NASA’s Chandra X-ray space telescope has found a black hole that’s growing at an extremely rapid pace. The telescope is seeing the black hole, which has about one billion solar

Mercury’s large metallic core is 70% of its mass, which is way more than the other rocky planets. Scientists have wondered if a collision with a much larger body stripped

When astronauts head out into space they are protected from deadly radiation by their spacecraft and on space walks, their space suit. Back on Earth, we too are protected but