The Largest Galaxies in the Universe

本站添加: 2026-06-07

[00:00:00]What is the largest galaxy [music] in the universe?

[00:00:03]Most people think the Milky Way is enormous, and it is. Our galaxy stretches [music] more than 100,000 light years across.

[00:00:11]But compared to some galaxies, [music] it's surprisingly small.

[00:00:16]And here's where things become strange.

[00:00:18]Galaxies [music] don't have clear borders. Unlike planets, they slowly fade into the darkness, making it difficult to determine [music] where a galaxy actually ends.

[00:00:30]That's why measuring the size of a galaxy is much harder than most people realize.

[00:00:35]But scientists have found galaxies that completely dwarf our own.

[00:00:40]One of them is called Malin 1.

[00:00:43]At first, [music] it looked like a normal spiral galaxy. Then astronomers discovered something incredible. Its outer spiral arms extend [music] nearly 650,000 light years across. That's about six [music] times wider than the Milky Way.

[00:00:59]Another giant is Rubin's Galaxy, also known [music] as UGC 2885.

[00:01:06]This monster galaxy spans [music] almost 450,000 light years and contains far more stars than our own galaxy. Sometimes galaxies appear enormous because of collisions.

[00:01:18]Gravity pulls stars into gigantic streams that can stretch hundreds of thousands of light years.

[00:01:25]But the true giants [music] may actually be elliptical galaxies.

[00:01:30]These galaxies grow [music] by absorbing other galaxies over and over again.

[00:01:35]One example, [music] called ESO 383-76, may stretch nearly 1.8 million [music] light years across.

[00:01:44]Think about that. You could line up 18 Milky Ways across [music] its width. And here's the craziest part. Scientists don't know if this is the limit. There may be even larger galaxies hidden in the darkness.

[00:01:57]New observatories are expected to reveal objects we've never seen before.

[00:02:02]Possibly galaxies so large and faint that they've remained invisible until [music] now.

[00:02:07]And the real question is how many giant galaxies are still [music] hiding in the universe waiting to be discovered?