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2. Galaxy rotation curve - Wikipedia

   en.wikipedia.org/wiki/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. It is typically rendered graphically as a plot , and the data observed from each side of a spiral galaxy are generally asymmetric, so that data from ...

3. Solar System model - Wikipedia

   en.wikipedia.org/wiki/Solar_System_model

   A list of websites related to Solar System models; The Otford Solar System; An accurate web-based scroll map of the Solar System scaled to the Moon being 1 pixel; An online scale model Archived 2020-01-05 at the Wayback Machine (does not work in some browsers) An online 3D model; An article on the Solar System in Maine Archived 2013-10-10 at ...

4. NASA's Eyes - Wikipedia

   en.wikipedia.org/wiki/NASA's_Eyes

   NASA's Eyes Visualization (also known as simply NASA's Eyes) is a freely available suite of computer visualization applications created by the Visualization Technology Applications and Development Team at NASA's Jet Propulsion Laboratory (JPL) to render scientifically accurate views of the planets studied by JPL missions and the spacecraft used in that study.

5. Modified Newtonian dynamics - Wikipedia

   en.wikipedia.org/wiki/Modified_Newtonian_dynamics

   Modified Newtonian dynamics (MOND) is a theory that proposes a modification of Newton's second law to account for observed properties of galaxies.Its primary motivation is to explain galaxy rotation curves without invoking dark matter, and is one of the most well-known theories of this class.

6. Oort constants - Wikipedia

   en.wikipedia.org/wiki/Oort_constants

   Figure 1: Geometry of the Oort constants derivation, with a field star close to the Sun in the midplane of the Galaxy. Consider a star in the midplane of the Galactic disk with Galactic longitude at a distance from the Sun. Assume that both the star and the Sun have circular orbits around the center of the Galaxy at radii of and from the Galactic Center and rotational velocities of and ...

7. Solar System - Wikipedia

   en.wikipedia.org/wiki/Solar_System

   The largest such scale model, the Sweden Solar System, uses the 110-meter (361-foot) Avicii Arena in Stockholm as its substitute Sun, and, following the scale, Jupiter is a 7.5-meter (25-foot) sphere at Stockholm Arlanda Airport, 40 km (25 mi) away, whereas the farthest current object, Sedna, is a 10 cm (4 in) sphere in Luleå, 912 km (567 mi ...

8. Formation and evolution of the Solar System - Wikipedia

   en.wikipedia.org/wiki/Formation_and_evolution_of...

   The Solar System travels alone through the Milky Way in a circular orbit approximately 30,000 light years from the Galactic Center. Its speed is about 220 km/s. The period required for the Solar System to complete one revolution around the Galactic Center, the galactic year, is in the range of 220–250 million years. Since its formation, the ...

9. Galactic orientation - Wikipedia

   en.wikipedia.org/wiki/Galactic_orientation

   A galactic orientation describes the spatial orientation of a galactic plane, where such exists for a given galaxy.For a spiral galaxy, this can be obtained from the inclination of the galactic plane to the plane of the sky, and the position angle of the major axis as viewed from Earth.