Can a planet be Terraformed?

Abstract:

Since Mars is already trying to be terraformed, can other planets be terraformed as well despite their own characteristics? For the next couple of months we will be making discoveries and trying to terraform our hypothetical planet Zephyrus. We will be trying to see if there is a way to terraform my planet even though it is so cold. We will also try to develop a way to experiment and search for any groundwater on Zephyrus, since there is no evidence of rivers or surface water. All of the discoveries that are made can be ways to help improve and find a suitable way to terraform the planet. Hopefully, a discovery can be made to terraform planets and make them habitable for human beings to live on.