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List Of Star Systems Within 80–85 Light-years
This is a list of star systems within 80–85 light years of Earth. Most data from this list come from thSIMBADdatabase. List See also * List of Stars * List of nearest stars * List of star systems within 75–80 light-years * List of star systems within 85–90 light-years This is a list of star systems within 85–90 light years of Earth. The closest M-type red giant star, Gacrux, is in this list. Most data from this list come from thSIMBADdatabase. List See also * List of star systems within 80–85 lig ... References {{DEFAULTSORT:Star systems within 80-85 light-years Lists of stars Star systems Lists by distance ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earth
Earth is the third planet from the Sun and the only astronomical object known to Planetary habitability, harbor life. This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water. Almost all of Earth's water is contained in its global ocean, covering Water distribution on Earth, 70.8% of Earth's crust. The remaining 29.2% of Earth's crust is land, most of which is located in the form of continental landmasses within Earth's land hemisphere. Most of Earth's land is at least somewhat humid and covered by vegetation, while large Ice sheet, sheets of ice at Polar regions of Earth, Earth's polar polar desert, deserts retain more water than Earth's groundwater, lakes, rivers, and Water vapor#In Earth's atmosphere, atmospheric water combined. Earth's crust consists of slowly moving tectonic plates, which interact to produce mountain ranges, volcanoes, and earthquakes. Earth's outer core, Earth has a liquid outer core that generates a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stellar Parallax
Stellar parallax is the apparent shift of position (''parallax'') of any nearby star (or other object) against the background of distant stars. By extension, it is a method for determining the distance to the star through trigonometry, the stellar parallax method. Created by the different orbital positions of Earth, the extremely small observed shift is largest at time intervals of about six months, when Earth arrives at opposite sides of the Sun in its orbit, giving a baseline (the shortest side of the triangle made by a star to be observed and two positions of Earth) distance of about two astronomical units between observations. The parallax itself is considered to be half of this maximum, about equivalent to the observational shift that would occur due to the different positions of Earth and the Sun, a baseline of one astronomical unit (AU). Stellar parallax is so difficult to detect that its existence was the subject of much debate in astronomy for hundreds of years. Thomas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HD 44594
HD 44594 is a star in the southern constellation Puppis. It has an apparent visual magnitude of 6.64, so it can be seen with the naked eye from the southern hemisphere under good viewing conditions. Based upon parallax measurements, it is located at a distance of from the Earth, giving it an absolute magnitude of 4.56. Measurement of the star's spectrum show it to match a stellar classification of G1.5V, which is close to the Sun's spectral class of G2V. In the wavelength range 3,250–8,750 Â, the energy emission of this star is very similar to the Sun, and thus it is considered a solar analog. The luminosity class 'V' means this is a main sequence star that is generating energy through the thermonuclear fusion of hydrogen at its core. The effective temperature of the outer envelope of HD 44594 is 5,840 K, which is giving it the characteristic yellow hue of a G-type star. This star has about 108% of the Sun's mass and is about the same radius as the Sun. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HD 19394
HD may refer to: Business * H-D or Harley-Davidson, a motorcycle manufacturer * The Home Depot, NYSE stock symbol: HD Chemistry * Hydrogen deuteride, a diatomic compound of hydrogen and deuterium * Mustard gas Codes * Air Do, formerly Hokkaido International Airlines, IATA designator * HD postcode area, covering Huddersfield, Brighouse and Holmfirth in England, UK * Heidelberg's vehicle registration plate code * Hunedoara County (Romania)'s ISO 3166 code Medicine * Hansen's disease or leprosy * Hirschsprung's disease, a disorder of the abdomen * Huntington's disease, a genetic disorder affecting the central nervous system ** HD (gene) or huntingtin, the IT15 gene, which codes for the huntingtin protein People * H.D. or Hilda Doolittle (1886–1961), American poet and novelist Other uses * ''Helsingborgs Dagblad'', a Swedish newspaper * Henry Draper Catalogue, an astronomical catalogue often used to designate stars * Department of Highways (other) * ''H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LHS 231
The initials LHS are used for: Schools Australia * Leumeah High School, New South Wales * Lyneham High School, Australian Capital Territory * Lurnea High School, New South Wales United Kingdom * Larbert High School, Stenhousemuir, Scotland * Litherland High School, Liverpool, England United States * Lafayette High School (other) * Lahainaluna High School, Maui, Hawai’i * Lamar High School (other) * Lanphier High School, Springfield, Illinois * Lawrence High School (other) * Lebanon High School (other) * Lee High School (other) * Legacy High School (other) * Lejeune High School, Jacksonville, North Carolina * Leominster High School, Leominster, Massachusetts * Leonia High School, Leonia, New Jersey * Lexington High School (other) * Lincoln High School (other) * Linganore High School, Frederick Co, Maryland * Liverpool High School, Liverpool, New York * Longmeadow High School, Longmeadow, Massachusetts * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cetus
Cetus () is a constellation, sometimes called 'the whale' in English. The Cetus (mythology), Cetus was a sea monster in Greek mythology which both Perseus and Heracles needed to slay. Cetus is in the region of the sky that contains other water-related constellations: Aquarius (constellation), Aquarius, Pisces (constellation), Pisces and Eridanus (constellation), Eridanus. Features Ecliptic Cetus is not among the 12 true zodiac constellations in the Epoch (astronomy), J2000 epoch, nor classical 12-part zodiac. The ecliptic passes less than 0.25° from one of its corners. Thus the Moon and planets will enter Cetus (occulting any stars as a foreground object) in 50% of their successive orbits briefly, and the southern part of the Sun appears in Cetus for about 14 hours each year on March 27 to 28. Many asteroids in belts have longer phases occulting the north-western part of Cetus, those with a slightly greater inclination to the ecliptic than the Moon and planets. Astronomy on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gamma Ceti
Gamma Ceti (γ Ceti, abbreviated Gamma Cet, γ Cet) is a triple star system in the celestial equator, equatorial constellation of Cetus (constellation), Cetus. It has a combined apparent visual magnitude of 3.47. Based upon stellar parallax, parallax measurements, this star is located at a distance of about 80 light-years (24.4 parsecs) from the Sun. The three components are designated Gamma Ceti A (officially named Kaffaljidhma , the traditional name for the entire system), B and C. Nomenclature ''γ Ceti'' (Latinisation of names, Latinised to ''Gamma Ceti'') is the system's Bayer designation. The designations of the three components as ''Gamma Ceti A'', ''B'' and ''C'' derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU). The close pair AB is also designated Hipparcos, HIP 12706, Henry Draper Catalogue, HD 16970, and Bright Star Catalogue, HR 804. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
