2. Proof A Planet Has Been Tested
This should be a pretty easy one for scientists. Has this planet been tested? We mean, has it gone through millions of years of change where life is still capable of existing on it? Has it faced any problems and managed to last?
It is clear that one of the things a planet needs for us to even consider them as a new home is proof of its merit. If we’re looking at a newer planet, it may be considered good to go to for our long-term future. Yet it won’t be good for several generations untested.