|
Namaka (moon)
Namaka, formal designation (136108) Haumea II, is the smaller, inner moon of the trans-Neptunian dwarf planet Haumea. Discovered in 2005, it is named after Nāmaka, the goddess of the sea in Hawaiian mythology and one of the daughters of Haumea. Namaka is notable for its unusual, highly-perturbed orbit that is heavily influenced by the larger, outer moon Hiiaka. 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 observa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hubble Space Telescope
The Hubble Space Telescope (HST or Hubble) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation. It was not the Orbiting Solar Observatory, first space telescope, but it is one of the largest and most versatile, renowned as a vital research tool and as a public relations boon for astronomy. The Hubble Space Telescope is named after astronomer Edwin Hubble and is one of NASA's Great Observatories program, 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 spectrum, visible, and near-infrared regions of the electromagnetic spectrum. Hubble's orbit outside the distortion of atmosphere of Earth, Earth's atmosphere allows it to capture extremely high-resolution images with substantially lower background lig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nāmaka
In Hawaiian mythology, Nāmaka (or Nā-maka-o-Kahai, the eyes of Kahai) appears as a sea goddess in the Pele family. She is an older sister of Pele-honua-mea. She is the daughter of Ku-waha-ilo and Haumea, whose other children are Pele, the Hiʻiaka sisters, the Kama brothers, and the bird Halulu. Nāmaka takes as her husband ʻAukelenuiaʻīkū, who had arrived in Lalakeenuiakane or in Kahiki (Tahiti), but he later becomes the husband of her sister Pele, and because of this Pele, the Hiiaka sisters, Malulani, and Kaʻōhelo migrate to Hawaii. When Pele quarrels with her powerful sister Nāmaka , Nāmaka sends tidal waves to destroy Pele's lands and homes. Helped by her family, Pele fights Nāmaka, but Nāmaka defeats her. In Thrum's Kane-huna-moku myth, Nāmaka is called the chiefess of the Mu and Menehune people when they are summoned to build the watercourse for Kikiaola at Waimea on Kauai. When Pele causes a conflagration by staying too close to the fire god Lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discoveries By Michael E
Discoveries may refer to: Media Film and television * ''Discoveries'' (film), a 1939 British film * ''Discoveries'' (TV series), a Canadian youth science television series * "Discoveries", a Series D episode of the television series ''QI'' (2006) * "Discoveries" (''Hotel Portofino''), a 2022 TV episode Literature * ''Discoveries'' (Robertson Davies), a 2002 book by Robertson Davies * ''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 Music * ''Discoveries'' (Cannonball Adderley album), 1955 * ''Discoveries'' (Josh Nelson album), 2011 * ''Discoveries'' (Northlane album), 2011 Other uses * Discoveries (horse), a racehorse See also * Age of Discoveries * Discovery (other) * Explorations (other) Exploration is the process of discovery. Exploration or explorations may ... [...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 an orbital 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 February 2025, the catalog of minor planets contains 1006 numbered and more than 4000 unnumbered TNOs. However, nearly 5900 objects with semimajor axis over 30 AU are present in the MPC catalog, with 1009 being numbered. 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moons Of Haumea
The dwarf planet Haumea has two known moons, Hiiaka 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. Hiiaka, 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 satellites was d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MK2 (moon)
S/2015 (136472) 1, unofficially 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 and has a semi-major axis of at least from Makemake. Its orbital period is at least 12 days if it has a circular orbit. Observations leading to its discovery occurred in April 2015, using the Hubble Space Telescope's Wide Field Camera 3, and its discovery was announced on 26 April 2016. Physical characteristics S/2015 (136472) 1 is extremely faint, with an apparent magnitude of 25 in visible light. The satellite is 1,300 times fainter than Makemake, which corresponds to a magnitude difference of 7.80 between it and Makemake. Prior to the discovery S/2015 (136472) 1, measurements of Makemake's far-infrared thermal emission by the '' Spitzer'' and '' Herschel'' space telescopes showed that the dwarf planet emits more thermal radiation than expected for its size and brightness in visible light. This led astr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Makemake
Makemake ( minor-planet designation: 136472 Makemake) is a dwarf planet and the largest of what is known as the classical population of Kuiper belt objects, with a diameter approximately that of Saturn's moon Iapetus, or 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 shows signs of geothermal activity and thus may be capable of supporting active geology and harboring an active subsurface ocean. 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, 20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albedo
Albedo ( ; ) is the fraction of sunlight that is Diffuse reflection, diffusely reflected by a body. It is 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 directional-hemispherical reflectance factor 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blitzen The Reindeer
In traditional Western 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. While various legends offer differing details, the 1823 poem '' A Visit from St. Nicholas'' (usually attributed to Clement Clarke Moore) has proved the most enduring. It describes Santa's sleigh being pulled by a team of eight reindeer, best known as Dasher, Dancer, Prancer, Vixen, Comet, Cupid, Donner, and Blitzen. The popularity of the 1939 story "Rudolph the Red-Nosed Reindeer", and the 1949 Christmas song of the same name, has resulted in Rudolph often being included among the team. Origins and history Single reindeer The first reference to Santa's sleigh being pulled by a reindeer appears in " Old Santeclaus with Much Delight", an 1821 illustrated children's poem published in New York. The names of the author and the illustrator are not known. The poem, with eight colored litho ... [...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. She was killed by Kaulu. Haumea is one of the most important Hawaiian gods, and her worship is among the oldest on the Hawaiian islands. Mythology With the help of a magic stick called the Mākālei, 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 by Kio, 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dwarf Planet
A dwarf planet is a small planetary-mass object that is in direct orbit around the Sun, massive enough to be hydrostatic equilibrium, gravitationally rounded, but insufficient to achieve clearing the neighbourhood, orbital dominance like the eight classical planets of the Solar System. The prototypical dwarf planet is Pluto, which for decades was regarded as a planet before the "dwarf" concept was adopted in 2006. Dwarf planets are capable of being geologically active, an expectation that was borne out in 2015 by the ''Dawn (spacecraft), Dawn'' mission to and the ''New Horizons'' mission to Pluto. planetary geology, Planetary geologists are therefore particularly interested in them. Astronomers are in general agreement that at least the List of possible dwarf planets#Likeliest dwarf planets, nine largest candidates are dwarf planets – in rough order of diameter, , , , , , , , , and . A considerable uncertainty remains over the tenth largest candidate , which may thus be co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
