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Namaka (moon)
Namaka is the smaller, inner moon of the trans-Neptunian dwarf planet Haumea. It is named after Nāmaka, the goddess of the sea in Hawaiian mythology and one of the daughters of Haumea. Discovery Namaka was discovered on 30 June 2005 and announced on 29 November 2005. It was nicknamed " Blitzen" by the discovery team before being assigned an official name. Physical characteristics Namaka is only 1.5% as bright as its parent dwarf planet Haumea and is about 0.05% its mass. If it turns out to have a similar albedo, it would be about 170 km in diameter. Photometric observations indicate that its surface is made of water ice. Mutual events between 2009 and 2011 were expected to improve the knowledge of the orbits and masses of the components of the Haumean system, but interpreting those observations was greatly complicated by the unexpected non-tidally locked spin state of Hiʻiaka, the larger moon. Namaka is similar in size to Makemake Makemake (minor-planet designatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hubble Space Telescope
The Hubble Space Telescope (often referred to as HST or Hubble) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation. It was not the first space telescope, but it is one of the largest and most versatile, renowned both as a vital research tool and as a public relations boon for astronomy. The Hubble telescope is named after astronomer Edwin Hubble and is one of NASA's Great Observatories. The Space Telescope Science Institute (STScI) selects Hubble's targets and processes the resulting data, while the Goddard Space Flight Center (GSFC) controls the spacecraft. Hubble features a mirror, and its five main instruments observe in the ultraviolet, visible, and near-infrared regions of the electromagnetic spectrum. Hubble's orbit outside the distortion of Earth's atmosphere allows it to capture extremely high-resolution images with substantially lower background light than ground-based telescopes. It has recorded some of the most detaile ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haumea (mythology)
Haumea ( Hawaiian: ) is the goddess of fertility and childbirth in Hawaiian mythology. She is the mother of many important deities, such as Pele, Kāne Milohai, Kāmohoaliʻi, Nāmaka, Kapo, and Hiʻiaka. Haumea is one of the most important Hawaiian gods, and her worship is among the oldest on the Hawaiian islands. She was finally killed by Kaulu. Mythology With the help of a magic stick called the Makalei, Haumea repeatedly transforms herself from an old woman to a young girl, and returns to her homeland periodically to marry one of her offspring, thus giving birth to continuous generations of humans. Eventually, her identity is found out, which angers her, causing her to leave humanity behind. Haumea is said to have given humans the ability to give birth naturally. In a story, she visited Muleiula, the daughter of a chieftain who was experiencing painful childbirth, during which she discovered that humans only gave birth by cutting open the mother. Seeing this, Haumea create ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discoveries By Michael E
Discoveries may refer to: Music * ''Discoveries'' (Cannonball Adderley album), 1955 * ''Discoveries'' (Josh Nelson album), 2011 * ''Discoveries'' (Northlane album), 2011 Other uses * ''Discoveries'' (film), a 1939 British film * Discoveries (horse), a racehorse * ''Discoveries'' (Robertson Davies), a 2002 book by Robertson Davies * ''Discoveries'' (TV series), a Canadian youth science television series which aired on CBC Television in 1957 * ''Abrams Discoveries'', a series of illustrated non-fiction books published by Harry N. Abrams * ''Discoveries'', a work by William Butler Yeats, written in 1907 * ''Discoveries'', a magazine published by Cedars-Sinai Medical Center See also * Age of Discoveries * Discovery (other) Discovery may refer to: * Discovery (observation), observing or finding something unknown * Discovery (fiction), a character's learning something unknown * Discovery (law), a process in courts of law relating to evidence Discovery, The Discov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trans-Neptunian Satellites
A trans-Neptunian object (TNO), also written transneptunian object, is any minor planet in the Solar System that orbits the Sun at a greater average distance than Neptune, which has a semi-major axis of 30.1 astronomical units (au). Typically, TNOs are further divided into the classical and resonant objects of the Kuiper belt, the scattered disc and detached objects with the sednoids being the most distant ones. As of October 2020, the catalog of minor planets contains 678 numbered and more than 2,000 unnumbered TNOs. The first trans-Neptunian object to be discovered was Pluto in 1930. It took until 1992 to discover a second trans-Neptunian object orbiting the Sun directly, 15760 Albion. The most massive TNO known is Eris, followed by Pluto, , , and . More than 80 satellites have been discovered in orbit of trans-Neptunian objects. TNOs vary in color and are either grey-blue (BB) or very red (RR). They are thought to be composed of mixtures of rock, amorphous carbon a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moons Of Haumea
The outer Solar System planetoid Haumea has two known moons, Hiʻiaka and Namaka, named after Hawaiian goddesses. These small moons were discovered in 2005, from observations of Haumea made at the large telescopes of the W. M. Keck Observatory in Hawaii. Haumea's moons are unusual in a number of ways. They are thought to be part of its extended collisional family, which formed billions of years ago from icy debris after a large impact disrupted Haumea's ice mantle. Hiʻiaka, the larger, outermost moon, has large amounts of pure water ice on its surface, which is rare among Kuiper belt objects. Namaka, about one tenth the mass, has an orbit with surprising dynamics: it is unusually eccentric and appears to be greatly influenced by the larger satellite. History Two small satellites were discovered around Haumea (which was at that time still designated 2003 EL61) through observations using the W.M. Keck Observatory by a Caltech team in 2005. The outer and larger of the two sa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MK2 (moon)
S/2015 (136472) 1, nicknamed MK2 by the discovery team, is the only known moon of the trans-Neptunian dwarf planet Makemake. It is estimated to be in diameter (for an assumed albedo of 4%) and has a semi-major axis at least from Makemake. Its orbital period is ≥ 12 days (the minimum values are those for a circular orbit; the actual orbital eccentricity is unknown). Observations leading to its discovery occurred in April 2015, using the ''Hubble Space Telescope'' Wide Field Camera 3, and its discovery was announced on 26 April 2016. Makemake and are the least-well-known of the large trans-Neptunian objects. The discovery of MK2 and follow-up observations in 2018 will enable Makemake's mass to be determined, which will allow an estimate of its density and other characteristics. Observations A preliminary examination of the discovery imagery suggests that MK2 has a reflectivity similar to charcoal, making it an extremely dark object. This is somewhat surprising because Makem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Makemake
Makemake (minor-planet designation 136472 Makemake) is a dwarf planet and – depending on how they are defined – the second-largest Kuiper belt object in the classical population, with a diameter approximately 60% that of Pluto. It has one known satellite. Its extremely low average temperature, about , means its surface is covered with methane, ethane, and possibly nitrogen ices. Makemake was discovered on March 31, 2005 by a team led by Michael E. Brown, and announced on July 29, 2005. It was initially known as and later given the minor-planet number 136472. In July 2008, it was named after Makemake, a creator god in the Rapa Nui mythology of Easter Island, under the expectation by the International Astronomical Union (IAU) that it would prove to be a dwarf planet. History Discovery Makemake was discovered on March 31, 2005, by a team at the Palomar Observatory, led by Michael E. Brown, and was announced to the public on July 29, 2005. The team had planned to d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albedo
Albedo (; ) is the measure of the diffuse reflection of sunlight, solar radiation out of the total solar radiation and measured on a scale from 0, corresponding to a black body that absorbs all incident radiation, to 1, corresponding to a body that reflects all incident radiation. Surface albedo is defined as the ratio of Radiosity (radiometry), radiosity ''J''e to the irradiance ''E''e (flux per unit area) received by a surface. The proportion reflected is not only determined by properties of the surface itself, but also by the spectral and angular distribution of solar radiation reaching the Earth's surface. These factors vary with atmospheric composition, geographic location, and time (see position of the Sun). While bi-hemispherical reflectance is calculated for a single angle of incidence (i.e., for a given position of the Sun), albedo is the directional integration of reflectance over all solar angles in a given period. The temporal resolution may range from seconds (as ob ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blitzen The Reindeer
In traditional festive legend and popular culture, Santa Claus's reindeer are said to pull a sleigh through the night sky to help Santa Claus deliver gifts to children on Christmas Eve. The number of reindeer characters, and the names given to them (if any) vary in different versions, but those frequently cited in the United States are the eight listed in Clement Clarke Moore's 1823 poem ''A Visit from St. Nicholas'', the work that is largely responsible for the reindeer becoming popularly known. In the poem the reindeers' names are given as Dasher, Dancer, Prancer, Vixen, Comet, Cupid, Donner and Blitzen. The popularity of Robert L. May's 1939 storybook ''Rudolph the Red-Nosed Reindeer'', and Gene Autry's 1949 Christmas song "Rudolph the Red-Nosed Reindeer", resulted in Rudolph often being included as the ninth character. Many other variations in reindeer names and number have appeared in fiction, music, film and TV. Origins and history Single reindeer The first referen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hawaiian Mythology
Hawaiian religion refers to the indigenous religious beliefs and practices of native Hawaiians, also known as the kapu system. Hawaiian religion is based largely on the tapu religion common in Polynesia and likely originated among the Tahitians and other Pacific islanders who landed in Hawaii between 500 and 1300 AD. It is polytheistic and animistic, with a belief in many deities and spirits, including the belief that spirits are found in non-human beings and objects such as other animals, the waves, and the sky. It was only during the reign of Kamehameha I that a ruler from Hawaii island attempted to impose a singular "Hawaiian" religion on all the Hawaiian islands that was not Christianity. Today, Hawaiian religious practices are protected by the American Indian Religious Freedom Act. Traditional Hawaiian religion is unrelated to the modern New Age practice known as " Huna".Rothstein, Mikael, in Lewis, James R. and Daren Kemp. ''Handbook of New Age''. Brill Academic Publisher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haumea
Haumea (minor-planet designation 136108 Haumea) is a dwarf planet located trans-Neptunian object, beyond Neptune's orbit. It was discovered in 2004 by a team headed by Michael E. Brown, Mike Brown of Caltech at the Palomar Observatory in the United States and disputably also in 2005 by a team headed by José Luis Ortiz Moreno at the Sierra Nevada Observatory in Spain, though the latter claim has been contested. On September 17, 2008, it was named after Haumea (mythology), Haumea, the Hawaiian goddess of childbirth, under the expectation by the International Astronomical Union (IAU) that it would prove to be a dwarf planet. Nominal estimates make it the List of Solar System objects by size, third-largest known trans-Neptunian object, after Eris (dwarf planet), Eris and Pluto, though the uncertainty in best-fit modeling slightly overlaps with the larger size estimates for Makemake (dwarf planet), Makemake. (ESO 21 November 2012 press releaseDwarf Planet Makemake Lacks Atmosphere Haume ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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