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"The fact that we've found so many planet candidates in such a tiny fraction of the sky suggests there are countless planets orbiting sun-like stars in our galaxy,"
Originally posted by aethron
To my mind, if life is an accident, then it must be an extremely rare accident, because a vast number of circumstances are necessary for the origin and evolution of life to the point of an intelligent species, and all these circumstances would be ‘just right’ in an infinitesimally small number of instances.
G dwarf star
Kepler magnitude = 13.7
Visual magnitude = 14.2
Alternative designations used in catalogues: KIC 6541920 and KOI-157.
Distance from Earth: about 2,000 light-years
Spectroscopic analysis of a high-resolution spectrum taken at the Keck I telescope leads to:
Effective temperature Teff = 5,680 ±100 K
Surface gravity log[gsurf (g cm s-2)] = 4.3 ±0.2
Metallicity [Fe/H] = 0.0 ±0.1 dex,
Projected stellar equatorial rotation of vsini = 0.4 ±0.5 km s-1.
Mass = 0.95 ±0.10Msun
Radius = 1.1 ±0.1Rsun
DrakusComment: So it's mass and radius is comparable to our Sun, which means those planets are nicely baked, probably...
Originally posted by General.Lee
reply to post by bjsmi2
. It's always something microscopic that has no bearing on anything of importance. And to think they spend millions of dollars of taxpayer money to tell us this "news".
Originally posted by roughycannon
PS. you might want to change the thread title to "NASA has found earth sized planets in the habitable zone" or something like that...
So the instrument detects a tiny regular variability in the luminosity of a star, and from this the scientists deduce the mass, density, orbital characteristics of a solid planet whose passage across the disk of the star is the definite cause of the regular variability?
Many stars have been known since ancient times to have variable luminosity, and in some cases the variance is so great that it cannot be ascribed to a planet obscuring the disk of a sun, indicating that there is some process other than the passage of a planet across the disk of a star governing the variability of stellar luminosity.
Originally posted by Starwatcher
....To think a thousand years ago we thought the earth was flat.