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/Home/Sciences/Earth & Space/Astronomy/Celestial Bodies & Phenomenon/Other Worlds Alpha Centauri Votes:0 Alpha Centauri A Candidate for Terrestrial Planets And Intelligent Life Last Update 15th October '97 - new update currently in preparation Alpha Centauri is a special star - not only because it is the closest stellar system to the sun but also because it is one of the relatively few places in the Milky Way Galaxy that may offer terrestrial life conditions. If humanity looks for intelligent life elsewhere, then Alpha Centauri is an excellent candidate. Visible only from latitudes south of about 25° the star we call Alpha Centauri lies 4.35 light-years from the Sun. But it is actually a triple star system. The two brightest components Alpha Centauri A and B form a binary. They orbit each other in 80 years with a mean separation of 23 astronomical units (1 astronomical unit = 1 AU = distance Read More Go to Site Other Planetary Systems Votes:0 Other Planetary Systems? Are there planets orbiting other stars beyond our solar system? We do not know for sure, but with the recent discoveries about 51 Pegasi, 70 Virginis and 47 Ursae Majoris the weight of evidence is now so strong that only a "devil's advocate" denies the conclusions. Here is some of what we do know (this is somewhat incomplete; please see the references below for more info): Facts Three small bodies have been found in orbit around the pulsar PSR 1257+12 . They have been designated "PSR1257+12 A, ..B, and ..C". One is about the size of the Moon , the other two are about 2 to 3 times the mass of Earth . They were discovered by measuring variations in the pulsation speed of the pulsar which can be interpreted as gravitational effects of three small planets. The original Read More Go to Site Volcanoes on Venus Votes:0 Volcanoes on Venus Volcanoes on Venus Overview Venus has more volcanoes than any other planet in the solar system. Over 1600 major volcanoes or volcanic features are known (see map), and there are many, many more smaller volcanoes. (No one has yet counted them all, but the total number may be over 100,000 or even over 1,000,000). These volcanoes come in a variety of forms. Most are either Large Shields or Smaller Shield volcanoes, but there are also many Complex Features , several Unusual Constructs , and a few Large Flow Features . None is known to be active at present, but our data is very limited. Thus, while most of these volcanoes are probably long dead, a few may still be active. Locations after Head et al. (1992) J. Geophys. Res. 97, 13153. Base map is Magellan topography data, avai Read More Go to Site WSJT_Home_Page_Moved Votes:0 The WSJT Home Page has been moved to http://physics.princeton.edu/pulsar/K1JT/ Please correct your bookmark of this page. Read More Go to Site

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