Comets: Visitors from the Frozen Edge of the Solar System - Professor Carolin Crawford

Millions of dirty icebergs orbit around the Sun in a huge cloud of debris almost a light-year in radius. These are all pristine relics of our primordial Solar nebula. Only when one tumbles towards the inner Solar system does it heat up to develop into the spectacular apparition known as a comet.
The transcript and downloadable versions of the lecture are available from the Gresham College website:www.gresham.ac.uk/lectures-and...
Gresham College has offered free public lectures for over 400 years, thanks to the generosity of our supporters. There are currently over 2,500 lectures free to access. We believe that everyone should have the opportunity to learn from some of the greatest minds. To support Gresham's mission, please consider making a donation: gresham.ac.uk/support/

[@DaMav]

She is a spectacular lecturer. Her series on astronomy should be appreciated by students of all ages.

[@peterwild8862]

I

[@ZeedijkMike]

I know this is a few years old, but it's still facinating information. Love Carolin's lectures. Which she would make more. But I also understand that it takes a lot of time to prepare.

[@johnries5593]

That and she doesn't have that job any more. There are definitely plusses and minuses to Gresham's policy about how long its professors serve.

[@MrTommy4000]

love the comets are like cats analogy. just when i think i'm getting a grip on our surroundings, along comes a comet, traveling off the flat plain of solar orbits, and sends me back to scratching my head

[@netional5154]

I was aware of a couple of isolated facts before seeing this presentation, but now the entire picture is much more clear to me: why comets possibly/probably brought the water to earth, the origin of meteorite showers, the nature of the Oort cloud.

[@freddyvazquez7592]

Great lecture! Great speaker! Congratulations!!

[@praaht18]

Fascinating. Very good.

[@kurtsalvesen705]

Thanks you very much back in the Day.Seven Stars 2018

[@markkinnard796]

Nice explanation of comet tails.

[@lasvegasseo2010]

Interesting lecture - nice presentation

[@freshrr2]

Excellent presentation

[@jacksnedden8161]

Excellent!!!

[@LyricsVideoFav]

I love this topic "Comets"

[@brandonwells7804]

LyricsVideoFav

[@pransipandey2864]

Excellent...

[@ianian8022]

Would like to hear more about the mechanics of the proto giants tossing these Oort objects out every which way. To my tiny mind it seems easy to make a ball by squashing things inward but to have a shell form from things outward bound not so much.

[@jimroy2002uk]

Brilliant.

[@aishabello3588]

Max Power tv k

[@will2see]

the excavated material from the Deep Impact fell back and covered the crater??? this doesn't make sense to me.

[@alirio9858]

will2see .

[@lizabin8]

Interessante

[@ianwixom7305]

Joanne Okano, comets can retrospectively be a space ship, but probably not how you would interpret it. Comets is an infusion of different elements and compounds.

[@KJ-bt3sj]

Hello

[@butch3535]

Knitting-casting on

[@jitendraraj8455]

Everett Hayden

[@ianian8022]

Comets are clearly bad business.
Last time Halley's comet came round I snuck out the night before and threw a load of rocks on my mate's front lawn.
Anyway a couple of weeks after I was walking past and saw his wife cutting the hedge.
Hiya Julie! Why's Chris got you doing the gardening?
Hi Ian. I don't know, between you and me I'm really worried. He hasn't been out the house for weeks.....

[@nemesis3648]

a good lecturer is someone who teaches facts and not fallacies............

[@mariavalencia5198]

Quierelesamen.de.los.estados.unidos

[@eljaylotoa7178]

I" inn. B by l

[@ericascott5348]

Gchd

[@rather1047]

kupa

[@islemhmad5307]

Rather itala

[@blackberetpuppets]

Are comets what I think they are...space ships?

[@theelectricorigins846]

The comet nucleus a solid chunk of ice???? How false! How many papers stating small or traces of water on the surfacess of comets do you want? Ten cents pwer paper'?????

[@bothewolf3466]

Nasty little derisive scoffs from the audience at the beliefs of people who lived hundreds of years ago, and whom clearly did not have the benefit of today's knowledge are unnecessary. Their noses so highly held in the air and not educated themselves to know enough that, had they lived then, they too would likely believe the same. The speaker did well, but the audience made themselves seem like typical collegiate elitists.

[@nemesis3648]

water and ice!!!!!!!!.....keep up with the latest news.............comets are local and contain no ice......an old idea finally put to rest.........

[@nemesis3648]

most science written to date is very questionable and some positively ludicrous.......