He likes to say stupid things all the time I've noticed.
The wiki article also says the following,
"Depending on its actual mass, the planet could be rocky, liquid, or gaseous.[7] Since it is substantially larger than Earth, it is likely to have a different composition than Earth."
Although I guess some people just like to be stupid all the time.
If the planet was only 2 times the mass of the earth I don't think it could be a gas planet, because it wouldn't have enough mass and therefore gravity to hold itself together. Gas planets work when they're huge but a lot of the mass (and gravity) of the earth comes from the fact that it's solid. If the earth was made of gas then most of the atmosphere would drift off into space, which would further reduce the mass and gravity and cause even more mass to drift off.
If it's covered in water, then it probably has land on it as well, it'd be really weird if it had hydrogen (1) and oxygen (16) but no silicon (14) or carbon (12) for rocks and dirt. Not to mention the chances of something being liquid rather than solid or gas is simply rare in general, as liquid is usually a fairly narrow range of temperatures and pressures compared to gas and solid. Even if it doesn't have land a water planet wouldn't be too bad, hydroponic farms and plenty of drinking water, not to mention ideal growing conditions for aquatic plants.
It's rather more than 2 times the mass, though? <!--QuoteBegin-"Wikipedia article"+--><div class='quotetop'>QUOTE ("Wikipedia article")</div><div class='quotemain'><!--QuoteEBegin-->Kepler-22b's radius is roughly 2.4 times the radius of Earth, or about half that of Neptune. Its mass and surface composition remain unknown,[7][6] with only some very rough estimates established: It has less than 124 Earth masses at the 3 sigma confidence limit, and less than 36 Earth masses at 1 sigma confidence.[8]
It has been estimated that it is probably a "Neptunian" (i.e. mass similar to Neptune[9]) planet with a mass of ~35 Earth masses, but in the "best case" it could be an ocean world with only some 10 Earth masses.[10]<!--QuoteEnd--></div><!--QuoteEEnd-->
Comments
The wiki article also says the following,
"Depending on its actual mass, the planet could be rocky, liquid, or gaseous.[7] Since it is substantially larger than Earth, it is likely to have a different composition than Earth."
Although I guess some people just like to be stupid all the time.
If it's covered in water, then it probably has land on it as well, it'd be really weird if it had hydrogen (1) and oxygen (16) but no silicon (14) or carbon (12) for rocks and dirt. Not to mention the chances of something being liquid rather than solid or gas is simply rare in general, as liquid is usually a fairly narrow range of temperatures and pressures compared to gas and solid. Even if it doesn't have land a water planet wouldn't be too bad, hydroponic farms and plenty of drinking water, not to mention ideal growing conditions for aquatic plants.
<!--QuoteBegin-"Wikipedia article"+--><div class='quotetop'>QUOTE ("Wikipedia article")</div><div class='quotemain'><!--QuoteEBegin-->Kepler-22b's radius is roughly 2.4 times the radius of Earth, or about half that of Neptune. Its mass and surface composition remain unknown,[7][6] with only some very rough estimates established: It has less than 124 Earth masses at the 3 sigma confidence limit, and less than 36 Earth masses at 1 sigma confidence.[8]
It has been estimated that it is probably a "Neptunian" (i.e. mass similar to Neptune[9]) planet with a mass of ~35 Earth masses, but in the "best case" it could be an ocean world with only some 10 Earth masses.[10]<!--QuoteEnd--></div><!--QuoteEEnd-->