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It was originally named the Andromeda Nebula and is cataloged as Messier 31, M31, and NGC 224. Andromeda has a D 25 isophotal diameter of about 46.56 kiloparsecs (152,000 light-years ) [ 8 ] and is approximately 765 kpc (2.5 million light-years) from Earth.
This is a list of known galaxies within 3.8 megaparsecs (12.4 million light-years) of the Solar System, in ascending order of heliocentric distance, or the distance to the Sun. This encompasses about 50 major Local Group galaxies, and some that are members of neighboring galaxy groups , the M81 Group and the Centaurus A/M83 Group , and some ...
To visualize that scale, if the Sun were a ping-pong ball, Proxima Centauri would be a pea about 1,100 km (680 mi) away, and the Milky Way would be about 30 million km (19 million mi) wide. Although stars are more common near the centers of each galaxy, the average distance between stars is still 160 billion (1.6 × 10 11 ) km (100 billion mi).
This is the lower bound, as it is remotest galaxy observable with the naked eye. It is 12 million light-years away. Redshift cannot be used to infer distance, because it is moving toward us faster than cosmological expansion. Messier 101: 1930– Using the pre-1950s Cepheid measurements, M101 was one of the most distant so measured. [citation ...
For objects at very great distances (far beyond the Milky Way), this relationship must be adjusted for redshifts and for non-Euclidean distance measures due to general relativity. [29] [30] For planets and other Solar System bodies, the apparent magnitude is derived from its phase curve and the distances to the Sun and observer. [31]
The Pisces Dwarf (LGS 3), one of the small Local Group member galaxies, is located 2,022 × 10 ^ 3 ly (620 kpc) from the Sun. It is 20° from the Andromeda Galaxy and 11° from Triangulum. As LGS 3 lies at a distance of 913 × 10 ^ 3 ly (280 kpc) from both galaxies, it could be a satellite galaxy of either Andromeda or Triangulum.
Comet C2023-A3, or Tsuchinshan-ATLAS, was pictured about 99.4 million miles away from Earth by NASA astronaut Matthew Dominick using long-duration photography on a camera programmed for high ...
The closest encounter to the Sun so far predicted is the low-mass orange dwarf star Gliese 710 / HIP 89825 with roughly 60% the mass of the Sun. [4] It is currently predicted to pass 0.1696 ± 0.0065 ly (10 635 ± 500 au) from the Sun in 1.290 ± 0.04 million years from the present, close enough to significantly disturb the Solar System's Oort ...