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List Of Star Systems Within 40–45 Light-years
This is a list of star systems within 40-45 light years of Earth. See also * Lists of stars * List of star systems within 35-40 light-years * List of star systems within 45-50 light-years * List of nearest stars and brown dwarfs References {{DEFAULTSORT:List of star systems within 40-45 light-years Lists of stars, star systems within 40–45 light-years Star systems Lists by distance, star systems within 40–45 light-years ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earth
Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large volumes of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surface is made up of the ocean, dwarfing Earth's polar ice, lakes, and rivers. The remaining 29% of Earth's surface is land, consisting of continents and islands. Earth's surface layer is formed of several slowly moving tectonic plates, which interact to produce mountain ranges, volcanoes, and earthquakes. Earth's liquid outer core generates the magnetic field that shapes the magnetosphere of the Earth, deflecting destructive solar winds. The atmosphere of the Earth consists mostly of nitrogen and oxygen. Greenhouse gases in the atmosphere like carbon dioxide (CO2) trap a part of the energy from the Sun close to the surface. Water vapor is widely present in the atmosphere and forms clouds that cover most of the planet. More solar e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HD 10307
HD 10307 (HR 483) is a spectroscopic binary star in the constellation Andromeda. The primary is similar to the Sun in mass, temperature and metal content. situated about 42 light-years from Earth Its companion, HR 483 B, is a little-studied red dwarf. HD 10307 was identified in September 2003 by astrobiologist Margaret Turnbull from the University of Arizona in Tucson as one of the most promising nearby candidates for hosting life based on her analysis of the HabCat list of stars. System HR 483 is a binary located 42.6 ly away, in Andromeda. The two stars orbit one another elliptically ( e=0.44), approaching as close as 4.2 AU and receding to 10.5 AU, with a period of just under twenty years. HD 10307 A, the larger component, is a G-type main-sequence star similar to the Sun, only slightly brighter, hotter, larger, and older than the Sun—though with a slightly smaller mass. It has a low level of activity and is a candidate Maunder minimum analog. HR 483 B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HD 147513
HD 147513 (62 G. Scorpii) is a star in the southern constellation of Scorpius. It was first catalogued by Italian astronomer Piazzi in his star catalogue as "XVI 55". With an apparent magnitude of 5.38, according to the Bortle scale it is visible to the naked eye from suburban skies. Based upon stellar parallax measurements by the Hipparcos spacecraft, HD 147513 lies some 42 light years from the Sun. Properties This is a Sun-like main sequence star with a stellar classification of G1VH-04. It has about 11% greater mass than the Sun, and is considered young with an estimated age of 400 million years. As such, it has a similar luminosity to the Sun despite being more massive. Although the abundance of elements is similar to the Sun, it is a Barium star that is overabundant in elements produced through the s-process. HD 147513 is suspected of being a variable star. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
36 Ursae Majoris
36 Ursae Majoris is a double star in the northern constellation of Ursa Major. With an apparent visual magnitude of 4.8, it can be seen with the naked eye in suitable dark skies. Based upon parallax measurements, this binary lies at a distance of from Earth. The brighter star of the two is a solar analog—meaning it has physical properties that make it similar to the Sun. It has 10% more mass and a radius 17% larger than the Sun, with an estimated age of four billion years. The spectrum of this star matches a stellar classification of F8 V, which indicates this is a main sequence star that is generating energy at its core through the nuclear fusion of hydrogen. The energy is being radiated into space from its outer envelope at an effective temperature of . This gives the star the characteristic yellow-white hue of an F-type star. The fainter of the two stars has an apparent magnitude 8.86 and shares a common proper motion witIts spectral type of K7Ve indicates i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HD 40307
HD 40307 is an orange ( K-type) main-sequence star located approximately 42 light-years away in the constellation of Pictor (the Easel), taking its primary name from its Henry Draper Catalogue designation. It is calculated to be slightly less massive than the Sun. The star has six known planets, three discovered in 2008 and three more in 2012. One of them, HD 40307 g, is a potential super-Earth in the habitable zone, with an orbital period of about 200 days. This object might be capable of supporting liquid water on its surface, although much more information must be acquired before its habitability can be assessed. No stellar companions to HD 40307 were detected as in 2018. History and nomenclature HD 40307 was observed during or before 1900 as part of the Cape Photographic Durchmusterung. The designation ''HD 40307'' is from the Henry Draper Catalogue, which is based on spectral classifications made between 1911 and 1915 by Annie Jump Cannon and her co-workers, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gliese 3707
Gliese may refer to: * Rochus Gliese (1891—1978), a German actor, director, production designer, and art director * Wilhelm Gliese (1915–1993), a German astronomer, best known for the Gliese Catalogue of Nearby Stars * Gliese Catalogue of Nearby Stars, a modern star catalog of stars located within 25 parsecs of the Earth * Gliese 163, a red dwarf located 49 light years from the Sun * Gliese 229, a binary system composed of a red dwarf and a brown dwarf about 19 light years away in the constellation Lepus. * Gliese 581, a red dwarf orbited by several extra-solar planets, at least ** Gliese 581d, a planet in the star's habitable zone * Gliese 667, a triple star system in the constellation of Scorpius containing exoplanet GJ 667 Cc in one of the stars' habitable zone * Gliese 682, a red dwarf in the constellation of Scorpius with two candidate planets, one of which is in the star's habitable zone * Gliese 710 Gliese 710, or HIP 89825, is an orange star in the conste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HD 158633
HD 158633 is a main sequence star in the northern constellation of Draco. With an apparent visual magnitude of 6.43, this star is a challenge to view with the unaided eye but it can be seen clearly with a small telescope. Based upon parallax measurements, it is located at a distance of around 42 light years from the Sun. The star is drifting closer to the Sun with a radial velocity of −39 km/s, and is predicted to come to within in around 190,400 years. This is a K-type main sequence star with a spectral classification of K0 V. It has about 79% of the Sun's radius and 73% of the solar mass. It is an estimated 4.3 billion years old and is spinning with a projected rotational velocity of 3.4 km/s. The star is emitting an excess of infrared radiation at a wavelength of 70 μm, suggesting the presence of an orbiting debris disk. It has a low metallicity, with only 37% of the Sun's abundance of elements more massive than helium, and has a re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2MASS J0523-1403
Mass is an intrinsic property of a body. It was traditionally believed to be related to the quantity of matter in a physical body, until the discovery of the atom and particle physics. It was found that different atoms and different elementary particles, theoretically with the same amount of matter, have nonetheless different masses. Mass in modern physics has multiple definitions which are conceptually distinct, but physically equivalent. Mass can be experimentally defined as a measure of the body's inertia, meaning the resistance to acceleration (change of velocity) when a net force is applied. The object's mass also determines the strength of its gravitational attraction to other bodies. The SI base unit of mass is the kilogram (kg). In physics, mass is not the same as weight, even though mass is often determined by measuring the object's weight using a spring scale, rather than balance scale comparing it directly with known masses. An object on the Moon would weigh less t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
44 Boötis
44 Boötis or i Boötis is a triple star system in the constellation Boötes. It is approximately 41.6 light years from Earth. 44 Boötis can be resolved into two stars, of 5th and 6th magnitudes respectively. They were separated by when the pair were confirmed in 1819, but were only by 2020 as the two orbit every 210 years. The primary component, 44 Boötis A, is a yellow-white stellar classification, G-type main sequence, main sequence dwarf with a mean apparent magnitude of +4.83. The companion component, 44 Boötis B, is a W Ursae Majoris variable spectroscopic binary. The variability of this star system was discovered by English astronomer William Herschel. The brightness of the eclipsing binary varies from magnitude +5.8 to +6.40 with a period of 6.43 hours. The two eclipsing components of the are close enough to allow their stellar envelopes to overlap, or at least nearly so. The 44 Boötis system is from Earth. It also may show signs of an infrared exce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gliese 349 ...
This is the list of notable stars in the constellation Hydra, sorted by decreasing brightness. See also *List of stars by constellation References Bibliography * * * * * {{Stars of Hydra *List Hydra Hydra generally refers to: * Lernaean Hydra, a many-headed serpent in Greek mythology * ''Hydra'' (genus), a genus of simple freshwater animals belonging to the phylum Cnidaria Hydra or The Hydra may also refer to: Astronomy * Hydra (constel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HD 14412
HD 14412 is a single star in the southern constellation of Fornax. It has the Gould designation 22 G. Fornacis, while HD 14412 is the Henry Draper Catalogue designation. The star has an apparent visual magnitude of 6.33, which, according to the Bortle scale, can be dimly seen with the naked eye from rural locations. Based upon an annual parallax shift of , this system is 42 light-years distant from the Sun. It is drifting further away with a radial velocity of +7.5 km/s. This star has a stellar classification of G8V, indicating that it is a main-sequence star. Based upon stellar models, it has 82% of the Sun's mass and 77% of the radius. HD 14412 is spinning with a projected rotational velocity of 3.26 km/s and is about 9.61 billion years old. It is radiating 44% of the luminosity of the Sun from its photosphere at an effective temperature of 5,482 K, giving it the yellow-hued glow of a G-type star. HD 14412 has been examined for signs of an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Innes' Star
Innes' star (Gliese 422) is an M-type dwarf, M3.5-type red dwarf, located in constellation Carina (constellation), Carina. It has around 35% of the mass of the Sun, yet only 1.1% of its luminosity, and an estimated surface temperature of 3,323 Kelvin, K. Discovery Innes' star was discovered in 1920 by Robert T. A. Innes in Union Observatory, Union of South Africa, who had discerned its large proper motion and a parallax of 0.337 arcsec. The discovery was published in ''Circular of the Union Observatory'' No. 49, hence its discovery name is ''UO 49'', or ''In UOC 49''. However, ''UO'' designations should be used with caution since they are often not unique for each star: the number in the name is the number of ''Circular'', so all stars published in one ''Circular'' have identical names. So, all other newfound stars, published in the 49th ''Circular'', may be named ''UO 49'' too. Erroneous parallax It is known for the fact that it had once been considered one of the neare ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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