The Sun, our Nearest Star - Professor Carolin Crawford
Without our Sun, there would be no heat, no light and no life on Earth. An eleven-year cycle of magnetic activity modulates its appearance, and the occurrence of eruptive events such as flares and coronal mass ejections. I shall discuss how these, in turn, affect the Earth - and how the Sun currently does not seem to be behaving as expected.
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/
Пікірлер: 60
Carolin Crawford is brilliant!
@jvt1226
4 жыл бұрын
She is well read and cares about the subject. Let’s see if she cares about the truth.
thank you dear professor, not only I like your lovely lectures but also I can listen to them several times... It's really a pleasure...
I have no clue who would dislike this. Maybe the flat/young Earth bacterium. Anyway, it took me several hours to get through this from taking notes and contemplating. My mind truly went on a journey 90 million miles away. Thank you. I will watch this many times.
She makes every topic very interesting.
A great lecture, as always!
More lectures, please!
@jvt1226
4 жыл бұрын
Um, mort truth please.
No wonder she's a professor. Good teacher to have.
Yes. very good communicator. More please!
Please keep it up to destroy ignorance of people
Very enjoyable lecture.
Excellent. Thank you for your passionate and well arranged content. Taking the technical to the masses.
A great lecture as usual Carolin Crawford.
Carolin is probably the best Astronomy lecture r I have ever heard.All that information coming out without any reference to notes at high energy and enthusiasm Brilliant!
Outstanding knowledge of physics
wonderful
Great videos, thanks for uploading
i'm all in
What an excellent presentation! Thank you so much.
19:59 I love how chill she says this
Thank you guys, I watch all your astronomy lectures.
The Korean record is actually in Chinese. Korean in the 12th century did not have a written language (the Korean alphabet was invented some centuries later); rather all written records were in Chinese, which all educated Koreans could read and write.
Why did the solar wind basically turn off for TWO days in 1999? Definetly not a nuclear furnace.
As an American, it's nice to know that in the UK, people in the media or who do a lot of public speaking no longer feel the need to lose their regional style of speech and instead put on that BBC John Snagge accent.
We're due for anothe Carrington size CME.
Nice one Love Carolin Crawford
If you sell t-shirts with Prof. Crawford - I want one!
I always thought most of the mass in most stars is the core and radiative zone. I thought the convective zone was red hot vacuum. I might be mistaken. I am calling vacuum anything less dense than water.
Madam could you make difference between 1st and 2nd generations of stars including sun
A couple questions. is the Photosphere the only layer that produces visible light? 2nd, if the sun didn't have the magnetic lines, would the sun be exponentially cooler?
@krell2130
4 жыл бұрын
the sun is cold. eric dollard et al taught us that
BOO! NO QUESTIONS... :(GOOD LECTURE!
The Sun emits a billion Kilograms per second of ionized hydrogen into space, some of it captured by Earth's gravity and magnetosphere. Considering that oxygen is the most abundant (and reactive) element it the Earth's crust, could this explain why our planet is mostly covered in water?
Why sun is not neutron stars if so what is the difference between neutron and hydrogen Acumullated stars as sun.
At this early juncture in the suns life how is anything heavier than helium present?
@ronaldderooij1774
5 жыл бұрын
The sun is a collapsed gas cloud that was enriched by a big supernova at 20 lightyears away from that cloud. The shockwave probably initiated the collapse of the gas cloud forming the sun, but it also enriched it with all the heavy elements (including the stuff you, me and the earth is made from).
@staysea36
4 жыл бұрын
the sun is electric it doesnt burn anything, her model is false
@dominiccolgan3031
4 жыл бұрын
You weren't paying attention to Carolin as she told you the heavier elements were from a previous supernova which formed part of the material from which the Sun was formed
Good day Are you aware of the Electric Universe Theory?
the sun has acne!! this is because it is in in teenage years, humanly speaking 😊
@FlockOfHawks
5 жыл бұрын
Halfway through its life cycle , more likely . . .
@ronaldderooij1774
5 жыл бұрын
It is in human terms, forty years old. Still OK, but now we enter the phase of slow decay (increasing heliumburning slowly, very slowly begins the path to red giantism). In 800 million years the oceans on earth will start to evaporate away. The sun will get brighter and brighter and bigger and bigger, eventually swallowing our earth in 4 billion years from now.
The magnetic field of the sun is generated by a Plasmoid Torus at its core.
@camilojazzfernandes
4 жыл бұрын
hahaha ... looks like someone is reading Theoria Apophasis ... hahaha
32 students who flunked her class disliked this video.
@cuscof2
4 жыл бұрын
The 'Electric Universe' loonies are the ones who down vote these lectures. They're fanatical believers that the sun is actually heated by a stream of in-flowing electrons that somehow have evaded observation to this day. Most of them are followers of Velekovski as well.
outdated and wrong the electric universe model explains perfectly that which is true about the sun
@butHomeisNowhere___
4 жыл бұрын
👎
5g/cmc is not dens !!?? Gotta be kidding ! This allegation appear at min 30:35 in this movie .
Why didn't she mention that the sun is actually green?
@staysea36
4 жыл бұрын
this poor woman has no idea what she is talking about. our sun is electric
"Our" nearest star? And do we own more stars?
@stevefromsaskatoon830
5 жыл бұрын
Our as in the one that's closest to us
Its not a gas, its a plasma - gas has nothing to do with it.
@MyTorturedEyes
5 жыл бұрын
Robert do you know what plasma is?...its electrified gas!..its still gas! do some more research!
@ronaldderooij1774
5 жыл бұрын
@@stevefromsaskatoon830 Well..... not quite. Only when the charges are moving it is electrified. Theoretically, you could have a non-electrified plasma, I think. And thus plasma could be regarded as the fourth state of matter and not as a gas.