- Astronomy Picture of the Day: Venus
Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
http://antwrp.gsfc.nasa.gov/apod/venus.html
(Added: Mon Oct 28 2002)
- Magellan Spacecraft
NASA's Magellan spacecraft made a dramatic conclusion to its highly successful mission at Venus when it is commanded to plunge into the planet's dense atmosphere Tuesday, October 11, 1994. During its four years in orbit around Earth's sister planet, the spacecraft has radar-mapped 98 percent of the surface and collected high-resolution gravity data of Venus.
http://www.jpl.nasa.gov/magellan/
(Added: Sat Oct 26 2002)
- Mariner 2 Spacecraft
Mariner 2 was the first spacecraft to fly by another planet. The spacecraft passed within 34,762 kilometers (about 21,600 miles) of Venus, discovering the planet's slow retrograde rotation (turning the opposite direction of its orbit around our Sun).
http://solarsystem.nasa.gov/missions/venus_missns/venus-m2.html
(Added: Sat Oct 26 2002)
- Pioneer Venus Project Information
The Pioneer mission consisted of two components, launched separately: an Orbiter and a Multiprobe.
http://nssdc.gsfc.nasa.gov/planetary/pioneer_venus.html
(Added: Mon Oct 28 2002)
- Runaway Greenhouse Effect
Certain gases like carbon dioxide and water vapor (and many others) have the property that they are essentially transparent to visible light but absorb IR radiation very strongly. Such compounds are sometimes termed greenhouse gases because, if they are present in a planetary atmosphere, they absorb the scattered IR radiation and tend to raise the temperature of the atmosphere by trapping solar energy.
http://csep10.phys.utk.edu/astr161/lect/venus/greenhouse.html
(Added: Sat Oct 26 2002)
- The Atmosphere of Venus
Missions to the surface of Venus (Russian Venera spacecraft) indicate that the cloud deck begins about 50 km above the surface. Spectral analysis of the thick cloud layer surrounding Venus suggests that the clouds are largely composed of sulphuric acid droplets.
http://csep10.phys.utk.edu/astr161/lect/venus/clouds.html
(Added: Sat Oct 26 2002)
- The Planet Venus
Until the 1960s, Venus was often considered a "twin sister" to the Earth because Venus is the nearest planet to us, and because superficially the two planets seem to share many characteristics.
http://csep10.phys.utk.edu/astr161/lect/venus/venus.html
(Added: Mon Oct 28 2002)
- The Surface Features of Venus
The surface of Venus is rather smooth in many places, though not nearly as smooth as originally expected . However, we find evidence for many of the same geological features found on Earth: canyons, volcanoes, lava flows, rift valleys, mountains, craters, and plains.
http://csep10.phys.utk.edu/astr161/lect/venus/surface.html
(Added: Mon Oct 28 2002)
- Venus - The Nine Planets
The Nine Planets is an overview of the history, mythology, and current scientific knowledge of each of the planets and moons in our solar system. Each page has text and images, some have sounds and movies, most provide references to additional related information.
http://seds.lpl.arizona.edu/nineplanets/nineplanets/venus.html
(Added: Sun Oct 06 2002)
- Venus Fact Sheet
Contains the mass, volume, escape velocity, orbital elements, spin rate, and many other parameters.
http://nssdc.gsfc.nasa.gov/planetary/factsheet/venusfact.html
(Added: Sun Oct 06 2002)
- Venusian Impact Craters
Impact craters are found to be distributed randomly but uniformly over the surface of Venus. Cratering of the terrestrial planets shows a record of two distinct periods, one from the late period of heavy bombardment and the other from a bombardment of asteroids and comets which occurred more recently.
http://www.solarviews.com/eng/vencrate.htm
(Added: Sat Oct 26 2002)
- Volcanic Features of Venus
Magellan SAR images show that volcanic features are abundant and widely distributed on Venus. Notable features include widespread, mostly lowland lava plains, extensive flows, lava channels, small shields, cones, domes, intermediate to large shields, and caldera-like structures not associated with shield volcanoes.
http://pds.jpl.nasa.gov/mgddf/chap9/chap9.htm
(Added: Mon Oct 28 2002)
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