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Interstellar Messages
This is a list of notable interstellar radio messages (IRMs) transmitted from Earth. Many of these were sent in the aim of searching for extra-terrestrial intelligence (SETI), and are often called ' active SETI' or 'METI' (Messages to Extra-Terrestrial Intelligence) projects. Notable transmissions Stars to which messages were sent include: Other projects Some other projects include: * Poetica Vaginal () * Discovery Channel Message (2005) * Craigslist Messages (2005) * CNES Cosmic Connexion (2006) * Doritos Advert (2008) * Sent Forever * Penguin UK Whilst not an interstellar message, it is also worth mentioning The Morse Message (1962), which was sent to Venus Venus is the second planet from the Sun. It is often called Earth's "twin" or "sister" planet for having almost the same size and mass, and the closest orbit to Earth's. While both are rocky planets, Venus has an atmosphere much thicker .... References External links Classification of interstella ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Interstellar Communication
Interstellar communication is the transmission of signals between planetary systems. Sending interstellar messages is potentially much easier than interstellar travel, being possible with technologies and equipment which are currently available. However, the distances from Earth to other potentially inhabited systems introduce prohibitive delays, assuming the limitations of the speed of light. Even an immediate reply to radio communications sent to stars tens of thousands of light-years away would take many human generations to arrive. Radio The SETI project has for the past several decades been conducting a search for signals being transmitted by extraterrestrial life located outside the Solar System, primarily in the radio frequencies of the electromagnetic spectrum. Special attention has been given to the Waterhole (radio), Water Hole, the frequency of one of neutral hydrogen's absorption lines, due to the low background noise at this frequency and its symbolic association with t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gliese 49
Gliese 49 is a star in the northern constellation of Cassiopeia. Visually, it is located 106 arcminutes north of the bright star γ Cassiopeiae. With an apparent visual magnitude of 9.56, it is not observable with the naked eye. It is located, based on the parallax of Gaia (), 32.1 light-years away from the Solar System. The star is drifting closer to the Sun with a radial velocity of −6 km/s. This object is a red dwarf star of spectral type M1.5V. Much dimmer than the Sun, it has a total luminosity that is 4.9% that of the Sun; it is, however, much brighter than other nearby red dwarfs such as Proxima Centauri or Wolf 359. It has an effective temperature of . Its mass is 52% that of the Sun, and 51% of its radius. It rotates on its axis with a projected rotation speed of under 2 km/s, and has a rotation period of 18.86 days. It has a metallic content similar to that of the Sun, with its index of metallicity / H= +0.03. Although its age is not known ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teegarden's Star
Teegarden's Star (''SO J025300.5+165258'', ''2MASS J02530084+1652532'', ''LSPM J0253+1652'') is an stellar classification, M-type red dwarf star in the constellation Aries (constellation), Aries, from the Solar System. Although it is List of nearest stars and brown dwarfs, near Earth it is a dim apparent magnitude, magnitude 15 and can only be seen through large telescopes. This star was found to have a very large proper motion of about 5 arcseconds per year. Only seven stars with such large proper motions are currently known. Teegarden's Star hosts a planetary system with at least three planets. Discovery Teegarden's Star was discovered in 2003 using asteroid-tracking data that had been collected years earlier. This data set is a digital archive created from optical images taken over a five-year period by the Near-Earth Asteroid Tracking (NEAT) program using two 1 m telescopes on Maui, Hawaii. The star is named after the discovery team leader, Bonnard J. Teegar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MIT News
The MIT News is an official publication of the Massachusetts Institute of Technology The Massachusetts Institute of Technology (MIT) is a Private university, private research university in Cambridge, Massachusetts, United States. Established in 1861, MIT has played a significant role in the development of many areas of moder .... , it includes a web site, a daily newsletter, the MIT Daily, and a weekly newsletter, the MIT Weekly. It is edited by the MIT News Office. It started publication in September 1994.MIT Library Catalo/ref> See also * '' MIT Tech Talk'', MIT weekly official newspaper from 1957 to 2009 References External links Official site Massachusetts Institute of Technology publications {{News-website-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RuBisCO
Ribulose-1,5-bisphosphate carboxylase/oxygenase, commonly known by the abbreviations RuBisCo, rubisco, RuBPCase, or RuBPco, is an enzyme () involved in the light-independent (or "dark") part of photosynthesis, including the carbon fixation by which atmospheric carbon dioxide is converted by plants and other photosynthetic organisms to energy-rich molecules such as glucose. It emerged approximately four billion years ago in primordial metabolism prior to the presence of oxygen on Earth. It is probably the most abundant enzyme on Earth. In chemical terms, it catalyzes the carboxylation of ribulose-1,5-bisphosphate (also known as RuBP). Alternative carbon fixation pathways RuBisCO is important biologically because it catalyzes the primary chemical reaction by which inorganic carbon enters the biosphere. While many autotrophic bacteria and archaea fix carbon via the reductive acetyl CoA pathway, the 3-hydroxypropionate cycle, or the reverse Krebs cycle, these pathways are r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TZ Arietis
TZ Arietis (also known as Gliese 83.1, GJ 9066, or L 1159-16) is a red dwarf in the northern constellation of Aries. With a normal apparent visual magnitude of 12.3, it is too faint to be seen by the naked eye, although it lies relatively close at a distance of . It is a flare star, which means it can suddenly increase in brightness for short periods of time. Variability William E. Kunkel announced that TZ Arietis is a variable star in 1968. It is a flare star, showing brief increases in brightness due to eruptions from its surface. In the ultraviolet, flares of over a magnitude have been observed. In addition it shows longterm variations in brightness which may be due to starspots and rotation, possibly classifying it as a BY Draconis variable. It was given the variable star designation TZ Arietis in 1970. Planetary system In a preprint submitted to arXiv in June 2019, three candidate planets were reported in orbit around this star (GJ 83.1) with orbital periods of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hello From Earth
Active SETI (Active Search for Extra-Terrestrial Intelligence) are attempts to send messages to intelligent extraterrestrial life. Active SETI messages are predominantly sent in the form of radio signals. Physical messages like that of the Pioneer plaque may also be considered an active SETI message. Active SETI is also known as METI (Messaging to Extra-Terrestrial Intelligence). Whether humans should engage in Active SETI is controversial due to concerns about potential impacts of extraterrestrial contact, sparking a vigorous policy debate. History 'Active SETI' was a term as early as 2005, though some decades after the term SETI. The term METI was coined in 2006 by Russian scientist Alexander Zaitsev, who proposed a subtle distinction between Active SETI and METI: Concern over METI was raised by the science journal ''Nature'' in an editorial in October 2006, which commented on a recent meeting of the International Academy of Astronautics SETI study group. The editor sa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A Message From Earth
Gliese 581c (Gl 581c or GJ 581c) is an exoplanet orbiting within the Gliese 581 system. It is the second planet discovered in the system and the third in order from the star. With a mass about 6.8 times that of the Earth, it is classified as a super-Earth (a category of planets with masses greater than Earth's up to ten Earth masses). At the time of its discovery in 2007, Gliese 581c gained interest from astronomers because it was reported to be the first potentially Earth-like planet in the habitable zone of its star, with a temperature right for liquid water on its surface, and, by extension, potentially capable of supporting extremophile forms of Earth-like life. However, further research cast doubt upon the planet's habitability. Based on newer models of the habitable zone, the planet is likely too hot to be potentially habitable. In astronomical terms, the Gliese 581 system is relatively close to Earth, at in the direction of the constellation of Libra (constellation), Li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
