New research into the biological effects of living in zero gravity has found yet another reason to appreciate the downward pull of our planet’s gravity. Scientists have known for a long time that space travel affects things like bone density and vision, but some of the more ambitious missions NASA has planned will test our understanding of health in space.
The supermassive black hole is 40 million times as massive as the sun and powers a quasar that existed 700 million years after the Big Bang.
The asteroid zoomed by Earth at a perfectly safe distance of around 1.8 million miles (2.9 kilometers).
Images show surprise changes to the spacecraft as it interacted with the atmosphere.
