Alpha Regio is a region of the planet Venus extending for about 1500 kilometers centered at 22°S, 5°E.
It was discovered and named by Dick Goldstein in 1964. The name was approved by the International Astronomical Union's Working Group for Planetary System Nomenclature (IAU/WGPSN) between 1976 and 1979. Maxwell Montes, Alpha Regio, and Beta Regio are the three exceptions to the rule that the surface features of Venus are to be named for females: women or goddesses.
The surface of the region is what is known as Tessera, meaning a terrain that has been highly deformed and where the deformation strikes in multiple directions and is closely spaced. The term comes from the Greek word for “tiled” (Russian investigators analyzing Venera 15 and Venera 16 imagery thought this terrain looked like a parquet floor). Like all tessera regions, it sits above the surrounding terrain at an elevation of 1 to 2 kilometers, and is heavily deformed by what appears to be contractional folding. Like most tessera units, the surrounding volcanic plains appear to have flowed around Alpha's margins and thus are younger than Alpha.
An infrared map prepared by the Venus Express orbiter shows that the rocks on the Alpha Regio plateau is lighter in colour and look old compared to the majority of the planet. On Earth, such light-coloured rocks are usually granite and form continents.
- ^ Butrica, Andrew J., SP-4218 To See the Unseen, Chapter 5: Normal Science, NASA, 1996
- ^ Butrica, Andrew J., SP-4218 To See the Unseen, Chapter 6: Pioneering on Venus and Mars, NASA, 1996
- ^ New map hints at Venus' wet, volcanic past | International Space Fellowship
Tue, 04 Dec 2012 06:56:41 -0800
Click to Open Overlay Gallery An oblique radar image of Sapas Mons, a volcano on Venus. This image was taken in 1993 by the Magellan mission that mapped the surface of Venus. The lighter colors on the image are younger lava flows from Sapas Mons, ...
Science 2.0 (blog)
Tue, 14 Jan 2014 04:50:42 -0800
The surface of Venus is totally hostile to Earth life, a dim, hot furnace, with temperatures well over 400°C. But conditions are different at the Venus cloud tops. Temperatures are ideal, with plenty of light. The atmosphere is out of equilibrium, with ...
Wed, 11 Jul 2012 10:54:36 -0700
Maxwell Montes, named after James Clerk Maxwell, which was approved in the late 70s — before the female-only Venutian naming rules came into effect. The other two notable exceptions to the rule are Alpha Regio and Beta Regio, two formations named ...
Tue, 14 Jul 2009 04:32:05 -0700
The new map shows that the rocks on the Phoebe and Alpha Regio plateaus are lighter in color and look old compared to the majority of the planet. On Earth, such light-colored rocks are usually granite and form continents. Granite is formed when ancient ...
European Space Agency
Tue, 03 Apr 2007 07:47:22 -0700
New images and data from ESA's mission to Venus provide new insights into the turbulent and noxious atmosphere of Earth's sister planet. What causes violent winds and turbulences? Is the surface topography playing a role in the complex global dynamics ...
Wed, 18 Mar 2015 21:00:21 -0700
Najzaujímavejšie sa nachádzajú okolo krátera Stuart na východe oblasti Alpha Regio. Radar tiež odhalil na vysočinách viaceré ložiská sedimentov. Skúmanie vysočín Venuše, označovaných ako tesserae, môže priniesť poznatky o rozrôznení kôry tejto ...
El País (España)
Mon, 17 Aug 2009 06:54:09 -0700
Las altas planicies de Phoebe y Alpha Regio muestran evidencias de rocas muy antiguas de colores claros. En la Tierra estas estructuras indican la presencia de granito, roca formada por la subducción del basalto volcánico en presencia de agua.
Fri, 16 Aug 2013 01:22:01 -0700
VENUS Volcans-crêpes dans le secteur de alpha regio. On voit ici 7 figures en forme de « galette » avec 25 km de diamètre et 750 m de haut en moyenne. Les bordures lumineuses et blanchâtres indiquent la présence d'éboulis sur les pentes de ces édifices ...
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