Deep Impact (1998)

A comet named Wolf-Biederman is discovered to be heading toward Earth, threatening to cause a global catastrophe. As the human race prepares for the worst, a joint mission by the US and Russia is launched to intercept the comet and prevent disaster. However, when the mission encounters numerous challenges and fails to divert the comet's path, the crew of the spacecraft Messiah devises a last-ditch plan to stop the main comet and give Earth a chance for survival, even if it means sacrificing their own lives.