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Ellen Howell
Ellen Susanna Howell (born 1961; also published as Ellen S. Bus) is an American astronomer and planetary scientist who studies the composition and structure of asteroids and comets within the Solar System. She is a research professor at the Lunar and Planetary Laboratory of the University of Arizona, and a team member for the OSIRIS-REx sample-and-return space mission. Education and career Howell majored in geophysics at the California Institute of Technology, graduating in 1981. Returning to graduate study, she completed a Ph.D. in planetary sciences at the University of Arizona in 1995. After postdoctoral research at the Arecibo Observatory from 1995 to 1999, and continuing as a research associate at Arecibo until 2015, she returned to the University of Arizona in 2015 as a senior research scientist. Research In 1977, Howell discovered asteroid 3598 Saucier using the Palomar Observatory. She named it after her grandmother, Agnes Elizabeth Saucier. In the same year, Schelte J ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Planetary Science
Planetary science (or more rarely, planetology) is the scientific study of planets (including Earth), celestial bodies (such as moons, asteroids, comets) and planetary systems (in particular those of the Solar System) and the processes of their formation. It studies objects ranging in size from micrometeoroids to gas giants, with the aim of determining their composition, dynamics, formation, interrelations and history. It is a strongly interdisciplinary field, which originally grew from astronomy and Earth science, and now incorporates many disciplines, including planetary geology, cosmochemistry, atmospheric science, physics, oceanography, hydrology, theoretical planetary science, glaciology, and exoplanetology. Allied disciplines include space physics, when concerned with the effects of the Sun on the bodies of the Solar System, and astrobiology. There are interrelated observational and theoretical branches of planetary science. Observational research ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
(136617) 1994 CC
is a sub-kilometer triple asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo asteroid, Apollo group. Discovery was discovered by Spacewatch's Jim Scotti at Kitt Peak National Observatory on 3 February 1994. In June 2009 it was shown to be a triple system, i.e. the largest body is orbited by two minor-planet moon, satellites; only about one percent (1%) of near-Earth asteroids observed by a radar are found to be triple systems such as this one. The only other unambiguously identified triple asteroids in the near-Earth population are , which was discovered to be a triple system in 2008, and 3122 Florence, which was found to be a triple system in 2017. Observations A team of NASA's Jet Propulsion Laboratory (JPL) (Pasadena, California) scientists led by Marina Brozovic and Lance Benner, made the discovery using radar imaging at NASA's Goldstone Solar System Radar on June 12 and June 14, 2009. They showed that the near-Earth asteroid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
