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[1] The Principal Galaxies Catalogue (PGC) is an astronomical catalog published in 1989 that lists B1950 and J2000 equatorial coordinates and cross-identifications for 73,197 galaxies. It is based on the Lyon-Meudon Extragalactic Database (LEDA), which was originally started in 1983. [2] 40,932 coordinates (56%) have standard deviations smaller ...
The Sega Genesis, known as the Mega Drive [1] in regions outside of North America, is a 16-bit video game console that was designed and produced by Sega. First released in Japan on October 29, 1989, in North America on August 14, 1989, and in PAL regions in 1990, the Genesis is Sega's third console and the successor to the Master System.
Abell 1689 is one of the biggest and most massive galaxy clusters known and acts as a gravitational lens, distorting the images of galaxies that lie behind it. [4] It has the largest system of gravitational arcs ever found.
The Master System. The Master System which was renamed with a redesigned casing from the original Sega Mark III, which had been released in the Japanese market in 1985—is a video game console released by Sega in the North American market in September 1986 to compete with the Nintendo Entertainment System, which had been released in the same market in February 1986 (an earlier test market for ...
HD1 is one of the earliest and most distant known galaxies yet identified in the observable universe, having a spectroscopic redshift of z = 13.27, meaning that the light from the galaxy travelled for 13.5 billion years on its way to Earth, which due to the expansion of the universe, corresponds to a proper distance of approximately 33.4 billion light-years (10.2 billion parsecs).
A dwarf galaxy is a small galaxy composed of about 1000 up to several billion stars, as compared to the Milky Way's 200–400 billion stars. [1] The Large Magellanic Cloud, which closely orbits the Milky Way and contains over 30 billion stars, [2] is sometimes classified as a dwarf galaxy; others consider it a full-fledged galaxy. Dwarf ...
M60-UCD1's dynamical mass is 200 ± 30 million solar masses (M ☉). [1] Colours and lack of colour gradients indicate a uniform stellar population about 14.5 ± 0.5 billion years old (indistinguishable from the age of the Universe). [1] [6] Their metallicity is similar to that of the Sun.
Quatermass [1] Quatermass and the Pit: 1967: Quatermass [1] Queen of Blood: 1966 [294] Queen of Outer Space: 1958 [193] A Quiet Place: 2018: A Quiet Place [295] A Quiet Place: Day One: 2024: A Quiet Place: A Quiet Place Part II: 2021: A Quiet Place: A Quiet Place Part III: 2025: A Quiet Place: Race to Witch Mountain: 2009: Witch Mountain [296 ...