Engineers at Aerojet Rocketdyne assemble the ‘RS-25’ a.k.a. Shuttle Main Engine engine at NASA's Stennis Space Center. First fired in May of 1975, four such legacy-design motors will power the core of the Space Launch System.
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.
