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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 light-years * List of star systems within 90–95 light-years This is a list of star systems within 90–95 light years of Earth. List See also * List of nearest stars This list covers all known stars, white dwarfs, brown dwarfs, and sub-brown dwarfs within of the Sun. So far, 131 such objects ha ... References {{DEFAULTSORT:Star systems within 85-90 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] |
Equinox
A solar equinox is a moment in time when the Sun appears directly above the equator, rather than to its north or south. On the day of the equinox, the Sun appears to rise directly east and set directly west. This occurs twice each year, around 20 March and 23 September. An equinox is equivalently defined as the time when the plane of Earth's equator passes through the geometric center of the Sun's disk. This is also the moment when Earth's rotation axis is directly perpendicular to the Sun-Earth line, tilting neither toward nor away from the Sun. In modern times, since the Moon (and to a lesser extent the planets) causes Earth's orbit to vary slightly from a perfect ellipse, the equinox is officially defined by the Sun's more regular ecliptic longitude rather than by its declination. The instants of the equinoxes are currently defined to be when the apparent geocentric longitude of the Sun is 0° and 180°. The word is derived from the Latin ', from ' (equal) and ' ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canis Venatici
Canes Venatici ( ) is one of the 88 constellations designated by the International Astronomical Union (IAU). It is a small northern constellation that was created by Johannes Hevelius in the 17th century. Its name is Latin for 'hunting dogs', and the constellation is often depicted in illustrations as representing the dogs of Boötes the Herdsman, a neighboring constellation. Cor Caroli is the constellation's brightest star, with an apparent magnitude of 2.9. La Superba (Y CVn) is one of the reddest naked-eye stars and one of the brightest carbon stars. The Whirlpool Galaxy is a spiral galaxy tilted face-on to observers on Earth, and was the first galaxy whose spiral nature was discerned. In addition, quasar TON 618 is one of the most massive black holes with the mass of 66 billion solar masses. History The stars of Canes Venatici are not bright. In classical times, they were listed by Ptolemy as unfigured stars below the constellation Ursa Major in his star catalogue. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DO Canum Venaticorum
Do, DO or D.O. may refer to: Arts, entertainment and media Music * ''Do'' (Do album), 2004 * ''Do'' (Psychostick album), 2018 * "Do", a song by the White Stripes from the 1999 album ''The White Stripes'' * C (musical note), or Do ** fixed do and movable do solfège * Do, a type of buk drum in Korean ritual music * The Dø, a French–Finnish indie pop band Other uses in arts, entertainment and media * ''The DO'', an online magazine of the American Osteopathic Association * ''Wazir'' (film), 2016, working title ''Do'' Languages * Do-support, in English grammar, the use of the auxiliary verb do to form questions * ''Do'' (kana), or To, a mora symbol in Japanese writing * ''do.'', abbreviation for ditto People * Do (surname), including a list of people with the surname ** Đỗ, a Vietnamese family name * Do (singer) (Dominique Rijpma van Hulst, born 1981), Dutch singer * D.O. (entertainer) (Doh Kyung-soo, born 1993), South Korean singer and actor * D.O. (rapper) (a.k.a. Defy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boötes (constellation)
Boötes ( ) is a constellation in the northern sky, located between 0° and +60° declination, and 13 and 16 hours of right ascension on the celestial sphere. The name comes from , which comes from 'herder, herdsman' or 'plowman' (literally, 'ox-driver'; from ''boûs'' 'cow'). One of the 48 constellations described by the 2nd-century astronomer Ptolemy, Boötes is now one of the 88 modern constellations. It contains the List of brightest stars, fourth-brightest star in the night sky, the orange giant Arcturus. Epsilon Boötis, or Izar, is a colourful multiple star popular with amateur astronomers. Boötes is home to many other bright stars, including eight above the fourth magnitude and an additional 21 above the fifth magnitude, making a total of 29 stars easily visible to the naked eye. History and mythology In ancient Babylon, the stars of Boötes were known as SHU.PA. They were apparently depicted as the god Enlil, who was the leader of the Babylonian religion, Babyloni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
18 Boötis
18 Boötis is a single star in the northern constellation of Boötes, located about 85 light years away from the Sun. It is visible to the naked eye as a faint, yellow-white hued star with an apparent visual magnitude of 5.41. This object is a suspected member of the Ursa Major Moving Group, based on velocity criteria. It has a magnitude 10.84 optical companion at an angular separation of along a position angle of 219°, as of 2010. This is an F-type main-sequence star with a stellar classification of F3 V. Older surveys gave a class of F5 IV, showing the luminosity class of a subgiant star. It shows strong evidence for short-term chromospheric variability, although it is not optically variable. 18 Boötis is an estimated 1.15 billion years old and is spinning with a projected rotational velocity of 40.5 km/s. It has 1.3 times the mass of the Sun and 1.4 times the Sun's radius. The star is radiating 3.9 times the luminosity of the Sun from its photosph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HD 60532
HD 60532 is a star with two orbiting exoplanets in the southern constellation of Puppis. The designation ''HD 60532'' takes its name from the ''Henry Draper Catalogue''. The system is located at a distance of 85.5 light year A light-year, alternatively spelled light year (ly or lyr), is a unit of length used to express astronomical distance, astronomical distances and is equal to exactly , which is approximately 9.46 trillion km or 5.88 trillion mi. As defined by t ...s from the Sun, and is drifting further away with a radial velocity of 61 km/s. At that distance, the star has an apparent visual magnitude of 4.45, which is bright enough to be faintly visible to the naked eye. The motion of this system through space brought it within of the Sun some 408,600 years ago. The stellar spectrum, spectrum of this star shows blended features of an F-type main-sequence star and an stellar evolution, evolving subgiant star, with a corresponding stellar classificat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
