00:03Black holes are notoriously hard to photograph.
00:06According to the ESO, our first-ever image of a black hole came from eight different telescopes across the world
00:11that joined forces to get one simple picture.
00:13But according to ScienceAlert, more images can answer some big questions.
00:17Scientists are particularly interested in rings of light just outside a black hole's event horizon.
00:22These rings are made of photons stuck in the orbit of a black hole that aren't quite close enough to
00:27get sucked in.
00:28Research published in the journal Science Advances says that this visible ring of light actually contains infinite light rings nested
00:34inside it.
00:35This is possible because black holes are so massive that gravity works in wild ways around them.
00:40Theoretically, it would make orbiting photons capture a snapshot of the entire universe.
00:45The closer you look, the older these snapshots get.
00:47Each sub-ring of light shows the universe at an earlier date, meaning that if you saw them in order,
00:52it would tell the life story of the universe.
00:54And more practically, the sub-rings show the mass and speed of a black hole.
00:58Our best bet for seeing these light rings is with arrays of telescopes called interferometers.
01:02The goal is to have long distances between telescopes, so it would help to build one on the moon or
01:07beyond.
01:08The goal is to have long distances.
01:10The goal is to have long distances.
01:11The goal is to have long distances.
01:11The goal is to have long distances.
