Where Exactly Does The Light Between Galactic Clusters Comes From?

There’s one thing they’re sure of: It’s been around a long, long time.

Transcript

00:00Not all stars are bound so neatly like our Sun.

00:06Some are soaring through the universe, more transient than even asteroids or comets,

00:10which are still bound to the systems in which they orbit.

00:13So where do these wandering stars come from?

00:15Well, scientists have had many theories,

00:17one of which involves massive galactic gravitational interactions,

00:20which force stars out of their galaxies and into the cosmos.

00:23But after tracking the light from these homeless stars back 10 billion years,

00:26they found they've been on their own for at least that long.

00:29Meaning it must be something else.

00:30James G., one of the astronomers from the University of South Korea,

00:33who is working on figuring out where they come from,

00:35had this to say about it.

00:36We don't exactly know what made the stars homeless.

00:39Current theories could not explain our results,

00:41but somehow they were produced in large quantities in the early universe.

00:44Adding that in the early days of the universe,

00:46smaller galaxies that formed likely didn't have strong enough gravitational pull,

00:50leading to more stars being lost to intracluster space,

00:53resulting in more light between galactic clusters still today.

00:59Totally.

01:00Thank you,

01:01and that's it for now.

01:02Anyway,

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