The Planet That Wasn't

A boy struggles to find his place among the small amount of people left, after the explosion.
The explosion of the planet, that is.
Earth day? Who cared? Nobody on Earth, that's for sure. They proved that by destroying the planet enough that it collapsed in on itself.

When a class of fourteen year old students boards a space ship for a field trip, they don't realize that this is they're last time setting foot on earth. Kalem is one of the few left who cared about the planet at all, and going on a field trip to learn how they despoiled the planet further to make this craft ISN'T exactly his idea of a good time. It doesn't help that Kalem's parents were lost in the explosion, and with all the adults constantly reminding Kalem of what it was like on the surface, Kale isn't sure how much longer he'll last.

Every hint of Earth or 'the surface' cast dark cold shadows over Kale's naturally pessimistic life, reminding him of his parents, his home, everything he's lost. There's nothing for him here. Or is there? They run across a potentially habitable planet one cycle, but is there anything else down there?
Aliens? Hostile creatures? Desert, or tundra?
Hope?

Given the planet's purple distinction from space, it's definitely different from Earth.
But is it too different?
And will they be able to survive when they get there?