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NGC 2683 is an unbarred spiral galaxy discovered by William Herschel on 5 February 1788. From 1782 to 1802, and most intensively from 1783 to 1790, Herschel conducted systematic surveys in search of "deep-sky" or non-stellar objects with two 20-foot-focal-length (610 cm), 12-and-18.7-inch-aperture (30 and 47 cm) telescopes (in combination with ...
Caroline Lucretia Herschel [1] ( / ˈhɜːrʃəl, ˈhɛər -/; [2] 16 March 1750 – 9 January 1848) was a German-born British astronomer, [3] whose most significant contributions to astronomy were the discoveries of several comets, including the periodic comet 35P/Herschel–Rigollet, which bears her name. [4] She was the younger sister of ...
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. The galaxy's name stems from the area of Earth's sky in which it appears, the constellation ...
Mercury, Venus, Mars, Jupiter and Saturn were identified by ancient Babylonian astronomers in the 2nd millennium BC. [7] They were correctly identified as orbiting the Sun by Aristarchus of Samos, and later in Nicolaus Copernicus ' heliocentric system [8] ( De revolutionibus orbium coelestium, 1543) Venus. 2nd Planet.
1995 — First detection of small-scale structure in the cosmic microwave background. 1995 — Hubble Deep Field survey of galaxies in field 144 arc seconds across. 1998 — The 2dF Galaxy Redshift Survey maps the large-scale structure in a section of the Universe close to the Milky Way. 1998 — The Hubble Deep Field South is compiled.
The Andromeda Galaxy (M31) has satellite galaxies just like the Milky Way. Orbiting M31 are at least 13 dwarf galaxies: the brightest and largest is M110, which can be seen with a basic telescope. The second-brightest and closest one to M31 is M32. The other galaxies are fainter, and were mostly discovered starting from the 1970s.
The Sun was found to be part of a galaxy made up of more than 10 10 stars (10 billion stars). The existence of other galaxies, one of the matters of the great debate, was settled by Edwin Hubble, who identified the Andromeda nebula as a different galaxy, and many others at large distances and receding, moving away from our galaxy.
Although Uranus was the first planet to be discovered by telescope, it is just about visible with the naked eye. Bode consulted older star charts and found numerous examples of the planet's position being given while being mistaken for a star, for example, John Flamsteed, Astronomer Royal in Britain, had listed it in his catalogue of 1690 as a ...