Aside from the Sun , observed from Earth , stars are exceedingly small in apparent size, requiring the use of special high-resolution equipment and techniques to image.

  5. Rutile - Wikipedia

    en.wikipedia.org/wiki/Rutile

    Rutile is an oxide mineral composed of titanium dioxide (TiO 2), the most common natural form of TiO 2. Rarer polymorphs of TiO 2 are known, including anatase , akaogiite , and brookite . Rutile has one of the highest refractive indices at visible wavelengths of any known crystal and also exhibits a particularly large birefringence and high ...

  6. Aquila (constellation) - Wikipedia

    en.wikipedia.org/wiki/Aquila_(constellation)

    α Aql (Altair) is the brightest star in this constellation and one of the closest naked-eye stars to Earth at a distance of 17 light-years. Its name comes from the Arabic phrase al-nasr al-tair, meaning "the flying eagle". Altair has a magnitude of 0.76. [1] It is one of the three stars of the Summer Triangle, along with Vega and Deneb.

  7. NGC 1232 - Wikipedia

    en.wikipedia.org/wiki/NGC_1232

    NGC 1232, also known as the Eye of God Galaxy (not to be confused with the Helix Nebula, also known as Eye of God) is an intermediate spiral galaxy about 60 million light-years away [2] in the constellation Eridanus. It was discovered by German-British astronomer William Herschel on 20 October 1784. [3]

  8. V762 Cassiopeiae - Wikipedia

    en.wikipedia.org/wiki/V762_Cassiopeiae

    V762 Cassiopeiae is a red supergiant and a variable star located about 2,500 light-years away in the Cassiopeia constellation. Its apparent magnitude vary between 5.82 and 5.95, which makes it faintly visible to the naked eye under dark skies. It is a relatively cool star with an average surface temperature of 3,869 K.

  9. UY Scuti - Wikipedia

    en.wikipedia.org/wiki/UY_Scuti

    UY Scuti (BD-12°5055) is a red supergiant star, located 5,900 light-years away in the constellation Scutum.It is also a pulsating variable star, with a maximum brightness of magnitude 8.29 and a minimum of magnitude 10.56, which is too dim for naked-eye visibility.