Alien Planet: Space Wars

Our solar system is under siege, the Aliens are headed straight for Earth, and hundreds of asteroids are traveling with them. The last hope is NASA's old spaceship, don't ask why, no one knows what happened to the space program. Some believe the rich saw the writing on the wall and evacuated Earth and our solar system using the best technological resources they could develop. Now the aliens are here, and it's too late for the human refugees, or is it...