Don't be easily convinced by the "artist's impression"...the photo that you see accompanying articles about Kepler 22-B. As the name implies, it's just an "impression"...
...wala pa'y actual picture sa Kepler 22B, it's very far away. Did you know that we don't even have a decent photograph of the dwarf planet Pluto? Sa 2016 pa ta makakita ug surface photos of Pluto, once the New Horizon spacecraft reaches its vicinity. Unya, just think, wala gani'y klaro nga photos of Pluto nga it's much closer to us than Kepler 22B, and now you're excited sa itsura sa Kepler 22B nga most of that is guesswork and speculation?
My hunch is the artist was instructed by media (perhaps even NASA? lol) to make it blue green colored so that mas "sellable" ang news item sa mga news networks etc. Politics and economics at work na sad (kay if wala'y interest ang public sa kani nga news item, the lesser chances for additional funding ang mga scientists/astronomers...now just think, if dili lagi unta ing ani ang systema sa kalibutan (i.e. dependent ang scientific research sa funding) then mas daghan unta tang mga na discover ron...unsaon man kay bati kaayo atong setup for science in the world today.
As to Kepler 22B, to sober up your excitement, the surface color MAY NOT actually be blue or green or bluegreen...it can range from looking like Venus (cloud covered) or looking like Mars (desert planet) or it may even look like Neptune (just blue gas)...so again, ayaw mo AUTOMATICALLY pa dala sa inyong excitement when you see the picture--it's an artist's IMPRESSION and NOT a photograph.
-RODION