2. Space dominated the news this week.

Astronomers captured the first-ever images of a black hole, peering inside one of the deepest, darkest abysses in the cosmos. Here’s how they did it.

Back on Earth, NASA studied the twin astronauts Mark and Scott Kelly while one was on Earth and one was in space. The results show just how much space can change you. But in the year Scott Kelly spent orbiting Earth, he didn’t just gather data for the study: He produced some, well, stellar images.

Separately, Falcon Heavy, the most powerful rocket in operation, successfully launched into orbit. It represents the latest advancement for SpaceX.