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Infrared Astronomy
Infrared astronomy is a sub-discipline of astronomy which specializes in the astronomical observation, observation and analysis of astronomical objects using infrared (IR) radiation. The wavelength of infrared light ranges from 0.75 to 300 micrometers, and falls in between Visible light, visible radiation, which ranges from 380 to 750 nanometers, and terahertz radiation, submillimeter waves. Infrared astronomy began in the 1830s, a few decades after the discovery of infrared light by William Herschel in 1800. Early progress was limited, and it was not until the early 20th century that conclusive detections of astronomical objects other than the Sun and Moon were made in infrared light. After a number of discoveries were made in the 1950s and 1960s in radio astronomy, astronomers realized the information available outside the visible wavelength range, and modern infrared astronomy was established. Infrared and optical astronomy are often practiced using the same telescopes, as the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomy
Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest include planets, natural satellite, moons, stars, nebulae, galaxy, galaxies, meteoroids, asteroids, and comets. Relevant phenomena include supernova explosions, gamma ray bursts, quasars, blazars, pulsars, and cosmic microwave background radiation. More generally, astronomy studies everything that originates beyond atmosphere of Earth, Earth's atmosphere. Cosmology is a branch of astronomy that studies the universe as a whole. Astronomy is one of the oldest natural sciences. The early civilizations in recorded history made methodical observations of the night sky. These include the Egyptian astronomy, Egyptians, Babylonian astronomy, Babylonians, Greek astronomy, Greeks, Indian astronomy, Indians, Chinese astronomy, Chinese, Maya civilization, M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Absorption (electromagnetic Radiation)
In physics, absorption of electromagnetic radiation is how matter (typically electrons bound in atoms) takes up a photon's energy—and so transforms electromagnetic energy into internal energy of the absorber (for example, thermal energy). A notable effect of the absorption of electromagnetic radiation is attenuation of the radiation; attenuation is the gradual reduction of the intensity of light waves as they propagate through a medium. Although the absorption of waves does not usually depend on their intensity (linear absorption), in certain conditions (optics) the medium's transparency changes by a factor that varies as a function of wave intensity, and saturable absorption (or nonlinear absorption) occurs. Quantifying absorption Many approaches can potentially quantify radiation absorption, with key examples following. * The absorption coefficient along with some closely related derived quantities * The attenuation coefficient (NB used infrequently with meaning ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crookes Radiometer
The Crookes radiometer (also known as a light mill) consists of an airtight glass bulb containing a partial vacuum, with a set of vanes which are mounted on a spindle inside. The vanes rotate when exposed to light, with faster rotation for more intense light, providing a quantitative measurement of electromagnetic radiation intensity. The reason for the rotation was a cause of much scientific debate in the ten years following the invention of the device, but in 1879 the currently accepted explanation for the rotation was published. Today the device is mainly used in physics education as a demonstration of a heat engine run by light energy. It was invented in 1873 by the chemist William Crookes, Sir William Crookes as the by-product of some chemical research. In the course of very accurate quantitative chemical work, he was weighing samples in a partially evacuated chamber to reduce the effect of air currents, and noticed the weighings were disturbed when sunlight shone on the ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ernest Fox Nichols
Ernest Fox Nichols (June 1, 1869 – April 29, 1924) was an American educator and physicist. He served as the 10th President of Dartmouth College. Early life Nichols was born in Leavenworth County, Kansas, and received his undergraduate degree from Kansas State University in 1888. After working for a year in the Chemistry Department at Kansas State, he matriculated to graduate school at Cornell University, where he received degrees in 1893 and 1897. He also studied at the University of Berlin and Cambridge University. Career and death Nichols served as a professor of physics at Colgate University from 1892 to 1898, at Dartmouth College from 1898 to 1903, and Columbia University from 1903 to 1909. Nichols was awarded the Rumford Prize by the American Academy of Arts and Sciences in 1905 for his proof that light exerts pressure. The following year, he was elected to the American Philosophical Society. He was also elected vice president of the National Academy of Sciences. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Piazzi Smyth
Charles Piazzi Smyth (3 January 1819 – 21 February 1900) was a British astronomer who was Astronomer Royal for Scotland from 1846 to 1888; he is known for many innovations in astronomy and, along with his wife Jessica Duncan Piazzi Smyth, his Pyramidology, pyramidological and Pseudoscientific metrology, metrological studies of the Great Pyramid of Giza. Astronomical career Charles Piazzi Smyth (pronounced ) was born in Naples, Kingdom of the Two Sicilies, to Captain (later Admiral) William Henry Smyth and his wife the former Eliza Anne "Annarella" Warington. He was named Piazzi after his Godparent, godfather, the Italian astronomer Giuseppe Piazzi, whose acquaintance his father had made at Palermo when serving in the Mediterranean. His father subsequently settled at Bedford and equipped there an observatory, at which Piazzi Smyth received his first lessons in astronomy. He was educated at Bedford School until the age of sixteen when he became an assistant to Sir Thomas Maclea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wrapped Up For The Cool Cosmos
Wrap, WRAP or Wrapped may refer to: Storage and preservation * Gift wrap or wrap paper, used to enclose a present * Overwrap, a wrapping of items in a package or a wrapping over packages * Plastic wrap, a thin, clear, flexible plastic used to cover food * Shrink wrap, a polymer used to bundle boxes on a pallet for transport * Vehicle wrap, a coloured polymer used to cover a car's paintwork, for advertising purposes or as a cost-effective alternative to a re-spray Arts, entertainment, and media Filmmaking * Wrap (filmmaking), the end of filming on a movie set ** " That's a wrap!", an idiom often used by a director on a film set Music * ''wRAP'' (album), 2002 album from Finnish rapper Kana * "Wrapped" (Gloria Estefan song), the lead single from Gloria Estefan's album ''Unwrapped'' * "Wrapped" (Bruce Robison song), a Bruce Robison song; covered by Kelly Willis in 1998 and George Strait in 2006 * Spotify Wrapped, viral marketing campaign by Spotify Radio * WRAP (Florida), def ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prism (optics)
An optical prism is a transparent optical element with flat, polished surfaces that are designed to refract light. At least one surface must be angled—elements with two parallel surfaces are ''not'' prisms. The most familiar type of optical prism is the triangular prism, which has a triangular base and rectangular sides. Not all optical prisms are geometric prisms, and not all geometric prisms would count as an optical prism. Prisms can be made from any material that is transparent to the wavelengths for which they are designed. Typical materials include glass, acrylic and fluorite. A dispersive prism can be used to break white light up into its constituent spectral colors (the colors of the rainbow) to form a spectrum as described in the following section. Other types of prisms noted below can be used to reflect light, or to split light into components with different polarizations. Types Dispersive ''Dispersive prisms'' are used to break up light into its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SOFIA With Open Telescope Doors
Sofia is the Capital city, capital and List of cities and towns in Bulgaria, largest city of Bulgaria. It is situated in the Sofia Valley at the foot of the Vitosha mountain, in the western part of the country. The city is built west of the Iskar (river), Iskar river and has many mineral springs, such as the Sofia Central Mineral Baths. It has a humid continental climate. Known as Serdica in Classical antiquity, antiquity, Sofia has been an area of human habitation since at least 7000 BC. The recorded history of the city begins with the attestation of the conquest of Serdica by the Roman Republic in 29 BC from the Celtic settlement of Southeast Europe, Celtic tribe Serdi. During the decline of the Roman Empire, the city was raided by Huns, Visigoths, Pannonian Avars, Avars, and Slavs. In 809, Serdica was incorporated into the First Bulgarian Empire by Khan (title), Khan Krum and became known as Sredets. In 1018, the Byzantine Empire, Byzantines ended Bulgarian rule until 1194, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NICMOS Cross Cut
The Near Infrared Camera and Multi-Object Spectrometer (NICMOS) is a scientific instrument for infrared astronomy, installed on the Hubble Space Telescope (HST), operating from 1997 to 1999, and from 2002 to 2008. Images produced by NICMOS contain data from the near-infrared part of the light spectrum. NICMOS was conceived and designed by the NICMOS Instrument Definition Team centered at Steward Observatory, University of Arizona, USA. NICMOS is an imager and multi-object spectrometer built by Ball Aerospace & Technologies Corp. that allows the HST to observe infrared light, with wavelengths between 0.8 and 2.4 micrometers, providing imaging and slitless spectrophotometric capabilities. NICMOS contains three near-infrared detectors in three optical channels providing high (~ 0.1 arcsecond) resolution, coronagraphic and polarimetric imaging, and slitless spectroscopy in 11-, 19-, and 52-arcsecond square fields of view. Each optical channel contains a 256×256 pixel photodiode array ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Webb Space Telescope
The James Webb Space Telescope (JWST) is a space telescope designed to conduct infrared astronomy. As the largest telescope in space, it is equipped with high-resolution and high-sensitivity instruments, allowing it to view objects too old, List of the most distant astronomical objects, distant, or faint for the Hubble Space Telescope. This enables investigations across many fields of astronomy and cosmology, such as observation of the Population III star, first stars and the Galaxy formation and evolution, formation of the first galaxies, and detailed atmospheric characterization of potentially habitable exoplanets. Although the Webb's mirror diameter is 2.7 times larger than that of the Hubble Space Telescope, it produces images of comparable optical resolution, resolution because it observes in the longer-wavelength infrared spectrum. The longer the wavelength of the spectrum, the larger the information-gathering surface required (mirrors in the infrared spectrum or antenna a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Herschel Space Observatory
The Herschel Space Observatory was a space observatory built and operated by the European Space Agency (ESA). It was active from 2009 to 2013, and was the largest infrared telescope ever launched until the launch of the James Webb Space Telescope in 2021. Herschel carries a mirror and instruments sensitive to the Infrared, far infrared and Submillimetre astronomy, submillimetre wavebands (55–672 μm). Herschel was the fourth and final cornerstone mission in the List of European Space Agency programs and missions#Horizon 2000, Horizon 2000 programme, following ''Solar and Heliospheric Observatory, SOHO''/''Cluster II (spacecraft), Cluster II'', ''XMM-Newton'' and ''Rosetta (spacecraft), Rosetta''. The observatory was carried into orbit by an Ariane 5 in May 2009, reaching the Lagrangian point, second Lagrangian point (L2) of the List of objects at Lagrangian points, Earth–Sun system, from Earth, about two months later. Herschel is named after William Herschel, Sir Will ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spitzer Space Telescope
The Spitzer Space Telescope, formerly the Space Infrared Telescope Facility (SIRTF), was an infrared space telescope launched in 2003, that was deactivated when operations ended on 30 January 2020. Spitzer was the third space telescope dedicated to infrared astronomy, following IRAS (1983) and ISO (1995–1998). It was the first spacecraft to use an Earth-trailing orbit, later used by the Kepler planet-finder. The planned mission period was to be 2.5 years with a pre-launch expectation that the mission could extend to five or slightly more years until the onboard liquid helium supply was exhausted. This occurred on 15 May 2009. Without liquid helium to cool the telescope to the very low temperatures needed to operate, most of the instruments were no longer usable. However, the two shortest-wavelength modules of the IRAC camera continued to operate with the same sensitivity as before the helium was exhausted, and continued to be used into early 2020 in the Spitzer Warm Mission ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
