After '7 minutes of terror,' NASA's Perseverance rover will begin an 'epic journey' on Mars next month
Astronaut artifacts on moon -- like Apollo landers and Neil Armstrong's bootprint -- now protected by US law
Hubble observes strange, distant exoplanet similar to 'Planet Nine' that may exist in our solar system
Earth is 2,000 light years closer to supermassive black hole at the center of our galaxy than we thought