Planetary science Planetary science An Achondrite is a stony meteorite that is made of material similar to terrestrial basalts or plutonic rocks. Compared to the chondrites, they have all been differentiated and reprocessed to a lesser or greater degree due to melting and recrystallization on or within meteorite parent bodies. As a result, achondrites have distinct textures and mineralogies indicative of igneous processes. ...more on Wikipedia about "Achondrite"
An albedo feature is a large area on the surface of a planet (or other solar system body) which shows a contrast in brightness or darkness ( albedo) with adjacent areas. ...more on Wikipedia about "Albedo feature"
The American Meteor Society, Ltd. (AMS) is a non-profit scientific organization established to encourage and support the research activities of both amateur and professional astronomers who are interested in the field of Meteor Astronomy. Its affiliates observe, monitor, collect data on, study, and report on meteors, meteor showers, meteoric fireballs, and related meteoric phenomena. The society was founded in 1911 by Dr. Charles P. Olivier of the Leander McCormick Observatory. ...more on Wikipedia about "American Meteor Society"
(Arachnoid (astrogeology)) This article incorporates text from a public-domain NASA website. ...more on Wikipedia about "Arachnoid (astrogeology)"
Astrogeology is a planetary science discipline concerned with the geology of the celestial bodies such as the planets and their moons, asteroids, comets, and meteorites. Alternatively known as planetary geology or exogeology. ...more on Wikipedia about "Astrogeology"
Axial tilt is an astronomical term regarding the inclination angle of a planet's rotational axis in relation to its orbital plane. It is also called axial inclination or obliquity. ...more on Wikipedia about "Axial tilt"
The Center for Planetary Science at the University of Copenhagen was created in February 2001 when the planetary science groups from NBIfAFG and DSRI were merged. Together with associated national and international groups it aims to strengthen planetary research in Denmark and to provide a platform for the education of planetary researchers. It spans a broad range of disciplines from astronomy, physics, geophysics, and space instrumentation to geology and biology. ...more on Wikipedia about "Center for Planetary Research"
http://www.shortopedia.com never sleeps.
Cosmochemistry is concerned with the origin and development of the elements and their isotopes in the universe. It is connected to astrophysics, in particular to the physics of stars and supernovas. In particular, cosmochemistry is also concerned with origin and the development of elements and their isotopes in our solar system and therefore cosmochemistry is also important in planetology and for the investigation of origin and development of our solar system. Many contributions to cosmochemistry are from the research of meteorites, because meteorites are, together with samples from moon, currently the only extraterrestrial samples available for investigation in terrestrial laboratories. ...more on Wikipedia about "Cosmochemistry"
A Cryovolcano is literally, an icy volcano. Cryovolcanoes form on icy moons, ...more on Wikipedia about "Cryovolcano"
Diogenites are achondritic stony meteorites that originate from deep within the crust of the asteroid 4 Vesta, and as such are part of the HED meteorite group. There are about 40 distinct members known. ...more on Wikipedia about "Diogenite"
Eucrites are achondritic stony meteorites that originate from the surface of the asteroid 4 Vesta, and as such are part of the HED meteorite group. They are the most common achondrite group with well over 100 distinct finds at present. ...more on Wikipedia about "Eucrite"
A geomagnetic storm is a temporary disturbance of the Earth's magnetosphere. Associated with solar coronal mass ejections (CME), coronal holes, or solar flares, a geomagnetic storm is caused by a solar wind shock wave which typically stikes the Earth's magnetic field 24 to 36 hours after the event. This only happens if the shock wave travels in a direction toward Earth. The solar wind pressure on the magnetosphere will increase or decrease depending on the Sun's activity. These solar wind pressure changes modify the electric currents in the ionosphere. Magnetic storms usually last 24 to 48 hours, but some may last for many days. ...more on Wikipedia about "Geomagnetic storm"
A lunar occultation occurs when the moon, moving along its orbital path, passes in front of a star or other celestial object, as seen by an observer (normally on the Earth). A grazing lunar occultation (also lunar grazing occultation, lunar graze, or just graze) occurs when one of the two edges of the moon parallel to its orbital path appears to just touch or graze the star as the moon goes by. When this happens, a properly positioned observer will see the grazed star disappear and reappear, possibly several times, as mountains and valleys on the edge of the moon pass in front of it. ...more on Wikipedia about "Grazing lunar occultation"
The HED meteorites are a grouping of three achondrite meteorite types, the: ...more on Wikipedia about "HED meteorite" Inform your friends about http://www.shortopedia.com
Howardites are achondritic stony meteorites that originate from the surface of the asteroid 4 Vesta, and as such are part of the HED meteorite group. There are about 50 distinct members known. ...more on Wikipedia about "Howardite"
Hydridic Earth theory is a hypothesis proposed in 1968 by a Soviet geologist Vladimir Larin. The theory contradicts the generally acepted views on Earth composition and structure. The theory makes certain prediction that can be falsified or proven through experiments. ...more on Wikipedia about "Hydridic Earth theory"
An impact crater (impact basin or sometimes crater) is a circular depression on a surface, usually referring to a planet, moon, asteroid, or other celestial body, caused by a collision of a smaller body ( meteorite) with the surface. ...more on Wikipedia about "Impact crater"
Impact events are caused by the collision of large meteoroids, asteroids or comets (generically: bolides) with Earth and may sometimes be followed by mass extinctions of life. For discussion of impacts in general, not just on Earth, see impact crater. ...more on Wikipedia about "Impact event"
The International Meteor Organization (IMO) was founded in 1988 and has several hundred members. IMO was created in response to an ever-growing need for international cooperation of meteor amateur work. The collection of meteor observations by several methods from all around the world ensures the comprehensive study of meteor showers and their relation to comets and interplanetary dust. ...more on Wikipedia about "International Meteor Organization"
Macula (pl. maculae) is the Latin word for 'spot'. It is used in planetary geology to refer to unusually dark areas on the surface of a planet or moon. ...more on Wikipedia about "Macula (planetary geology)"
The magnetosheath refers to the region of space between the magnetopause and the bow shock of a planet's magnetosphere. The regularly organized magnetic field generated by the planet becomes weak and irregular in the magnetosheath due to interaction with the incoming solar wind, and is incapable of fully deflecting the highly charged particles. The density of the particles in this region is considerably lower than what is found beyond the bow shock, but greater than within the magnetopause, and can be considered a transitory state. ...more on Wikipedia about "Magnetosheath"
(Magnetosphere) (Please see "Note to Users" at end!) ...more on Wikipedia about "Magnetosphere"
The Earth's mantle is the layer in the structure of the Earth that lies directly under the Earth's crust and above the Earth's outer core. The term is also applied to the structure of other planets. Earth's mantle lies roughly between 30 and 2,900 km below the surface. ...more on Wikipedia about "Mantle (geology)"
The Meteoritical Society is a non-profit scholarly organization founded in 1933 to promote the study of extraterrestrial materials and their history. ...more on Wikipedia about "Meteoritical Society"
An oblate spheroid is ellipsoid having a shorter axis and two equal longer axes. ...more on Wikipedia about "Oblate"
This article is licensed under the GNU Free Documentation License.
It uses material from the Wikipedia . Direct links to the original articles are in the text.
If you use exact copy or modified of this article you should preserve above paragraph and put also : It uses material from
the Shortopedia article about "Planetary science".
| MAIN PAGE | MAIN INDEX | CONTACT US |