From: Nick Balaskas <nikolaos.nul> Date: Wed, 17 Oct 2012 00:22:11 -0400 Archived: Wed, 17 Oct 2012 11:17:40 -0400 Subject: Alpha Centauri B Has An Earth-Mass Planet! Good News Everyone! This announcement of an Earth-size planet orbiting a Sun-like star so very close to us is just the news the world needs to inspire and motivate mankind in its next goal for space exploration - to build a "starship" and boldly set out with a crew to establish the first human settlement on this New Earth. According to Ben Rich who headed the Skunk Works (which built the Pentagon's secret aircraft such as the Steath Fighter and other advance aerospace vehicles), "We also know how to travel to the stars." and "If you've seen it in Star Trek or Star Wars, we've been there and done that." If this is true, we do not need a 100 year feasibilty study or wait until after we discover some new propulsion technology since this generation is ready to travel to the stars now! The generally accepted view that a Earth-size rocky planet must not be too close or too far from its "sun" so that water could exist on its surface in liquid form and thus be an ideal world for Earth-like life (the so-called "Habitable Zone") is not really a valid one. For example, our Moon (a rocky world a little smaller than the Earth is also within the same region of the Habitable Zone as our world but has no liquid water on its surface. Also, just because the newly discovered Earth-like planet is much closer to Alpha Centauri B than Mercury is to our Sun is not necessarily "much too hot for life as we know it". If only one side of this planet always faces Alpha Centauri B (just like only one side of the Moon always faces the Earth), then it is possible that this planet may have a range of temperatures from extremely hot on the side facing its sun and extremely cold on the side facing away from its sun. ----- http://littleurl.info/9zd Alpha Centauri B Has An Earth-Mass Planet By Keith Cowing Posted October 16, 2012 6:00 PM European astronomers have discovered a planet with about the mass of the Earth orbiting a star in the Alpha Centauri system - - the nearest to Earth. It is also the lightest exoplanet ever discovered around a star like the Sun. The planet was detected using the HARPS instrument on the 3.6-meter telescope at ESO's La Silla Observatory in Chile. The results will appear online in the journal Nature on 17 October 2012. Alpha Centauri is one of the brightest stars in the southern skies and is the nearest stellar system to our solar system -- only 4.3 light-years away. It is actually a triple star -- a system consisting of two stars similar to the Sun orbiting close to each other, designated Alpha Centauri A and B, and a more distant and faint red component known as Proxima Centauri . Since the nineteenth century astronomers have speculated about planets orbiting these bodies, the closest possible abodes for life beyond the solar system, but searches of increasing precision had revealed nothing. Until now. "Our observations extended over more than four years using the HARPS instrument and have revealed a tiny, but real, signal from a planet orbiting Alpha Centauri B every 3.2 days," says Xavier Dumusque (Geneva Observatory, Switzerland, and Centro de Astrofisica da Universidade do Porto, Portugal), lead author of the paper. "It's an extraordinary discovery and it has pushed our technique to the limit!" The European team detected the planet by picking up the tiny wobbles in the motion of the star Alpha Centauri B created by the gravitational pull of the orbiting planet . The effect is minute -- it causes the star to move back and forth by no more than 51 centimeters per second (1.8 km/hour), about the speed of a baby crawling. This is the highest precision ever achieved using this method. Alpha Centauri B is very similar to the Sun but slightly smaller and less bright. The newly discovered planet, with a mass of a little more than that of the Earth , is orbiting about six million kilometers away from the star, much closer than Mercury is to the Sun in the solar system. The orbit of the other bright component of the double star, Alpha Centauri A, keeps it hundreds of times further away, but it would still be a very brilliant object in the planet's skies. The first exoplanet around a Sun-like star was found by the same team back in 1995 and since then there have been more than 800 confirmed discoveries, but most are much bigger than the Earth, and many are as big as Jupiter . The challenge astronomers now face is to detect and characterize a planet of mass comparable to the Earth that is orbiting in the habitable zone  around another star. The first step has now been taken . "This is the first planet with a mass similar to Earth ever found around a star like the Sun. Its orbit is very close to its star and it must be much too hot for life as we know it," adds Stephane Udry (Geneva Observatory), a co-author of the paper and member of the team, "but it may well be just one planet in a system of several. Our other HARPS results, and new findings from Kepler, both show clearly that the majority of low-mass planets are found in such systems." "This result represents a major step towards the detection of a twin Earth in the immediate vicinity of the Sun. We live in exciting times!" concludes Xavier Dumusque. ESO will hold an online press conference offering journalists the opportunity to discuss the result and its impact with the scientists: http://www.eso.org/public/announcements/ann12072/ Nick Balaskas Listen to 'Strange Days... Indeed' - The PodCast At: http://www.virtuallystrange.net/ufo/sdi/program/ These contents above are copyright of the author and UFO UpDates - Toronto. They may not be reproduced without the express permission of both parties and are intended for educational use only.
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