A quasar is a giant black hole surrounded by a disc of superheated matter that outshines its entire galaxy. The record holder, announced in 2024, is about 500 trillion times brighter than the Sun. Its central black hole, some 17 billion solar masses, swallows roughly one Sun's worth of matter every day.
A large share of Earth's water molecules formed in the interstellar cloud that existed before the Sun was even born, more than 4.6 billion years ago. You are literally drinking a cosmic fossil.
By day, the Martian sky looks butterscotch because of fine dust hanging in the air. But at dusk, those same grains scatter blue light forward, creating a bluish glow around the Sun. Rovers have photographed these blue sunsets: the exact reverse of what we see on Earth.