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Messier 81 (also known as NGC 3031 or Bode's Galaxy) is a grand design spiral galaxy about 12 million light-years away in the constellation Ursa Major.It has a D 25 isophotal diameter of 29.44 kiloparsecs (96,000 light-years).
The M81 Group is a galaxy group in the constellations Ursa Major and Camelopardalis that includes the galaxies Messier 81 and Messier 82, as well as several other galaxies with high apparent brightnesses. [1] The approximate center of the group is located at a distance of 3.6 Mpc, making it one of the nearest groups to the Local Group. [1]
380 Earth radii (very inaccurate, true=16000 Earth radii) Aristarchus of Samos made a measurement of the distance of the Sun from the Earth in relation to the distance of the Moon from the Earth. The distance to the Moon was described in Earth radii (20, also inaccurate). The diameter of the Earth had been calculated previously.
This is because the distance between Earth and the Sun is not fixed (it varies between 0.983 289 8912 and 1.016 710 3335 au) and, when Earth is closer to the Sun , the Sun's gravitational field is stronger and Earth is moving faster along its orbital path. As the metre is defined in terms of the second and the speed of light is constant for all ...
The disk rotates at velocities of up to roughly 1,000 km/s (2,200,000 mph) [75] and spans a maximum diameter of 25,000 AU (3.7 trillion km; 2.3 trillion mi). [76] By comparison, Pluto averages 39 AU (5.8 billion km; 3.6 billion mi) from the Sun. Gas accretes onto the black hole at an estimated rate of one solar mass every ten years (about 90 ...
Universal Studios Halloween Horror Nights runs on select nights through Nov. 3 in Hollywood and Orlando. The reporter on this story received access to Halloween Horror Nights from Universal Studios.
The Triangulum Galaxy is a spiral galaxy 2.73 million light-years (ly) from Earth in the constellation Triangulum.It is catalogued as Messier 33 or NGC 598.With the D 25 isophotal diameter of 18.74 kiloparsecs (61,100 light-years), the Triangulum Galaxy is the third-largest member of the Local Group of galaxies, behind the Andromeda Galaxy and the Milky Way.
This is an accepted version of this page This is the latest accepted revision, reviewed on 19 February 2025. Film studio and theme park in the US Universal Studios Hollywood Entrance to the theme park Location Universal City, California Coordinates 34°08′11″N 118°21′22″W / 34.136518°N 118.356051°W / 34.136518; -118.356051 Status Operating Opened April 30, 1912 (1912-04 ...
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