While observing the universe, @NASAHubble caught a galaxy cluster smiling for the camera. 😊
The smile lines are arcs caused by an effect known as gravitational lensing, where massive structures warp spacetime with their powerful gravitational forces and act as a cosmic lens.
Welcome home!
Crew-12 splashed down in the Pacific on Thursday, Oct. 8. Their 237-day mission aboard the @Space_Station included research into medicine, quantum science, and 3D-printing with metal in low Earth orbit. https://t.co/bHE4QrN1r5