View Full Version : New "Earth like" planet discovered a mere 42 light years away

8th November 2012, 21:57

Enjoy - justoneman

8th November 2012, 22:26
Here are 5 more some a little bit closer http://www.space.com/16728-top-5-habitable-alien-planets-countdown.html This stuff is so interesting, space is so cool!

8th November 2012, 22:30
Have you noticed they never tell us anything about planets around star systems closest to us? Alpha Centauri, Sirius, Procyon - all of which are within 12 light years of earth - and apparently they have no planets. (right) And yet they can tell us all sorts of things about planets 40 and 60 light years away. I did see a story once about a gas giant in Epsilon Eridani, which is 10.5 light years away, but that's it, as far as I know.

8th November 2012, 22:43
They have been gradualy disclosing this over the last few years, i have posted several articles on here....


Published on 18 Oct 2012 by SpaceRip

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.

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.

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 [2]. The effect is minute it causes the star to move back and forth by no more than 51 centimetres 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 [3], is orbiting about six million kilometres 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 characterise 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.