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10 relations: Galactic coordinate system, Galaxy rotation curve, Hipparcos, Index of physics articles (O), Jan Oort, List of Dutch inventions and discoveries, Milky Way, Oort (disambiguation), Stellar kinematics, Sun.

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.

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Galaxy rotation curve

The rotation curve of a disc galaxy (also called a velocity curve) is a plot of the orbital speeds of visible stars or gas in that galaxy versus their radial distance from that galaxy's centre.

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Hipparcos

Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993.

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Index of physics articles (O)

The index of physics articles is split into multiple pages due to its size.

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Jan Oort

Jan Hendrik Oort (or; 28 April 1900 – 5 November 1992) was a Dutch astronomer who made significant contributions to the understanding of the Milky Way and who was a pioneer in the field of radio astronomy.

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List of Dutch inventions and discoveries

The Netherlands had a considerable part in the making of modern society.

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Milky Way

The Milky Way is the galaxy that contains our Solar System.

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Oort (disambiguation)

Oort is a Dutch toponymic surname most commonly referring to the astronomer Jan Oort.

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Stellar kinematics

In astronomy, stellar kinematics is the observational study or measurement of the kinematics or motions of stars through space.

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Sun

The Sun is the star at the center of the Solar System.

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Redirects here:

Oort Constants, Oort constant, Oort's constant, Oort's constants, Oort's formulae.

References

[1] https://en.wikipedia.org/wiki/Oort_constants

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