It’s highly unlikely to be a gas planet at that size and distance from such a star. Something called hydrodynamic escape means that a gas planet needs to be quite a distance from its star, or very large, or both.Thank you very much for that. I didn't know that. Are you a science writer?It could be a water planet - similar to Uranus or Neptune, which used to be called gas giants along with Jupiter and Saturn but are now more commonly called ice giants because their structure is quite different from the two largest planets in the solar system - but with liquid rather than ices because of its temperature. It would still have a rocky core (as Uranus and Neptune are both believed to) but it’s “ocean” would cover the entire surface. Or it could be a rocky planet like Mercury, Venus, Earth, and Mars. These are the two most likely possibilities from what I’ve been able to find out.
No, I’m a high school teacher. :)
There are a few conservatives among us. My specialty is history, but I teach in a very good school where they expect all of us to be experts in our subjects and that means I get to talk about these things with people who have reasonable expertise (a lot of us have Masters degrees in our subject area and I have lunch with a couple of science teachers a couple of times a week and this issue came up at lunch the other day.)