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Originally posted by TrustEvery1
Daniel Fischer @cosmos4u
So here goes: one-Earth-mass planet very close to Alpha Cen B, noisy radial velocity signal, amplitude 50 cm/s, P=3.2 d, some doubts remain
twitter.com...edit on 16-10-2012 by TrustEvery1 because: link
Doppler shifts also tell us the star's radial velocity (how fast the star moves toward and away from us). As you might expect, larger radial velocities mean bigger planets. Based on the star's mass and the period of the shift, we can also calculate the planet's orbital radius
www.eso.org...
“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 Stéphane 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.”
Originally posted by TrustEvery1
Alright, well......I guess there's one thing left to say
Shows over, everyone go home.
Originally posted by Idonthaveabeard
Doppler shifts also tell us the star's radial velocity (how fast the star moves toward and away from us). As you might expect, larger radial velocities mean bigger planets. Based on the star's mass and the period of the shift, we can also calculate the planet's orbital radius
So nothing to do with an actual radio signal
Originally posted by GezinhoKiko
from ESO
“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,”
is this for real?
ESO
Originally posted by DGenR8
Well, a very cool find, but not the super fantastic life changing news I was hoping for.
One day that news WILL come.
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.
but real, signal from a planet orbiting Alpha Centauri B