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  2. Circumhorizontal arc - Wikipedia

    en.wikipedia.org/wiki/Circumhorizontal_arc

    The 90° inclination between the ray entrance and exit faces produce the well-separated spectral colours. The arc has a considerable angular extent and thus, rarely is complete. When only fragments of a cirrus cloud are in the appropriate sky and sun position, they may appear to shine with spectral colours. [5]

  3. Halo (optical phenomenon) - Wikipedia

    en.wikipedia.org/wiki/Halo_(optical_phenomenon)

    Parhelic circle – Type of halo, an optical phenomenon; Parry arc – Optical phenomenon; Rainbow – Meteorological phenomenon; Subhelic arc – Rare halo; Subparhelic circle – Rare atmospheric optical phenomenon; Subsun – Glowing spot that can be seen within clouds or haze when observed from above; Sun dog – Atmospheric optical phenomenon

  4. List of Nine Inch Nails concert tours - Wikipedia

    en.wikipedia.org/wiki/List_of_Nine_Inch_Nails...

    Subsequent tours have featured Nine Inch Nails as the headlining act, with support from bands such as Unkle, Marilyn Manson, Atari Teenage Riot, and A Perfect Circle. Nine Inch Nails' live performances contrast with its in-studio counterpart.

  5. Earth's orbit - Wikipedia

    en.wikipedia.org/wiki/Earth's_orbit

    Earth at seasonal points in its orbit (not to scale) Earth orbit (yellow) compared to a circle (gray) Earth orbits the Sun at an average distance of 149.60 million km (92.96 million mi), or 8.317 light-minutes, [1] in a counterclockwise direction as viewed from above the Northern Hemisphere.

  6. Deferent and epicycle - Wikipedia

    en.wikipedia.org/wiki/Deferent_and_epicycle

    The basic elements of Ptolemaic astronomy, showing a planet on an epicycle (smaller dashed circle), a deferent (larger dashed circle), the eccentric (×) and an equant (•). In both Hipparchian and Ptolemaic systems, the planets are assumed to move in a small circle called an epicycle , which in turn moves along a larger circle called a ...

  7. Circumzenithal arc - Wikipedia

    en.wikipedia.org/wiki/Circumzenithal_arc

    The arc is located a considerable distance (approximately 46°) above the observed Sun and at most forms a quarter of a circle centered on the zenith. It has been called "a smile in the sky", its first impression being that of an upside-down rainbow. The CZA is one of the brightest and most colorful members of the halo family. Its colors ...

  8. 50 Times The Sky Surprised Us With Fascinating Cloud Shapes ...

    www.aol.com/130-most-fanciful-cloud-shapes...

    If you’ve ever indulged in the habit of cloudspotting, you’ve probably seen all kinds of things in the sky, from animals and faces to UFOs and cartoon characters.

  9. Parhelic circle - Wikipedia

    en.wikipedia.org/wiki/Parhelic_circle

    A parhelic circle is a type of halo, an optical phenomenon appearing as a horizontal white line on the same altitude as the Sun, or occasionally the Moon. If complete, it stretches all around the sky, but more commonly it only appears in sections. [2] If the halo occurs due to light from the Moon rather than the Sun, it is known as a ...