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  2. File:Components of proper motion.svg - Wikipedia

    en.wikipedia.org/wiki/File:Components_of_proper...

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  3. Proper motion - Wikipedia

    en.wikipedia.org/wiki/Proper_motion

    The components for proper motion in the equatorial coordinate system (of a given epoch, often J2000.0) are given in the direction of right ascension (μ α) and of declination (μ δ). Their combined value is computed as the total proper motion (μ). [2] [3] It has dimensions of angle per time, typically arcseconds per year or milliarcseconds ...

  4. List of common astronomy symbols - Wikipedia

    en.wikipedia.org/wiki/List_of_common_astronomy...

    Orbital Parameters of a Cosmic Object: . α - RA, right ascension, if the Greek letter does not appear, á letter will appear. δ - Dec, declination, if the Greek letter does not appear, ä letter will appear.

  5. Template:Pmcon - Wikipedia

    en.wikipedia.org/wiki/Template:Pmcon

    No description. Template parameters [Edit template data] Parameter Description Type Status 1 1 no description Unknown optional 2 2 no description Unknown optional 3 3 no description Unknown optional 4 4 no description Unknown optional 5 5 no description Unknown optional The above documentation is transcluded from Template:Pmcon/doc. (edit | history) Editors can experiment in this template's ...

  6. Position angle - Wikipedia

    en.wikipedia.org/wiki/Position_angle

    When graphing visual binaries, the NCP is, as in the illustration, normally drawn from the center point (origin) that is the Primary downward–that is, with north at bottom–and PA is measured counterclockwise. Also, the direction of the proper motion can, for example, be given by its position angle.

  7. The 6 best and 6 worst celebrity Christmas albums - AOL

    www.aol.com/news/6-best-6-worst-celebrity...

    Every year, celebrities try to capitalize on the holiday season by releasing festive music. Singers like Mariah Carey, Ariana Grande, and Michael Bublé managed to perfect the cheesy art form ...