There’s an enormous quantity of selection amongst exoplanets – planets exterior our photo voltaic system. There are water worlds, lava planets, egg-shaped worlds, planets with a number of suns, and even planets with no solar in any respect! What can we be taught from all this bizarre, wondrous selection? What does it inform us about each the exoplanets themselves and our own residence planet?
Video transcript:
[Narrator] Earth is superior.
What could be much more superior, if we discovered one other earth, or a bunch of earths.
That’s one of many issues we’re on the lookout for at NASA as we study exoplanets, planets outside our solar system.
But maybe searching for a planet similar to our own, where conditions might have led to an entirely unique origin of life, finally telling us that we’re not alone in the universe, maybe that’s not your thing.
That’s cool.
Maybe you’re more interested in just how weird exoplanets can be.
We think there are entire worlds covered by deep oceans, water worlds.
Not weird enough for you?
Okay. How about planets covered entirely in oceans of lava?
There are egg-shaped planets, worlds that orbit so close to their stars that they’re pulled by gravity into a lopsided shape.
And there are planets where conditions might be just right for it to rain things like glass, or even rubies and sapphires.
There are planets that orbit pairs and even groups of stars. Imagine having three or four suns in the sky!
On the opposite end of the spectrum, there are the loners, rogue planets wandering out in space with no star to call their own.
There are even planets that orbit dead stars, stars that exploded long ago and left behind a rapidly spinning core called a pulsar. Some of these pulsar planets could be among the oldest in our galaxy, pushing 13 billion years.
Such planets would have witnessed most of the history of the universe. Sadly, nearly all of it without tacos.
Now, we think that we haven’t found one yet, that there probably are exoplanets pretty similar to earth out there.
But in the meantime, there are absolutely tons of weird, wondrous worlds in our galaxy.
(jaunty music)
