Astronomy with Finlarg, Part 3: Introducing Gravity

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1. I know you say you aren't a teacher - but you're managing to teach this teacher a lot, and in a way I can understand easily. Thank you for that.
2. Hi man. Actually I heard that some scientists mathematically proved that gravity actually does not exist as one of the 4 elementary forces, and is actually cause by 2 gluons (the elementary particles which cause the strong forces - the forces between quarks) pairing up. But this is an interesting video anyhow and it is obvious that you put a certain amount of effort in the animations. I specifically liked the Schroedinger's cat experiment picture when saying "here's a thought experiment". Nice one :)
3. @ReasonableAssumption continuation: Objects in orbit follow an elliptical path, which IS a straight line through spacetime. Light itself is bent by gravity, but we can only see it if it's close to a very massive object, such as the sun during a total eclipse or a distant cluster of galaxies. This is because the speed of light is SO fast! The amount light can be bent going past a planet is so tiny we wouldn't see it. Hope this helps...
4. @ReasonableAssumption You're welcome! I plan to cover relativity in more detail in a future video, but like you, I don't always have as much free time as I'd like... The fact that space and time are connected comes from special relativity, where objects travelling at speeds approaching the speed of light undergo time dilation and lorentz contraction. General relativity says that spacetime is curved by objects with mass, more so by more massive objects. continued...
5. Thanks again for a thoroughly engaging video. If you can explain in a meaningful way, space-time curvature in layman's terms I will owe you a debt of gratitude. My forte is ethics which has fascinated me since I can remember. I for some odd reason went on to computer science and have nowhere near the time needed to explore astrophysics as I would like to. Thank you for bringing education to the masses :) 
6. @unassumption Great that you learned something new :) Next episode uploading as I type this... Gravity is sooooo weak on a small scale, but there seems to be know limit to how far it can reach...
7. lol that gravity is by far the oldest known force...and is the least well understood :/
8. Nice use of footage, so many ways our world could have been different. The common centre of gravity thing helped me understand this. If EM force could travel gravity's distance it'd make things spherical too, since all forces go out in all directions as a sphere. I always wondered why mass is acceleration due to gravity AND resistance to force, knew there must be a connection; now i know thanks to your description of realitivity, thanks :) look forward to your next vid. 
9. @tenagliac I'm glad you think so, thank you!
10. Nicely presented and very educational. 
11. @finlarg The kids are pretty savvy. If they want to find it on their own, that's their biz.
12. @MacNutz2 Very kind of you to say so Mac! I know my approach is a little unconventional, especially the order in which I introduce different subjects. My hope is that my videos will help people who might not have had much interest in astronomy to go and check out Carl Sagan, Brian Cox and others... it's a subject I can't get enough of!
13. @talkingprimate I wouldn't recommend the subject of witchburning to the young or vulnerable... the horrors which some humans are capable of can be very disturbing. I hope my videos aren't too technical for a 13 year old, I try to make them suitable for all, but I suppose it depends on the individual...
14. @finlarg maybe the "heaviness" of gravity, even though Gravity doesn't really make things heavy. It's a perception. Why use it? You could say seriousness, or solemness or ANYTHING! Well screw it. Nice work anyway! I showed your videos to my 13 year old. Just the science ones. NOT the one with the witches...too young. But I would if she were older.
15. @Puchicas9 You really can't study physics without learning some astronomy and you definitely can't get a good grip on astronomy without some physics! The sheer scale of the cosmos in distance and time never ceases to amaze me... we are LESS than a drop in the cosmic ocean, smaller than a grain of sand compared to the entire planet! Thank you for commenting!
16. @talkingprimate Thank you! It doesn't make sense in terms of physics, but maybe it has something to do with graves and seriousness?
17. Way back when I was an undergrad liberal arts major, I had to take one year of "science with lab." Fortunately, astronomy was an option. The professor was an old German guy, and he could make us laugh! One thing that I learned was that astronomy was, in many ways, a branch of physics. I had no concept before that of how necessary physics was for understanding all those nice lights in the sky! Thanks for this video which so clearly illustrates the basics.
18. Great work, AGAIN! Ever wonder why they say "Gravity of the situation?" By your definition, that phrase sounds silly! 
19. @dgeypscun Thank you! It's ironic that one of the most scientifically accurate films (2001 A Space Odyssey) was made when space travel was in it's infancy. Now you rarely see sci-fi where those at the flight deck are in zero G and rockets roar as they zoom by in the vacuum of outer space! 
20. @TheBlackSpider82 Thank you very much!