Comets 

Backup plan for comet collision... Everyone sit comfortably, lace your hands behind your head,bend at the waist placing your head between your knees and... Kiss your butt goodbye. I know its old (Thank you Richard Pryor, rest in peace) but, oh so fitting.

It’s astounding to note that a seemingly rational show called ‘Naked science’ would utterly hide the fact that the sample returning capsule had a crash landing, due to failure in opening of the parachutes at the important moments of atmospheric entry. Therefore, some amongst the planetary science community also supports the idea that the aerogels could be contaminated with terrestrial dust instead.

It's something unbelievable what we see and learn in this program. Nothin is there to compare to this program. I love it beyond anything else...

Comets are objects which orbit the Sun with varying periods but they must have an aphelion distance which is at least nine times their perihelion distance. It can be greater and in most cases is but this is the minimum distances involved. Comets develop tails because as their speed increases their internal gravity decreases in force. Their surface material can no longer be held to their surface mass and becomes srung out as a tail behind the head of the comet .Most comets have a large component of water as ice mixed into the body of material comprising the comet at aphelion. At perihelion this ice is thawed into water and when it is refrozen it breaks up additional solid material into smaller pieces. Also on every perihelion passage some small part of the total mass is lost through centrifugal actions. Mass determines orbital configuration and every comet is losing some amount of time as a period on each orbit. Eventually one of two things will occur to a comet. One is it will lose so much mass that it cannot retain an integral mass as an individual mass and it on its final orbit the individual pieces crash into the Sun. Secondly it falls below the minimum requirements of a comet status as to its aphelion and perihelion distances and its tail recollects onto its surface and it become just an object, often mistaken as an Asteroid , orbiting the Sun at some distance from the Sun.

Always wondered why we couldn’t put a telescope & transmitter on a passing asteroid or comet. Sit back and enjoy the information gathered on its journey.

11:34 RUN EVERYBODY RUN IT CARL'S.JR!

thanks for all the great videos and info

Comets are in general bodies of disconnected masses held together by frozen water and other frozen liquids. In order to become a comet a mass must have a aphelion distance which is nine times greater than its perihelion distance. It can be greater than this but not less. When comets pick up speed in their fall toward the Sun , they lose internal gravitational impetus. Their surface material becomes unglued gravitationally and is redistributed as a following tail. When the enter the sweet zone the ice thaws into in some cases water and permeates the cracks and crevasses of other solid material. When it freezes it breaks this material intro smaller bits of matter and this results in an extension of the tail. But on each perihelion passage it looses some mass through evaporation and velocity speed of the outermost tail points. Thus most comets become smaller with each orbit and this changes their period. Halley's comet loses about four days on each orbit

Chocolate sauce in comets - that confirms my theory of a universe filled with sweets. Jupiter is a big ball of fudge, and Saturns rings are made from a vast amount of sprinkles.

That beat in the first second of this video made my heart start racing 🤣

Excellently put thanks. Yet another fascinating video.

Mrs Richards: "I paid for a room with a view !" Basil: (pointing to the lovely view) "That is Torquay, Madam ." Mrs Richards: "It's not good enough!" Basil: "May I ask what you were expecting to see out of a Torquay hotel bedroom window ? Sydney Opera House, perhaps? the Hanging Gardens of Babylon? Herds of wildebeest sweeping majestically past?..." Mrs Richards: "Don't be silly! I expect to be able to see the sea!" Basil: "You can see the sea, it's over there between the land and the sky." Mrs Richards: "I'm not satisfied. But I shall stay. But I expect a reduction." Basil: "Why?! Because Krakatoa's not erupting at the moment ?"

very excited for this late night journey, bless

Love this stuff - can't wait to see better photographs of asteroid surfaces!

Nice video. It rocked my world.

Thanks!

This is such a great show thanks for putting this together for RU-vid. DRS.

Ironic that the man who discovered the orbits of comets was also an original proponent of the hollow Earth theory.

Science and technology is up my alley

39:35 from here they start listing options. I think calling Bruce Willis would be another, and the best option.

Thank you Naked Science your updates are really interesting

@20:00 "Short period comets, some are nearly 600 miles across... thats bigger than New York City" Thats the distance from Northern border California to southern border California. Someone wasn't thinking or fudged a few numbers here..

"luckily today we have something the dinosaurs didnt, we're smart." Velociraptor: "what, bitch?"

when they livesfream an impact I will not leave this screen again

28:04 dude talks like I do when my nose is stuffed. He's way more fascinating than the actual comet talk

Seeing the KT boundary, (the worldwide debris layer), is on my bucket list. Your visual of the comet impact 65 million years ago - mind blown. It really happened

Saw a very colorful and beautiful one it had green and gold color on its tail

Hale -Bopp, ba duba dop Ba du bop, ba duba dop Ba du bop, ba duba dop Ba du, yeah-e-yeah Hale -Bopp, ba duba dop Ba du bop, ba duba dop Ba du bop, ba duba dop Ba du, yeah-e-yeah

Instead of catching a wave. Am catching a comet...

Comet dust is what Santa uses to help the reindeer fly.

Awesome

12:43 to 12:51 The most savage line ever said

"Luckily we're smart".... lol

37:08 The meteor skipped on the upper atmosphere like a stone skipping across a pond. It was about the size of a bus.

I have so much respect for these engineers tech people and scientists the rocket's and spacecraft they design are top notch and it gives us a better understanding how we humans got here and how the universe was formed so a massive 👍🏻🇬🇧✌🏻

The Earth is covered with Carbon based lifeforms, other planets may be covered in life forms based on other elements.

Nice

What a magnificent achievement! Thanks for helping me understand how water arrived on earth, and how our molecules were transported from their origin to earth. If all mater comes from nuclear fusion, it stands to reason that upon ejection from a supernova it coalesced into clusters whilst travelling at enormous speed away from its origin in what we call Comets.

DAMN VIDEO KEEPS FREEZING

Check out Survival Beneath Yucca Mountain. It starts with an civilization ending asteroid but the bunker complex under Yucca Mountain is a sanctuary for fifty families.

Their comparison of some Kuiper belt comets of more than 600 miles across to the size of NYC makes me wonder about how much of show is scientific.

37:12 I saw a meteorite come in at this angle i followed it from left to right with my eyes across the sky it came in almost completly horizontal. Luckily it was a small one and it stopped burning around 75% of the whole sky if you would measure it horizontal and for a short second or two after the flames stopped i could see a orange piece of what i assume was a iron metorite starting to tumble down to earth but it cooled down quickly and faded into the night sky.

Wonderful video...and the tsunami...almost a comet hit us...Jesus...💥💣💥🌎🌍🌏💥💣💥😰🚬😰

That's so Kool ❤🎉

old boy knows how to skip a damned stone, almost made all the way across!

Click bait I SEE NO NAKED SCIENTISTS

What a show

I love this video

This is now seriously outdated, but still a good intro to the science of comets.

Ok i will start to worry in 1 million years, thanks, i can sleep well every night again.

very nice

I don’t think you need to worry about a comet coming and destroying earth man can do that. I don’t think other planets would want us we can’t look after the one we have.

Nine planets damnit. I dont care if scientists say dwarf. Doesn't matter. Nine!

I am going to keep my 1974 comet.

great

Interesting facts mrNelson1963 congratulations UFO s ALIENS OVNI USA FL NV STATES OTHER ESP SPACE exploration take care

Why not push comets to mars. This would both give us practice moving them but also influence the mars atmosphere.

The great destruction-creation dynamic of life.

Just imagine a comet hitting Yellowstone.

12:43 i think their decomposing corpses supply enough evidence

@35:00 "Instead of wasting money going into space and colonizing other celestial bodies to preserve our SPECIES we should just stay and fix Earth!" oh brother.

Wait a minute, Asteroid and comet are one and the same thing?

26:12... ok, but what was within the impact holes ?

If they were cast out by are gravity, what stopped their travel and turned them around?

There's no chocolate on comet?!! You don't say!

Where did salt water came from? Me I believe there is an intelligent force which designed everything in its proposition and nothing came accidentally.

I hope we are ready when the next one is on course!

So *that's* what it's like when worlds collide!

38:30 starts speaking about earths defense against asteroids.

18:30. Does water multiply then? . Like mars? .

Thank you jupiter

I hate it, every time, as he says... 8 planets. I miss Pluto :-s

That's where life comes from it contain soil water carbon all the ingredients you need for life so can I be that life came from s comet that hit earth also it could have kickstarted a atmosphere

i think comets are the Bee's of the cosmos. Hitting planets and spreading the ingredients for life to evolve. Some say most of the water on earth came from ice comet impacts. Without witch we would not be here

I am only here for the intro music 🎶🎵 🤩jk I watched the whole episode

NASA and their most prized most expensive item aluminum foil

Where else would water come from, must be from COMETS or some chemical reaction

You know the information is reliable when they don't even know the difference between a comet and an asteroid...

"Thousands of comets orbit around us..." yeah, no. With the Oort cloud and Kuiper belt, try TRILLIONS, not thousands.

Not 8 planets, 9. Pluto is a planetoid, isn’t it? Aarrrgg😤!

A comet hit earth about 12,000 years ago and caused the biblical flooding that wiped out most of humanity.

Did they ever find that forwarding address?

I'm not falling for these "cosmic intimidation tactics" Like the Man Here says, they've been flying around for over 5 billion Years..I've had No problems. They don't Scare Me. LOL!!

I think humanity could destroy it's self and earth. before being hit by an asteroid or comet Just saying😅

ITS AN INCREDIBLE PART OF THE EARLY UNIVERSE LEFT,OVER BILLIONS OF YEARS LATER STILL DOMINATING THE ENTIRE GALAXY AS WE SPEAK! ITS ALWAYS BEEN A COMMON PART OF THE UNIVERSE...

It will take me a million years to understand gravity... Don't call me dummy head, maybe I need real magnet to understand gravitational force between objects

#comet2020

The only way we as a species can deal with the permanent threat of comets crossing earth's orbit, is to establish a space elevator program. Using fuels to get to a rocket to save our species is very highly technologically advanced labor intensive work and prone to political subversion for weapons programs, and not ecologically sustainable during a heavy bombardment period from a passing star event.

"wow, the dry ice is cold".....no shit sherlock!

All that special Rich mineral

@32:22 "...threw thousands of tons of dust into the atmosphere." Ummm....there is no atmosphere in space.

Just one issue. Evidence for this is the KT boundary. they find fossils before but not during or after. If this theory is true the the boundary itself would be the mother load of fossils world wide. All dinosaurs were wiped out by this impact and the years following yet the boundary which depicts this time frame world wide is devoid of the extinct fossils world wide.

Two speeding bodies, with rotation involved, don't leave round circles as an impact mark....they leave big marks like the one on the bottom of South America.

Very good ...Thanks...Thinking about this there is a lot of...Ifs maybe we thing we don't know what if.How this how that The very big one is.....We really just do a lot of guessing and hop we are rite for God sake...!

They're not blacker than Wesly Snipes..

Can we call the channel: Simpleton Science ?

At the how worlds...🌎🌍🌏 collated...🎆🎉🎊🎇💣💥💣🎆

9 planets* Pluto still counts!

soon as we get the religion folk out of the way we can advance our science to the point to do something about it. till then we just have to hope nothing is coming our way.

Naked science I love you guys