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Stephenson 2
Stephenson 2 , also known as RSGC2 (''Red Supergiant Cluster 2''), is a young massive open cluster belonging to the Milky Way galaxy. It was discovered in 1990 as a cluster of red supergiants in a photographic, deep infrared survey by the astronomer Charles Bruce Stephenson, after whom the cluster is named. It is located in the constellation Scutum at the distance of about 6 kpc from the Sun. It is likely situated at the intersection of the northern end of the Long Bar of the Milky Way and the inner portion of the Scutum–Centaurus Arm—one of the two major spiral arms. Description 26 red supergiants have been confirmed as members of the cluster, far more than any other known cluster, both in and out of the Milky Way. This includes Stephenson 2-18, which is one of the largest stars currently known. A more recent study has identified around 80 red supergiants in the line of sight of Stephenson 2, approximately 40 of them with radial velocities consistent with being ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stephenson 2-18 Zoomed In, 2MASS Survey, 2003
Stephenson is a medieval patronymic surname meaning "son of Stephen". The earliest public record is found in the county of Huntingdonshire in 1279. There are variant spellings including Stevenson. People with the surname include: *Ashley Stephenson (born 1982), Canadian hockey and baseball player *Ashley Stephenson (1927–2021), British horticulturalist * Benjamin Stephenson (other), several people *Ben Stephenson, Anglo-American television executive *Chandler Stephenson (born 1994), Canadian ice hockey player *Charles Bruce Stephenson (1929–2001), American astronomer *D. C. Stephenson (1891–1966), American, Ku Klux Klan leader *Debra Stephenson (born 1972), British actress *Dwight Stephenson, American football player *Earl Stephenson (born 1947), American baseball pitcher *Gene Stephenson, American college baseball coach *George Stephenson (1781–1848), British mechanical engineer who created Stephenson's Rocket *George Robert Stephenson (engineer) (1819–1905), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Mass
The solar mass () is a standard unit of mass in astronomy, equal to approximately . It is often used to indicate the masses of other stars, as well as stellar clusters, nebulae, galaxies and black holes. It is approximately equal to the mass of the Sun. This equates to about two nonillion (short scale), two quintillion (long scale) kilograms or 2000 quettagrams: The solar mass is about times the mass of Earth (), or times the mass of Jupiter (). History of measurement The value of the gravitational constant was first derived from measurements that were made by Henry Cavendish in 1798 with a torsion balance. The value he obtained differs by only 1% from the modern value, but was not as precise. The diurnal parallax of the Sun was accurately measured during the transits of Venus in 1761 and 1769, yielding a value of (9 arcseconds, compared to the present value of ). From the value of the diurnal parallax, one can determine the distance to the Sun from the geometry o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stephenson 2 DFK 8
Stephenson is a medieval patronymic surname meaning "son of Stephen". The earliest public record is found in the county of Huntingdonshire in 1279. There are variant spellings including Stevenson. People with the surname include: *Ashley Stephenson (born 1982), Canadian hockey and baseball player *Ashley Stephenson (1927–2021), British horticulturalist * Benjamin Stephenson (other), several people *Ben Stephenson, Anglo-American television executive *Chandler Stephenson (born 1994), Canadian ice hockey player *Charles Bruce Stephenson (1929–2001), American astronomer *D. C. Stephenson (1891–1966), American, Ku Klux Klan leader *Debra Stephenson (born 1972), British actress *Dwight Stephenson, American football player *Earl Stephenson (born 1947), American baseball pitcher *Gene Stephenson, American college baseball coach *George Stephenson (1781–1848), British mechanical engineer who created Stephenson's Rocket *George Robert Stephenson (engineer) (1819–1905), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stephenson 2 DFK 6
Stephenson is a medieval patronymic surname meaning "son of Stephen". The earliest public record is found in the county of Huntingdonshire in 1279. There are variant spellings including Stevenson. People with the surname include: *Ashley Stephenson (born 1982), Canadian hockey and baseball player *Ashley Stephenson (1927–2021), British horticulturalist * Benjamin Stephenson (other), several people *Ben Stephenson, Anglo-American television executive *Chandler Stephenson (born 1994), Canadian ice hockey player *Charles Bruce Stephenson (1929–2001), American astronomer *D. C. Stephenson (1891–1966), American, Ku Klux Klan leader *Debra Stephenson (born 1972), British actress *Dwight Stephenson, American football player *Earl Stephenson (born 1947), American baseball pitcher *Gene Stephenson, American college baseball coach *George Stephenson (1781–1848), British mechanical engineer who created Stephenson's Rocket *George Robert Stephenson (engineer) (1819–1905), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stephenson 2 DFK 5
Stephenson is a medieval patronymic surname meaning "son of Stephen". The earliest public record is found in the county of Huntingdonshire in 1279. There are variant spellings including Stevenson. People with the surname include: *Ashley Stephenson (born 1982), Canadian hockey and baseball player *Ashley Stephenson (1927–2021), British horticulturalist * Benjamin Stephenson (other), several people *Ben Stephenson, Anglo-American television executive *Chandler Stephenson (born 1994), Canadian ice hockey player *Charles Bruce Stephenson (1929–2001), American astronomer *D. C. Stephenson (1891–1966), American, Ku Klux Klan leader *Debra Stephenson (born 1972), British actress *Dwight Stephenson, American football player *Earl Stephenson (born 1947), American baseball pitcher *Gene Stephenson, American college baseball coach *George Stephenson (1781–1848), British mechanical engineer who created Stephenson's Rocket *George Robert Stephenson (engineer) (1819–1905), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stephenson 2 DFK 3
Stephenson is a medieval patronymic surname meaning "son of Stephen". The earliest public record is found in the county of Huntingdonshire in 1279. There are variant spellings including Stevenson. People with the surname include: *Ashley Stephenson (born 1982), Canadian hockey and baseball player *Ashley Stephenson (1927–2021), British horticulturalist * Benjamin Stephenson (other), several people *Ben Stephenson, Anglo-American television executive *Chandler Stephenson (born 1994), Canadian ice hockey player *Charles Bruce Stephenson (1929–2001), American astronomer *D. C. Stephenson (1891–1966), American, Ku Klux Klan leader *Debra Stephenson (born 1972), British actress *Dwight Stephenson, American football player *Earl Stephenson (born 1947), American baseball pitcher *Gene Stephenson, American college baseball coach *George Stephenson (1781–1848), British mechanical engineer who created Stephenson's Rocket *George Robert Stephenson (engineer) (1819–1905), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stephenson 2 DFK 2
Stephenson is a medieval patronymic surname meaning "son of Stephen". The earliest public record is found in the county of Huntingdonshire in 1279. There are variant spellings including Stevenson. People with the surname include: *Ashley Stephenson (born 1982), Canadian hockey and baseball player *Ashley Stephenson (1927–2021), British horticulturalist * Benjamin Stephenson (other), several people *Ben Stephenson, Anglo-American television executive *Chandler Stephenson (born 1994), Canadian ice hockey player *Charles Bruce Stephenson (1929–2001), American astronomer *D. C. Stephenson (1891–1966), American, Ku Klux Klan leader *Debra Stephenson (born 1972), British actress *Dwight Stephenson, American football player *Earl Stephenson (born 1947), American baseball pitcher *Gene Stephenson, American college baseball coach *George Stephenson (1781–1848), British mechanical engineer who created Stephenson's Rocket *George Robert Stephenson (engineer) (1819–1905), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Radius
Solar radius is a unit of distance used to express the size of stars in astronomy relative to the Sun. The solar radius is usually defined as the radius to the layer in the Sun's photosphere where the optical depth equals 2/3: :1\,R_ = 6.957\times 10^8 \hbox is approximately 10 times the average radius of Jupiter, about 109 times the radius of the Earth, and 1/215th of an astronomical unit, the distance of the Earth from the Sun. It varies slightly from pole to equator due to its rotation, which induces an oblateness in the order of 10 parts per million. Measurements The unmanned SOHO spacecraft was used to measure the radius of the Sun by timing transits of Mercury across the surface during 2003 and 2006. The result was a measured radius of . Haberreiter, Schmutz & Kosovichev (2008) determined the radius corresponding to the solar photosphere to be . This new value is consistent with helioseismic estimates; the same study showed that previous estimates using inflection poin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
K Band (infrared)
In infrared astronomy, the K band is an atmospheric transmission window centered on 2.2 μm (in the near-infrared 136 THz range). HgCdTe-based detectors are typically preferred for observing in this band. See also * Absolute magnitude * UBV photometric system The UBV photometric system (from ''Ultraviolet, Blue, Visual''), also called the Johnson system (or Johnson-Morgan system), is a photometric system usually employed for classifying stars according to their colors. It was the first standardized ... References Electromagnetic spectrum Infrared imaging {{physics-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alicante 10
Alicante 10, also known as RSGC6 (''Red Supergiant Cluster 6''), is a young massive open cluster belonging to the Milky Way galaxy. It was discovered in 2012 in the 2MASS survey data. Currently, eight red supergiants have been identified in this cluster. Alicante 10 is located in the constellation Scutum at the distance of about 6000 pc from the Sun. It is likely situated at the intersection of the northern end of the Long Bar of the Milky Way and the inner portion of the Scutum–Centaurus Arm—one of the two major spiral arms. The age of Alicante 10 is estimated to be around 16–20 million years. The observed red supergiants are type II supernova progenitors. The cluster is heavily obscured and have not been detected in the visible light. It lies close to other groupings of red supergiants known as RSGC1, Stephenson 2 (RSGC2), RSGC3, Alicante 8 Alicante 8, also known as RSGC4, (''Red Supergiant Cluster 4'') is a young massive open cluster belonging to the Milky ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alicante 8
Alicante 8, also known as RSGC4, (''Red Supergiant Cluster 4'') is a young massive open cluster belonging to the Milky Way galaxy. It was discovered in 2010 in the 2MASS survey data. As of 2010, the only members of the cluster that are currently identified are 8–13 red supergiants—young massive stars undergoing helium burning in their cores. The cluster is located in the constellation Scutum at the distance of about from the Sun. It is likely situated at the intersection of the northern end of the Long Bar of the Milky Way and the inner portion of the Scutum–Centaurus Arm—one of the two major spiral arms. The age of Alicante 8 is estimated to be around 16–20 million years. The observed red supergiants are type II supernova progenitors. The cluster is heavily obscured and have not been detected in the visible light. It lies close to other groupings of red supergiants known as RSGC1 RSGC1 (''Red Supergiant Cluster 1'') is a young massive open cluster in the M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alicante 7
Alicante 7, also known as RSGC5, (''Red Supergiant Cluster 5'') is an open cluster rich in red supergiants found in the Scutum-Crux Arm of the Milky Way Galaxy, along with RSGC1, Stephenson 2, RSGC3, Alicante 8, and Alicante 10 Alicante 10, also known as RSGC6 (''Red Supergiant Cluster 6''), is a young massive open cluster belonging to the Milky Way galaxy. It was discovered in 2012 in the 2MASS survey data. Currently, eight red supergiants have been identified in .... Alicante 7 contains 7 red supergiants, making it one of the most massive open clusters known. Notes References Scutum (constellation) Open clusters Scutum–Centaurus Arm {{star-cluster-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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