WHAT IS A BROWN DWARF - A PLANET OR A STAR?

It may be hard to imagine, but our Sun, which is relatively small for a star, is heavier than any of 95% of stars in the Universe. There are also red dwarves 11 times lighter than our host star. However, they are actually not the lightest objects out there. In the wide range between gas giants and the smallest stars in the universe there are some fascinating objects known as brown dwarves, or dwarf stars.

#Space #Star #Kosmo

[Kosmo_off]

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[Xeno_Bardock]

A brown dwarf star is basically a gas giant planet but with its plasmasphere glowing brightly, mostly in infrared spectrum. Moons orbiting inside this plasmasphere would be hidden from telescopes. Life on its earth-like moons would have large eyes adapted to seeing in infrared spectrum. Also plants would be large and thriving on infrared photosynthesis.

[Fairy_Ukraine_Tarot]

Your English is getting better and better. 👍🏻

[maurizioibba]

Great video. Thank you 🙏.  I like everything in it; topic, graphics, narration, voice, sources ... keep making it, is a great way to learn.

[chamelionvibe]

Kudos to the cameraman that travelled mind boggling distances to bring such awesome videos of the stars in action

[donm-tvcm]

A habitable planet around a hot brown dwarf would be very different from Earth. Such a world would definitely be tidally locked. The side facing the brown dwarf would be bathed in dim red light and infrared radiation. Any complex life would develop "eyes" optimized for infrared, or perhaps use some sort of "sonar" vision. Either way, and probably even for a visiting human, it would be a world without colors.

If intelligent life could develop in such a place, they would ultimately figure out that their "sun" is a cooling brown dwarf and that they're doomed someday to just freeze out (I guess that beats being scorched to a cinder by an expanding red giant like our Sun someday!) on a much shorter timetable than they'd have from a star. Perhaps they would wonder if life is possible around bright objects like stars? I do find it astonishing to learn that some brown dwarfs can take 10 billion years to cool!

[Dragrath]

Technically young low mass red dwarfs can support molecules in their upper atmospheres and in some cases they can even form clouds of exotic compounds like Titanium oxide i.e. basically rock clouds. Part of this distinction is that the line between brown dwarf and red dwarf is actually quite blurry as with additional/faster heat inputs (either collapsing abnormally quickly it is possible for less massive objects to be able to reach the temperatures needed for nuclear fusion become they can settle down into an "electron degenerate" state. Note that what we call electron degenerate matter is matter where electrons can't fall into lower energy states because those are all occupied. This can occur both due to high pressure or low temperature. The prior instance is what supports white dwarf stellar remnants, brown dwarfs and gas giants.

The typical term we associate with degenerate matter are the same properties we associated with metals whether it be due to atoms cooling below the temperature where their outer valence shells energetically "want" to drop into lower energy states (Such as Lithium Beryllium Iron, Copper, or Gold on Earth) or high pressures driving hydrogen into metallic hydrogen deep within Jupiter, or carbon and oxygen within a white dwarf similarly into a metallic phase.

Basically the question of whether an object can trigger fusion is only indirectly related to mass. A solar mass object if it was too efficient at losing heat would also fail to become a star it is just that hydrogen tends to insulate heat fairly well that this isn't an issue There are a small number of "main sequence" L type stars like 2MASS J0523−1403 those cool enough to earn the spectral type L but which still display characteristics suggesting they have achieved the threshold for hydrogen(Protonium) burning, despite their low mass.

Nature throws curveballs at us every time we try and finely define categories like this

[garygray]

Very intuitive and great graphics! Luv this stuff! :-))

[esker]

Top quality videos. I’ve seen a good number of yours and tons of others but yours are up there with the best!!

[InnoFTW]

It's a huge disappointment to their mom

[razzikhan]

Such a great channel, waiting for the videos and just uploading after 7 minute's I am watching it. 👍👍

[Geckobane]

Always appreciate your videos. Thank you for making them.

[swarajgaikwadd]

This is amazing...keep up this amazing work 😁♥️

[victorandrade]

Just tô point out your videos are just awesome. Congrats on making such great and complete content!

[mdtalhaansari]

7:25 "Brown are rather cool objects for stellar standards."

I saw what you did there.

[marcelosoutocamiou]

Excelentes videos siempre. Muy bien explicado. Gracias.

[susanariveracabrera]

I like very much your videos. Thanks for giving us this kind of information. I think brown dwarfs and dwarf planets can give us a clue on how the Solar System and some other planetary systems were originated. Though Solar System had been explored with probes and detectors at the high atmosphere, there is still so much we need to investigate. Nevertheless, I think with the data that all these devices have sent us we should probably reconsider our theories on the formation and evolution of the Solar System, and to try to understand that it's behaviour is not purely gravitational, but highly magnetic and electric. Please continue doing these high quality videos. Have a nice research!

[martinleithe]

Love this videos. I just watch them and enjoy whatever you bring for content. Calming voice to listen to.
Space is interesting. Keep the content coming! Thank you kosmo :)

[masamune]

Wonderful video! Thank you! Love the channel ❤️👍

[lanorothwolf]

Narrators accent is just perfection, they could describe taking a dump in a way that would sound really smart.