3 Ways Exoplanets Rocked Planetary Science

Exoplanets have taught us a lot more about planets than our solar system could ever teach us, from what happens when they’re born, to what happens when their stars die.

Hosted by: Hank Green

----------
----------
Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever:

Silas Emrys, Jb Taishoff, Bd_Tmprd, Harrison Mills, Jeffrey Mckishen, James Knight, Christoph Schwanke, Jacob, Matt Curls, Sam Buck, Christopher R Boucher, Eric Jensen, Lehel Kovacs, Adam Brainard, Greg, Ash, Sam Lutfi, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, charles george, Alex Hackman, Chris Peters, Kevin Bealer

----------
----------
Looking for SciShow elsewhere on the internet?
----------
Sources:

Images:

[robinhahnsopran]

It's Hank! Hank is everywhere! According to his twitter, he's now going back to school, too. I truly wonder if this dude EVER sleeps.

[Reallycoolguy]

SciShow, you guys are the best! Thanks for the interesting, varied, and wide ranging content!

[LaibaStarXX]

This just shows us how there could be more possibilities than we could imagine.

[Imperiused]

Pretty interesting. Especially that bit about the mass of the protoplanetary disk. Bit of a mystery, that.

[SunriseFireberry]

The ancient of days: 1992, acc. to SciShow. This means that Hank is beyond ancient.

[pezzleysnipes]

I love the fact that the scientific consensus for decades, or maybe even centuries and millenia, was that our solar system must be pretty typical. Only for us to realise in the last 20 years, that the Sol system is pretty friggin unusual, from the number of planets, to the orientation and composition.

[sirierieott]

This Christmas lockdown (UK) I’ve watched the digitally restored DVD version of the Cosmos series, re-released in 1990 on VHS. Even with the update in 1990 with a ten year older Carl Sagan doing a short update piece after each episode, this ‘new’ release, ten years after the original programme was aired on TV, there were still no exoplanets discovered. 30+ years later and we are getting close to 5000 planets confirmed outside out solar system - amazing… Now that is a ‘voyage' in a ship of the imagination, that’s scientifically proven...

[semaj_]

Great episode! Very interesting. Exoplanets are my favorite astronomical subject. There's so many intriguing possibilities with them

[NewMessage]

That title has me imagining a planet ruled by Rock n' Roll...

Netflix, get on it!

[ACE-kztf]

This is interesting keep us updated please

[circle]

Very interesting video. Exoplanets are so fascinating. 🪐

[kindnessthroughknowledge]

Getting amped up about stuff we don't know - #goscience!

[maidros]

Question. How does a star's gravitational pull change as it undergoes different stages of its life, and how does that pull in that planet Hank was talking about?

[tmvps]

"The universe is hostile, so impersonal, devour to survive.
So it is. So it's always been." M.J.K

[UpcycleElectronics]

I wonder how many planets actually begin in the star nursery. If there are stars forming and digging their gravity wells, obviously they started out as pre-fusion capable objects and don't coalesce at the same time/rate. Many should fall into the influence of other, more massive, gravity wells and could still conform to the over all flattening disk. It seems probable most would be established to some extent pre-star.

[danieljensen]

That feel when studying planets teaches you about planets.

[Qexilber]

Wait. Timecode 3:40.
DOES a Supernova obliterate the star's planets? I mean it is shown in Sci-Fi but we all know that the Sci-Fi-trope of a shockwave in space is wrong since only direct contact with material ejected from an explosion (or other accelerated debri) can cause destruction, not a shockwave like it would form in air. So, is the ejected material of a supernova dense enough when it reaches like 1 AU or greater distances, to blow planets to pieces, or the rediation strong enough to vaporize whole planets?

[rameshupadhyay]

Please make a video on how to get to mars

[bankerdave]

When a star swells into a Red Giant, is it possible for it to push its circling planets outward as to not swallow them?

[Kram]

Seven hundred Solar Systems with Similar Sized Stars - splendid.