The Sun: Crash Course Astronomy #10

  • Published on Mar 19, 2015
  • Phil takes us for a closer (eye safe!) look at the two-octillion ton star that rules our solar system. We look at the sun's core, plasma, magnetic fields, sunspots, solar flares, coronal mass ejections, and what all of that means for our planet.
    This episode is sponsored by Squarespace:
    Crash Course is on Patreon! You can support us directly by signing up at
    The Sun is a Star 1:28
    Plasma's Magnetic Fields 6:11
    Sunspots, Solar Flares, and Coronal Mass Ejections 7:09
    How the Earth Reacts 9:18
    PBS Digital Studios:
    Follow Phil on Twitter: badastronomer
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    Hubble extrasolar planet search field in Sagittarius: [credit: NASA, ESA, K. Sahu (STScI) and the SWEEPS science team]
    The Sun: [credit: SDO/HMI]
    The Sun: [credit: NASA/SDO/AIA]
    Earth: [credit: NASA's Earth Observatory]
    Fusion in the Sun: [credit: Borb]
    Empire State Building:
    Sun Structure:
    Photospheric granulation:
    Corona: [credit: Phil Hart]
    "Magnet0873" by Newton Henry Black - Newton Henry Black, Harvey N. Davis (1913) Practical Physics, The MacMillan Co., USA, p. 242, fig. 200. Licensed under Public Domain via Wikimedia Commons -
    Strange Days On The Sun: [credit: NASA's Goddard Space Flight Center Images courtesy of NASA/SDO]
    Under the Sunspots: [credit: NASA/Goddard Space Flight Center Conceptual Image Lab]
    Raining Loops: [credit: NASA's Goddard Space Flight Center/SDO]
    Coronal Mass Ejection: [credit: NASA]
    Soloar Close-ups: [credit: NASA]

Comments • 1 484

  • Zain_mood
    Zain_mood Day ago

    One day we will suck up it’s power and move on

  • lhundrub gyaltsen
    lhundrub gyaltsen 2 days ago

    Wht if we manage to make an atomic bomb as big n as dence as sun. Can the blast energy by the bomb be much highr thn sun/ stars supernovic blast??? ☀vs💣

  • Henter 2020
    Henter 2020 2 days ago

    Sains Kehidupan dan Fizikal....

  • Josephine Reyes
    Josephine Reyes 4 days ago

    The sun is a yellow dwarf

  • Barbara Maj
    Barbara Maj 6 days ago

    How did you come up with 700 million tons per second? I think you may have forgotten to carry the three in your calculation. It seems scant for a sphere 400,000 times our earth. (maybe you were talking about the daylight side and not the night side... I'm sorry.)

    • Dina Hamad
      Dina Hamad Day ago

      its actually 1 000 000 times the size of our earth

  • Gavin F
    Gavin F 9 days ago

    When you say “degrees” could you please state Celsius, Kelvin or Fahrenheit? Thanks 👍🏽

    • Dina Hamad
      Dina Hamad Day ago

      he said Celsius. and in this case kelvin is basically the same as Celsius as there is only 273 degrees Celsius between the 2 units which is insignificant in this case.

  • David Omotade
    David Omotade 12 days ago

    I carry a lot of gas in me to

  • Barry Deeks
    Barry Deeks 13 days ago

    end sex crime and vilify me

  • Haaris Mohammed
    Haaris Mohammed 16 days ago

    F koj

  • Knulps Reincarnation
    Knulps Reincarnation 19 days ago

    I have no other reaction for your videos than 😮 😮 😮 😮

  • carter seiber
    carter seiber 21 day ago +1

    I thought when he said "you probably wouldn't be watching this video now" he meant we would all be dead, lmao.

  • Luis Mata
    Luis Mata 24 days ago

    Ok boomer

  • Esso Blue
    Esso Blue 25 days ago

    Plasma arch, Natures capacitor blowing a fuse.

  • Jayden Lee
    Jayden Lee 28 days ago

    who here just paused the intro to look at the facts

  • roop298
    roop298 29 days ago

    Cat: what is it? Repeat, ad nauseum.

  • Raycar
    Raycar Month ago

    If the sun is powered by a nuclear reaction of hydrogen why are we not duplicating that with our nuclear reactors?

    • Raycar
      Raycar Month ago +2

      @Aimee L I agree it would take a lot of energy. It would also take a lot of hydrogen to last as long as it has. That's why it doesn't make sense to me. If we can't duplicate something that occurs naturally then we are doing something wrong.
      The Safire Project is a working model of the Sun. Check it out.

    • Aimee L
      Aimee L Month ago +1

      It take a hell of a lot of energy to fuse hydrogen and we dont currently have a way to recreate the conditions needed. However, scientist are working on it so maybe in the future this will be an option

  • Raycar
    Raycar Month ago

    Not buying it!
    Where is the evidence for a nuclear powered sun?

  • matthew clark
    matthew clark Month ago

    seeing this video now in 11th grade

  • Thoth Al Khem
    Thoth Al Khem Month ago

    I am 64 and when I was young the Sun was YELLOW - NOT white........

  • Evan Santana Cruz
    Evan Santana Cruz Month ago

    Am I the only one to notice they used the Angry Sun from Super Mario Bros. 3 at 0:48

  • Carina Funk
    Carina Funk Month ago

    This is so helpful. I'm taking astronomy 101 and my professor goes way too fast, so this is so much easier to understand. Amazing video.

  • valor36az
    valor36az Month ago

    Watch the movie sunshine by Danny Boyle

  • 18wheeler76
    18wheeler76 Month ago

    The Sun is fake add.Take a picture or video of it and see for yourself.or watch my vids.They have a white patented laserbeam artificial sun blocking out the real Sun.Very easy to see if yountake a picture or video.

  • daniel f
    daniel f Month ago

    What a sexy man. WOOF!

  • Wayne andrews
    Wayne andrews Month ago

    You can understand why this dude is not married ..

  • 朱航廷
    朱航廷 Month ago

    This is good

  • Crimson Kng
    Crimson Kng Month ago

    Theoretically, if I could position myself in space with both the Sun and Earth in my vision ... and if I held a big, opaque board that blocked the sunlight from the Earth ... then, if I lifted the board to let the light through, could I actually see the light travel from the Sun to the Earth over the next 8 minutes (assuming that there's some space dust to reflect the light)?

  • Javier Mk
    Javier Mk Month ago

    Thank you. But why so fast? what's the need?

  • complete channel
    complete channel Month ago

    Light takes approximately 8secs to reach earth from sun
    0:35 beautiful
    Who are with me??

    • Robert Burley
      Robert Burley Month ago +1

      Light takes approximately 8mins to reach earth from sun

  • bailey04ful
    bailey04ful Month ago

    There we go with this evolution lies. There’s no such thing as evolution and the sun was created by a powerful GOD.

    • bailey04ful
      bailey04ful Month ago

      Zeen Daniels ok lets get to the facts. Did life come from a meteor? And how many steps required for a ape like creature to evolve into a man? What created DNA? The Big Bang? I hope that last not your answer.

    • Zeen Daniels
      Zeen Daniels Month ago

      @bailey04ful Is your god ok with you insulting people like that? Just saying...
      Truth is, I'm here because my mom and dad... No god created me. Us not knowing the origin of life doesn't mean there must be a god. The day that your god (or any other for that matter) speak to all of us, at one, telling us that he is the only god, that we must stop fighting wars and be nice to each other, that day I'll believe.
      Have a nice day 👍🏼

    • bailey04ful
      bailey04ful Month ago

      Zeen Daniels actually you’re the proof, the fat. That you or baby scientist can create a human body from nothing, where do you start? Chemicals can’t create humans, you can tell me all the building blocks of what humans a made out of but you can never create a human. The day I see chemicals put a human being together then I’ll become a atheist. You moron

    • Zeen Daniels
      Zeen Daniels Month ago

      Too bad (for you) that your claim cannot be proved 🤷🏻‍♂️

  • Dana Kelley
    Dana Kelley Month ago

    The sun revolves around the earth. Morman law. Morman's rule! Yeah!

  • Angel Apolinar
    Angel Apolinar Month ago

    The 1859 event DID knock out the world's power grid-but all we had were telegraph systems.

  • jhonny rodriguez olguin

    And that take us to the volcanos, this is amazing your super, great channel

  • Bobby Willis
    Bobby Willis 2 months ago

    Watching all of these at 2x speed for my astronomy solar system test tomorrow

  • malignor
    malignor 2 months ago

    It would be nice to cover the material density at the different depths.

  • zxx5
    zxx5 2 months ago

    1 million Earths would fit into the Sun!
    and the Sun is GOD'S shadow, that's how powerful and Holy He is, all the praise goes to Him, Mighty Lord,
    also did you know He came as human to die for our sins on the cross? now you can guarantee your eternal salvation afterlife with Him! all you have to do is believe. Cheers! xDD

  • DuhborAtYour Door
    DuhborAtYour Door 2 months ago

    good job mate. you did good.

  • Randomly new
    Randomly new 2 months ago

    Why do I feel like eating the sun

  • David Pirani
    David Pirani 2 months ago +1

    Electromagnetism, ether ,universal compression

  • David Pirani
    David Pirani 2 months ago

    Black hole sun ,celestial sphere

  • Ramon Omari
    Ramon Omari 2 months ago

    How does Dyson Sphere technology deal with CME?

  • Aidan Persad
    Aidan Persad 2 months ago +2

    “.....and that’s more than 5 football fields!”

  • Marcel Baumann
    Marcel Baumann 2 months ago

    18K plus people who seem not to think at all. This guy is nothing but a liar. The sun is local and within the firmament. Forget about the space BS from all these liars who just want to keep control over the tax money funded to their dirty scheme.

  • Dean Peterson
    Dean Peterson 3 months ago

    Is dark matter actually solar winds from trillions of stars?

  • Samrat Naruto
    Samrat Naruto 3 months ago

    Sunspot darkens the sun? Who decided that? The sun dies after 5 billion star? Who decided that? The only one who gets to decide these things is me. Lord Godcanor-sama

  • kok fah chong
    kok fah chong 3 months ago

    The sun is not a lump of hot hydrogen gas. Hot gas can't coalesce together in one piece. As a matter of fact, the sun is a lump of dense radioisotopes in which decaying radioisotopes emit out intense heat and light. The sun undergoes fission process on its radioisotopes, and not fusion on hydrogen gas as widely claimed. Tokamak reactor can't even produce a trace amount of helium gas which clearly shows that fusion process is a bluff. Einstein's famous equation, E=mc^2 is wrong otherwise garbage also can be used to make nuclear bombs as long as it is matter or it has mass. Energy and matter can't interchange one another according to Einstein's famous equation. One must have photons before one can emit out photons. Photons are particles and they have mass. All forms of EMWs including heat and light are dynamic photons per volume per time in different saturations. Hydrogen and helium gases are diamagnetic. On the other hand, dense radioisotopes are paramagnetic with a huge deposit of them within the core of the sun will give rise to a rather strong magnetic field. that surrounded itself. Only truly dense elements will sink within the core of the sun. Definitely hydrogen and helium are considered to be too light to be presence within the core of the sun. If you are interested in real discoveries, I would recommend you to read my book, The Unification theory - Volume One and you will be amazed with lots of new, interesting discoveries. In God I trust.

  • J'von Fair
    J'von Fair 3 months ago

    Question: there are two types of monopoles: 1 is a positive charge a gives electrons, 2 is a negative charge and takes electrons. When together they create an electric feild. By twisting or spinning these two feilds create a magnetic feild? Is this plasma?

  • Rosie g
    Rosie g 3 months ago

    My brain is broken

    VICKY VENGURLEKAR 3 months ago

    Great teacher

  • Brendon Phillips
    Brendon Phillips 3 months ago

    if the light of the earths day being emitted from the sun which is so erratic, why is it then that our day is a constant light ? Unless of course the light of the earths day is an invisible light that has nothing to do with the sun's ruling light
    Jesus of Nazareth is The LORD

  • María Carla
    María Carla 3 months ago

    did you know that the Sun and Rihanna are the same thing? go see my latest video to find out why :D

  • Lulea Collins
    Lulea Collins 3 months ago +1

    there is so much information coming out of his mouth right now and my brain is about to explode

  • Peasant
    Peasant 4 months ago

    If only i could be so grossly incandescent \[T]/

  • Aragorn Stellar
    Aragorn Stellar 4 months ago

    That’s a lot of helium balloons.

  • Mike Or
    Mike Or 4 months ago

    A solar flare is nothing compared to a coronal mass ejection. CME's are tens of thousands times stronger than flares.

  • freddan6fly
    freddan6fly 4 months ago

    I found your series during a hospital visit when being too tired for reading, Really great stuff thank you Phil.

  • PointyTailofSatan
    PointyTailofSatan 4 months ago

    What is really surprising is that the amount of heat produced in the core is actually very small in terms of volume. The amount of continuous energy produced in a cubic meter of the Sun's core is only about 280 watts, roughly the same as 3 regular tapered candles. It's the huge size of the core, and the resultant sum of all this energy that makes the Sun so hot.

  • Agent Washington
    Agent Washington 4 months ago

    I've been writing a post apocalypse story where a CME struck the Earth, causing world wide black outs. I just happened to set the CME event in 2012. Didn't even know that actually nearly happened that year until I watched this.

  • starCO2oil
    starCO2oil 4 months ago

    10:00 onward. 2012 was not in our direction as he says now 2019 July 29 to Aug 2. They think part of coronal hole is toward us. Get water storage for needs.

  • Husseini_14
    Husseini_14 4 months ago

    sun aint no star mf earth is flat