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Search For Extraterrestrial Intelligence
The search for extraterrestrial intelligence (usually shortened as SETI) is an expression that refers to the diverse efforts and scientific projects intended to detect extraterrestrial signals, or any evidence of intelligent life beyond Earth. Researchers use methods such as monitoring electromagnetic radiation, searching for optical signals, and investigating potential extraterrestrial artifacts for any signs of transmission from civilizations present on other planets. Some initiatives have also attempted to send messages to hypothetical alien civilizations, such as NASA's Voyager Golden Record, Golden Record. Modern SETI research began in the early 20th century after the advent of radio, expanding with projects like Project Ozma, the Wow! signal detection, and the Breakthrough Listen initiative; a $100 million, 10-year attempt to detect signals from nearby stars, announced in 2015 by Stephen Hawking and Yuri Milner. Since the 1980s, international efforts have been ongoing, wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arecibo Observatory Aerial View
Arecibo (; ) is a Arecibo barrio-pueblo, city and Municipalities of Puerto Rico, municipality on the northern coast of Puerto Rico, on the shores of the Atlantic Ocean, located north of Utuado, Puerto Rico, Utuado and Ciales, Puerto Rico, Ciales; east of Hatillo, Puerto Rico, Hatillo; and west of Barceloneta, Puerto Rico, Barceloneta and Florida, Puerto Rico, Florida. It is about west of San Juan, Puerto Rico, San Juan, the capital city. Arecibo is the largest municipality in Puerto Rico by area, and it is the core city of the Puerto Rico statistical areas, Arecibo Metropolitan Statistical Area and part of the greater San Juan–Caguas–Guaynabo metropolitan area, San Juan–Bayamón, PR Combined statistical area, Combined Statistical Area. It is spread over 18 ''barrios'' and Arecibo barrio-pueblo, Arecibo Pueblo (the downtown area and the administrative center of the city). Its population in 2020 was 87,754. The Arecibo Observatory, which housed the Arecibo telescope, the wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avon (publishers)
Avon Publications is a leading publisher of romance fiction. At Avon's initial stages, it was an American paperback book and comic book publisher. The shift in content occurred in the early 1970s with multiple Avon romance titles reaching and maintaining spots in bestseller lists, demonstrating the market and potential profits in romance publication. As of 2010, Avon is an imprint of HarperCollins. Early history (1941–1971) Avon Books was founded in 1941 by the American News Company (ANC) to create a rival to Pocket Books. They hired brother and sister Joseph Meyers and Edna Meyers Williams to establish the company. ANC bought out J.S. Ogilvie Publications, a dime novel publisher partly owned by both the Meyers, and renamed it "Avon Publications". They also got into comic books. "The early Avons were somewhat similar in appearance to the existing paperbacks of Pocket Books, resulting in an immediate and largely ineffective lawsuit by that company. Despite this superfi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Francis Jenkins
Charles Francis Jenkins (August 22, 1867 – June 6, 1934) was an American engineer who was a pioneer of early cinema and one of the inventors of television, though he used mechanical rather than electronic technologies. His businesses included Charles Jenkins Laboratories and Jenkins Television Corporation (the corporation being founded in 1928, the year the Laboratories were granted the first commercial television license in the United States). Over 400 patents were issued to Jenkins, many for his inventions related to motion pictures and television . Jenkins was born in Dayton, Ohio, grew up near Richmond, Indiana, where he went to school and went to Washington, D.C. in 1890, where he worked as a stenographer. Motion pictures Jenkins started experimenting with motion pictures in 1891, and eventually quit his job and concentrated fully on the development of his own movie projector, the Phantoscope. As the ''Richmond Telegram'' reported on June 6, 1894, about his en ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amherst College
Amherst College ( ) is a Private college, private Liberal arts colleges in the United States, liberal arts college in Amherst, Massachusetts, United States. Founded in 1821 as an attempt to relocate Williams College by its then-president Zephaniah Swift Moore, Amherst is the third oldest institution of higher education in List of colleges and universities in Massachusetts, Massachusetts. The institution was named after the town, which in turn had been named after Jeffery Amherst, 1st Baron Amherst, Jeffery, Lord Amherst, Commander-in-Chief of British forces of North America during the French and Indian War. Originally established as a Men's colleges, men's college, Amherst became Mixed-sex education, coeducational in 1975. Amherst is an exclusively undergraduate four-year institution; 1,971 students were enrolled in fall 2021. Admissions are highly selective. Students choose courses from 42 major programs in an Curriculum#Open curriculum, open curriculum and are not required to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wavelength
In physics and mathematics, wavelength or spatial period of a wave or periodic function is the distance over which the wave's shape repeats. In other words, it is the distance between consecutive corresponding points of the same ''phase (waves), phase'' on the wave, such as two adjacent crests, troughs, or zero crossings. Wavelength is a characteristic of both traveling waves and standing waves, as well as other spatial wave patterns. The multiplicative inverse, inverse of the wavelength is called the ''spatial frequency''. Wavelength is commonly designated by the Greek letter lambda (''λ''). For a modulated wave, ''wavelength'' may refer to the carrier wavelength of the signal. The term ''wavelength'' may also apply to the repeating envelope (mathematics), envelope of modulated waves or waves formed by Interference (wave propagation), interference of several sinusoids. Assuming a sinusoidal wave moving at a fixed phase velocity, wave speed, wavelength is inversely proportion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Airship
An airship, dirigible balloon or dirigible is a type of aerostat (lighter-than-air) aircraft that can navigate through the air flying powered aircraft, under its own power. Aerostats use buoyancy from a lifting gas that is less dense than the surrounding air to achieve the lift (physics), lift needed to stay airborne. In early dirigibles, the lifting gas used was hydrogen gas, hydrogen, due to its high lifting capacity and ready availability, but the inherent flammability led to several fatal accidents that rendered hydrogen airships obsolete. The alternative lifting gas, helium gas is not flammable, but is rare and relatively expensive. Significant amounts were first discovered in the United States and for a while helium was only available for airship usage in North America. Most airships built since the 1960s have used helium, though some have used thermal airship, hot air. The envelope of an airship may form the gasbag, or it may contain a number of gas-filled cells. An air ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Naval Observatory
The United States Naval Observatory (USNO) is a scientific and military facility that produces geopositioning, navigation and timekeeping data for the United States Navy and the United States Department of Defense. Established in 1830 as the Depot of Charts and Instruments, it is one of the oldest scientific agencies in the United States, and remains the country's leading facility for astronomical and timing data. The observatory is located in Northwest Washington, D.C. at the northwestern end of Embassy Row. It is among the few pre-20th century astronomical observatories located in an urban area. In 1893, in an effort to escape light pollution, it was relocated from Foggy Bottom near the city's center, to its Northwest Washington, D.C. location. The USNO has conducted significant scientific studies throughout its history, including measuring the speed of light, observing solar eclipses, and discovering the moons of Mars. Its achievements include providing data for the first ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
