Just… no.
You don’t watch GREENLAND in theaters: you get it six months later and have a viewing party so that you can throw popcorn at the screen. Comets don’t work that way, comet fragments don’t work that way, social media doesn’t work that way, FEMA doesn’t work that way, cometary strikes don’t work that way, deep impacts don’t work that way, the military doesn’t work that way, planetary atmospheres REALLY don’t work that way, Greenland doesn’t work that way, and any international conspiracy capable of creating the Quest Object featured in the film absolutely, completely, and unquestionably doesn’t work that way.
Other than that? I guess it’s fine. Things blow up.
Forget it Moe. It’s Greenland.