Supermassive black holes | Stars, black holes and galaxies | Cosmology & Astronomy | Khan Academy
About | Information | History | Online | Facts | Discovery
Supermassive Black Holes. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/cosmology-and-astronomy/stellar-life-topic/quasars/v/quasars?utm_source=YT&utm_medium=Desc&utm_campaign=cosmologystronomy Missed the previous lesson? https://www.khanacademy.org/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/v/black-holes?utm_source=YT&utm_medium=Desc&utm_campaign=cosmologystronomy Cosmology & Astronomy on Khan Academy: The Earth is huge, but it is tiny compared to the Sun (which is super huge). But the Sun is tiny compared to the solar system which is tiny compared to the distance to the next star. Oh, did we mention that there are over 100 billion stars in our galaxy (which is about 100,000 light years in diameter) which is one of hundreds of billions of galaxies in just the observable universe (which might be infinite for all we know). Don't feel small. We find it liberating. Your everyday human stresses are nothing compared to this enormity that we are a part of. Enjoy the fact that we get to be part of this vastness! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Cosmology & Astronomy channel: https://www.youtube.com/channel/UChNPnEkW8LYZ5Rwi8_A2-DA?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Comments
-
I bet the point at the center of the black hole is not infinitely small..
-
Mind=Blown
-
ya.you are right.Newton's third law tells us that even light attracts bodies with mass,although small but not zero.
-
After watching this video I then played the music Muse - Supremassive Black Hole
-
You are right in that photons have wave particle duality, they can be considered as particles and waves, however these particles are still massless and therefore SHOULD be unaffected by gravity. The answer lies in the theory of general relativity which gives a more accurate picture of gravitational effects than the Newtonian explanation due to gravity being a distortion or bending of space-time through which light also travels and can be affected by gravity.
-
Billions! wow never knew it got that high
-
is there anything khan academy doesn't know?!
-
What if a super massive blackhole got so big, it began to consume all the matter in the universe & space itself, until the infinitely violent barrage of incoming matter and space actually blew up the hole causing a whole new universe to expand with another big bang. It could have happened an infinite number of times.
-
whoa
-
@pvplayer07 He explained that theory before the theory of the Primordial Black Holes.
-
@midgeamoo This is just my what i think and it might be wrong but if you look up "double-slit photon experiment" it strongly suggests that photons can exist as both waves and particles, which can be affected by gravity. Mind blowing stuff.
-
Incredible~ Also a supermassive black hole devoured all the dislikes.
-
Is it possible that 2 or more black holes could collide to create these super massive black holes?
-
Why is it that photons are affected by very strong gravitational forces if they are massless? Is it because of mass - energy equivalence or am I missing something?
-
dont i wish u were my physics teacher!
-
after the electron degeneracy pressure is exceeded, there is a supernova. so after the neutron degeneracy pressure is exceeded, is there another supernova? or something of the sort?
-
@Jigiligy its infinitely small. they say that because mathematically, they arrive at infinites. the laws of physics as we have them understood today, break down in black holes. the math just doesnt work. but when we do figure them out, the infinites should be replaced with numbers.
-
@KryonMagneticService you are mistaken. if they created a black hole on earth, i wouldn't be here typing this comment, even if it is a "minute black hole". a black hole is a singularity, which means all infinites. if that was created on earth, we'd all be dead. what they've done so far is they've collided protons and found that these protons are made up of even more fundamental particles, such as quarks.
-
@rolingpingu read the book The Black Hole War by Leonard Susskind. black holes are still not fully understood yet, but all the different theories and how they came about them, along with several other quantum theories are all covered in that book. its a great read for anyone interested in theoretical physics. im at the point in the book where he said that that specific characteristic that you just mentioned, actually brings upon the downfall of the black hole..i'll find out how when i continue
-
@rolingpingu Galaxy, or universe in general, yes.
9m 29sLenght
251Rating