You have a projectile which just moves ballistically.

你有一个弹道射弹。

It would be a massive explosion, with chunks of molten material flying around the Earth ballistically, re-entering the Earth's atmosphere and causing massive meteor showers everywhere.

将产生巨大温而融化陨石碎片从地面飞起冲进大气层造成巨大陨石碎片雨。