Microlensing Uncovers Earth-Like Planet

smooth wombat writes "Using a new technique called gravitational microlensing, a team of astronomers have discovered the smallest Earth-like planet circling a star 20,000 light years away in the constellation Sagittarius. Unfortunately the planet takes ten years to circle the red dwarf and has a surface temperature estimated at -220 C which means it's just a larger version of Pluto so the chance of finding life on this planet is essentially zero."

Comments

Re:Earthlike?

[scheming daemons]

By "earth-like" they meant that it is terrestrial, not a gas giant (a la Jupiter or Saturn).

Until now.. they hadn't found a planet in another star system that was

A) terrestrial (solid, with a rocky surface) B) farther than 0.15 AU from its star.

This planet is 2.5 AU from it's star and it is not a gas giant. That's what makes it "earth-like".. in the way that mercury, venus, mars, and pluto are "earth-like".

Until now.. no such planet had been observed in another star system.

All of this is in TFA.

Re:Basic thermodynamics

[Jim_Callahan]

Uh, melting point varies with pressure and a couple other factors that depend on your PVT model. You can melt pretty much any material if you set the conditions correctly, regardless of wether the decomposition temperature is below the MP at 1 atm or not. The liquid phase may not be very accessible, but it's always there.
 
Also, you need a better example, since Sucrose (the molecule people mean when they say 'sugar' without a qualifier) has a MP of 191 degrees centigrade at 1 atm, i.e. it has a viable liquid phase pre-decomposition. Perhaps you're thinking of Glucose or Ribose?
 
You could make an argument that 'frozen liquid' would refer to an amorphous (non-crystalline/glassy) structured solid only, as these result from a skipping of the phase formation bit of solidification to just lock the structure of the liquid into solid form. However, I think it's more likely that the writers of the article just skipped the materials phase of their education, locking the structure of their brains into a void-filled physics-oriented glass. Or they just, you know, made the intellectual equivalent of a typo. Whichever.