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  2. Galactic coordinate system - Wikipedia

    en.wikipedia.org/wiki/Galactic_coordinate_system

    The galactic coordinate system is a celestial coordinate system in spherical coordinates, with the Sun as its center, the primary direction aligned with the approximate center of the Milky Way Galaxy, and the fundamental plane parallel to an approximation of the galactic plane but offset to its north.

  3. Astronomical coordinate systems - Wikipedia

    en.wikipedia.org/wiki/Astronomical_coordinate...

    The galactic coordinate system uses the approximate plane of the Milky Way Galaxy as its fundamental plane. The Solar System is still the center of the coordinate system, and the zero point is defined as the direction towards the Galactic Center. Galactic latitude resembles the elevation above the galactic plane and galactic longitude ...

  4. Supergalactic coordinate system - Wikipedia

    en.wikipedia.org/wiki/Supergalactic_coordinate...

    The supergalactic coordinate system is a spherical coordinate system in which the equator lies in the supergalactic plane. By convention, supergalactic latitude is usually abbreviated SGB, and supergalactic longitude as SGL, by analogy to b and l conventionally used for galactic coordinates. Supergalactic and Ecliptic plane

  5. List of interactive geometry software - Wikipedia

    en.wikipedia.org/wiki/List_of_interactive...

    trace mode: cross-hair following plot, coordinates shown in the status bar; zooming support; ability to draw the 1st and 2nd derivative and the integral of a plot function; support user-defined constants and parameter values; various tools for plot functions: find minimum/maximum point, get y-value and draw the area between the function and the ...

  6. Milky Way - Wikipedia

    en.wikipedia.org/wiki/Milky_Way

    A diagram of the Sun's location in the Milky Way, the angles represent longitudes in the galactic coordinate system. A galactic quadrant, or quadrant of the Milky Way, refers to one of four circular sectors in the division of the Milky Way. In astronomical practice, the delineation of the galactic quadrants is based upon the galactic coordinate ...

  7. Galactic quadrant - Wikipedia

    en.wikipedia.org/wiki/Galactic_quadrant

    Orientation of the galactic, ecliptic and equatorial coordinate systems, projected on the celestial sphere. Due to the orientation of the Earth to the rest of the galaxy, the 2nd galactic quadrant is primarily only visible from the northern hemisphere while the 4th galactic quadrant is mostly only visible from the southern hemisphere.

  8. Cosmic distance ladder - Wikipedia

    en.wikipedia.org/wiki/Cosmic_distance_ladder

    The lower diagram shows the equal angle swept by the Sun in a geostatic model. A similar diagram can be drawn for a star except that the angle of parallax would be minuscule. The most important fundamental distance measurements in astronomy come from trigonometric parallax , as applied in the stellar parallax method .

  9. Mathematics of general relativity - Wikipedia

    en.wikipedia.org/wiki/Mathematics_of_general...

    Any observer can make measurements and the precise numerical quantities obtained only depend on the coordinate system used. This suggested a way of formulating relativity using 'invariant structures', those that are independent of the coordinate system (represented by the observer) used, yet still have an independent existence.