Sunshine (2007):

50 years into the future, the Sun begins to die, and Earth is dying as a result. A team of astronauts are sent to revive the Sun - but the mission fails. Seven years later, a new team are sent to finish the mission as they are Earth's last hope

In the future, the sun is dying and Earth lives another glacial period. After the failure of the Icarus Mission, a team of eight astronauts are sent to the sun in the Icarus II Mission to explode a weapon generating a supernova within the sun in the last hope of planet Earth. However, when a crew-member commits a mistake in the operation of the aircraft shield, he jeopardizes the survival of the group.