The planets are named like that in order to catelogue them, using Gliese 436 b as an example, the first part is usually named after the telescope or survey that found it, in this case Gliese is from William Gliese a German astronomer, who created a catelogue of nearby stars. The number is the order in which the star was cateloged by position, so in this it's the 346th star. Finally the "b" is the part that refers to the actual planet, in the order it was found, ensuing planets are named c, d, e, and so on.

I absolutely love the science video reactions, they're my favorite compared to normal reacts video

We've gone from Maguire's slabhead to massive fooking planets.. Great transition

Josh needs to be in this mood more often, he's a funny man Indeed

Josh isn't wrong, there's a specific term for it "escape velocity" which if gained by an object, the object will overcome the gravitational pull and get out of the planet's atmosphere.

Finally a video about space, literally the best types of videos on this channel

Simon's fake confidence when he says earth's flat is just too funny to watch🤣

I've legit had dreams where I've jumped off planets and left the gravitational orbit and flew into dark space without any control.

"Flat earth. Cat stink. Let's carry on" - Simon Minter, 2022 Lmfao

simon made a good point that theres stuff weve not found out on earth yet we can find out stuff about other planets. definitely some stuff is discovered yet covered up to remain a mystery

Number 3 was literally just lanet 4546b from Subnautica, change my mind

Tobi is sooo spontaneous with his jokes its impressive

Escape velocity, the velocity or speed that is minimum requirement to escape the gravitational field of a planet, is around 11km/s for earth and for moon it is around 3 km/s So you will need to jump faster than escape velocity to ensure you escape the gravitational orbit

"super jupitor" "supitor" toby's jokes always go unnoticed

Y’all keep making the great content. I have been here since 2015 or 2016 and you guys helped me whenever I was down. Mr. Yoyo

That noise is the funniest thing Josh has done in the sidemen 😂 I challenge the sidemen to react to a Josh funny clips without laughing

simon and tobi sync reaction at 4:27

Whichever planet KSI lives on should be on this list

The Science related reactions are back! ♥️

I'm so glad we're back to reacting to better content. Yep, and we do love puns.

GJ 1214B would basically be real life Subnautica. Yep never going to that planet

0:03 😂😂😂 in the KnOwnnN UnIVereeeee

2:25 I love tobi

4:20 PUNK HAZZARD IS REAL

“Might not be there anymore…might of gone boom boom” 😂😂😭

Josh is acting like such a child in this video. A fun watch 😂

Sidemen should make a video where they talk about different theories about space/aliens etc. or podcast or something, it would be interesting to hear theirs opinion!

0:18 my warm up routine when I'm about to sing metal 🤣

4:49 I actually know the answer to this. It was named after some german scientist guy named wilhelm gliese who discovered/cataloged it. That's why so many stars and planets have the name Gliese alongside the number they were assigned by Gliese himself; case in point, Gliese-710

1:25 2b fair tho

4:27 beautiful tobi and simon moment

Always up for this kindda reacts

As a wise man once said.. “Thinking there isn’t other beings or aliens in the universe, is like dipping a spoon in the ocean & not finding a whale”

Bro, Josh is so underrated 🤣🤣🤣

YESSS finally a space video again, these are the best ones

Love these types of reactions

7:10 Bro, that's the planet that the Aurora crashed on!

The sidemen are constantly dropping banger videos that are funny or makes me happy continue to do so I will always love your videos and the science videos we love it continue making more science MUCH LOVE FROM ANTIGUA

Love these type of videos

Really like the educational style content reactions from them

@7:38 this planet has 3 stars. Could name them Vikstar1 2 and 3

Love seeing a rare Tatsu appearance in a sidemen video lol. Thats Josh's sweaty racing alias when he does the voice for non GTA people

Yeees love the space videos

That sound effect on josh 😂😂🤣🤣

Starfield releasing soon, so we will experience planets like these.

0:29 Saturn on steroids🪐💊

What if there was a planet that have life that is almost exactly as us and think there is someone out there that can attack at any moment

that was insane can't wait for more keep it up 😂😂

7:00 It's a common myth that the fastest sperm or the first to reach the egg is "you" but that's not the case, several sperm cells reaches the egg, but several cells fight to get inside the egg, it could have been the 43rd to reach the egg but first to get inside. Occasionally, two sperm are known to fertilize a single egg; this 'double fertilization' is thought to happen in about 1% of human conceptions. An embryo created this way doesn't usually survive, but a few cases are known to have made it - these children are chimaeras of cells with X and Y chromosomes (copy paste)

I'm glad we all agree that Science SidemenReacts are the best. Love watching them have existential crisis'

7:15 that's Kamino definitely

1:10 Simon, planets don't die in 300 years

7:27 ksi got his forehead genes there

Need more space vids especially with vik and jj

loved this episode!

Old-men trio is the best

i have been wating for my whole life for the sidemen to watch this exact video holy its my lucky day :))

1:00 I have that tv

Josh is a whole new vibe i love it

3:14 an decillion comes after nonillion.

I love when they react to space and syfy stuff.

First time I've ever been this early to any sidemen video Love the content homies keep it up!!

i like these type of videos, where its all about facts and they discus with each other more

more of these

"Out of all the planets that exist in the world." ~ Josh Zerkaa ~ 2022

More space vids these are amazing!!!!!!!

Love space and animal reacts hope they do more

Tatsu has more appearances in sidemen videos than in the GTA RP racing scene 🤣 lmao

Nah, but what message did they send to that 1 planet. Did they send a message in English expecting them to speak English or what?

laughing the whole way through ♥️

shouldny have laughed that hard at the noise josh made hahaha top tier content

Josh "strangeling a cat" really proves his age

Bring more space videos plzzzzz 🙂

This was such a funny video man

We need more space videos

8:10 cause we send technology to discover it and we got a massive telescope. we can't discover earth cause the planet is so tricky you need something advanced to support earth mass and gravity.

this channel has blown almost at the same subs as moresidemen

The method I know is used to find what the celestial bodies are made of is spectrum analysis where they do the analysis of received light from that body.

I love the fact that tobi is in the react vids about this topic. He sounds really interested

You guys need to try get in touch with NASA imagine hide and seek on the international space station that would be so sick

Guys you should do more videos of this type 😀 They are really fun!!

Tobi is so naturally funny it’s mad

Tobis new energy really good

This is one of the best, keep it up guys!

They outta do 10 scary SCPs.

Need a playlist of just sidemenreacts so that I don't have to worry about a random video to play when I wanna binge watch

love sidemen reacts randomly appears on my feed.

Tobi is slowly climbing up the ranks as the funniest sideman

Fun fact:Rainbows were called "bows of promise" in Victorian English

Ooooooo I love these sort of reactions

Best reacts in a while lads

shout out to the camera man who travelled from planet to planet to get all this footage.

Nonillion is a very real number, it comes after octillion and before decillion and the name is not just randomized. The names of numbers that massive become very repetitive because they recycle the same primary numerical prefixes like un, duo, tre, quad, quin, sex, sept, octo, non, dec, etc. So it goes million, billion, trillion, quadrillion, quintillion, sextillion, septillion, octillion, nonillion, decillion, undecillion, duodecillion, tredecillion, quattuordecillion, quindecillion, sexdecillion, septendecillion, octodecillion, novemdecillion, vigintillion, unvigintillion, and the cycle spirals down that same pattern. Also each one has 3 more zeros than the previous number. I only know this because I play too many exponential games.

Simon: "Let's carry on" *Video Ends* Me: *Confused*

yes lads more of these then

The main reason that missing plane wasn’t found is because there is human interference. There’s only a few people looking for the plane and only a few people authorised to look for it meanwhile anyone can technically research space

This was kinda mind blowing

Josh on Tatsu energy

This energy ⚡️ 👌🏼

Okay but here's the real question tho, what do you send as a message to another planet? I mean it can't be English or ordinary language right? How would you communicate with a planet with a possible civilization if you haven't the slightest clue their means of communication?