What is a black hole? A black hole is an astronomical object with a gravitational pull so strong that nothing,…
Vienna, Austria, is pictured during a night pass from the International Space Station.
The Earth’s limb, or horizon, is pictured from the International Space Station.
A pair of docked Russian spaceships are pictured from the International Space Station.
The sun’s glint beams off the Atlantic Ocean creating a bright golden sheen.
A bright blue, South Atlantic Ocean is pictured from the International Space Station.
