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  2. Astronomical filter - Wikipedia

    en.wikipedia.org/wiki/Astronomical_filter

    An astronomical filter is a telescope accessory consisting of an optical filter used by amateur astronomers to simply improve the details and contrast of celestial objects, either for viewing or for photography. Research astronomers, on the other hand, use various band-pass filters for photometry on telescopes, in order to obtain measurements ...

  3. Visible-light astronomy - Wikipedia

    en.wikipedia.org/wiki/Visible-light_astronomy

    Visible-light astronomy has existed as long as people have been looking up at the night sky, although it has since improved in its observational capabilities since the invention of the telescope, which is commonly credited to Hans Lippershey, a German-Dutch spectacle-maker, [1] although Galileo played a large role in the development and ...

  4. List of alternative metal artists - Wikipedia

    en.wikipedia.org/wiki/List_of_alternative_metal...

    Bad Brains [96] Yes: 1986 album I Against I recognized as one of the first alternative metal albums. Also classed as hardcore punk and reggae rock. Bad Omens [97] Yes: Also classed as metalcore. Baroness [98] [99] Yes: Also classed as sludge metal, progressive metal and post-rock. Beartooth [100] Yes: Also classed as metalcore, hardcore, post ...

  5. Radiative cooling - Wikipedia

    en.wikipedia.org/wiki/Radiative_cooling

    The roof acts as the best heat sink because it is the greatest surface exposed to the night sky. Radiate heat transfer with the night sky will remove heat from the building roof, thus cooling the building structure. Roof ponds are an example of this strategy. The roof pond design became popular with the development of the Sky thermal system ...

  6. List of brightest stars - Wikipedia

    en.wikipedia.org/wiki/List_of_brightest_stars

    The Sun is the brightest star as viewed from Earth, at −26.78 mag. The second brightest is Sirius at −1.46 mag. For comparison, the brightest non-stellar objects in the Solar System have maximum brightnesses of: the Moon −12.7 mag [ 1] Venus −4.92 mag. Jupiter −2.94 mag. Mars −2.94 mag.

  7. Winter vs. summer: Which season offers the best night sky? - AOL

    www.aol.com/news/winter-vs-summer-season-offers...

    Night skies have something to offer no matter the time of year. It also appears differently depending on the season. Which season offers the best night skies: winter or summer?

  8. New Study Reveals The Best and Worst Dog Breeds and Pet ... - AOL

    www.aol.com/study-reveals-best-worst-dog...

    The top best behaved breeds were Labs, Rottweilers, Shih Tzus, Cane Corsos, and Golden Retrievers. Obviously, this shouldn't stop you from getting one of the "worst behaved" breeds.

  9. Astronomical seeing - Wikipedia

    en.wikipedia.org/wiki/Astronomical_seeing

    The vertical scale of the wavefronts plotted is highly exaggerated. In astronomy, seeing is the degradation of the image of an astronomical object due to turbulence in the atmosphere of Earth that may become visible as blurring, twinkling or variable distortion. The origin of this effect is rapidly changing variations of the optical refractive ...

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