March 24, 2015 13:35:38
April 25, 2015 02:05:28
Sally Haylock safe Travels,and Blessed Journeys
April 27, 2015 14:22:36 · Reply
Fox Sawyer i ride my biiiiicycle
April 27, 2015 15:56:46 · Reply
Charles Bradshaw I found one of these bikes in a theme park in New Zealand ...I found bang-bang control worked well(2/3 meters after a day's practice), but if i went too long without a switch my brain flipped to my regular bike linear controller. Results were ... humerous. Thanks for sharing !!!
May 4, 2015 08:18:53 · Reply
May 8, 2015 21:59:25
Travis This video is Awesome! Started watching a couple of weeks ago after I saw the Backwards bike video. These 2 videos have me hooked and I really just want to say thanks for everything you do. I would also like to agree with Levi on everything he said. First time I got chill like that in awhile. Thanks
May 14, 2015 20:00:11 · Reply
Weatherlawyer Your man needs to take lessons in communication techniques.
June 1, 2015 18:35:36 · Reply
June 3, 2015 17:42:52
John Markus Add this to your site: document.getElementsByTagName('iframe')[0].src+='&autoplay=1';document.getElementsByTagName('iframe')[1].src+='&autoplay=1'; If you have the video already preloaded once, it should sync.
June 5, 2015 00:26:23 · Reply
Adam Ingle Amazing presentation! The Scientific Method CAN work on YouTube! HA!
June 12, 2015 17:08:07 · Reply
Tibor Schiemann Guys, I know my comment is a bit late, but this rocked! Just the idea of producing two perfectly synced videos from both hemispheres is awesome, not even mentioning the perfect execution or fun you always manage to convey to your audience. I'm glad I'm supporting you - keep up the great work!
June 19, 2015 10:46:55 · Reply
August 1, 2015 04:05:54
September 1, 2015 04:50:04
Earl D Yates Thanks Destin! While I hope that these Scientists are able to find a way to stop the spread of this disease, there are some far reaching implications. This is the first time that I've ever heard of a cancer that is contagious. If a strain of cancer can become communicable among Tasmanian Devils, there is a possibility that some strain of cancer could mutate and become contagious between humans. So, helping to find a cure for these rare critters may in turn, help to prevent a similar outbreak among the human species.
September 3, 2015 21:33:43 · Reply
September 10, 2015 20:05:11
Brian Antonelli Awesome video, thanks Destin! Call me crazy, but I would love to see a video just on how you produced the radar. :)
September 15, 2015 16:01:41 · Reply
Jason VandenBerghe This was AWESOME. And, it might seem like a little thing, but thanks for the Patreon shout-out. Somehow made it real that we're all doing this. :P
September 22, 2015 10:04:24 · Reply
Andre Alforque Thanks for this tour! Definitely helps put the station into perspective.
September 22, 2015 23:53:27 · Reply
View all 12 comments
Jeff Dzado Wait...I thought the closer you are to the planet, the faster you had to move to keep missing it. You're saying the velocity of the Soyuz is SLOWER than the velocity of the ISS? I fully understand that the Soyuz is orbiting Earth more quickly and 'catching up' to the ISS.
March 24, 2015 17:45:46 · Reply
Paul Spooner Awesome video! Just one problem though. At 7:34, the visual annotations mention that Soyuz is moving slower, but orbiting faster. But in actuality, the Soyuz is both moving and orbiting faster, and the ISS is both moving and orbiting slower. Then at 9:02 you make the same mistake, only in the voice-over.
March 24, 2015 17:50:49 · Reply
Trevor Madge I think he said it correctly... Soyuz is moving slower at about 17,000 miles per hour and the ISS is moving at about 17,500 m/h. But, because Soyuz is closer to the earth, the distance it needs to travel to go around once is smaller than that of the ISS, so it gets around it faster.... Soyuz is moving slower but orbiting faster.
March 24, 2015 19:54:34 · Reply
Paul Spooner Your numbers must be off. If both orbits are circular around the same body, then the smaller one will have the higher velocity.
March 24, 2015 19:57:06 · Reply
Trevor Madge If both are orbiting at the same speed (1 "lap" every 90 minutes) than the one with the larger orbit would be travelling faster because it needs to go farther. Just because they're orbiting the same body doesn't necessarily mean one is faster than the other. In this case, they said that Soyuz is travelling around 17,000 m/h and orbits in 86 minutes, and the IIS is travelling around 17,500 m/h and orbits in 90 minutes.
March 24, 2015 20:06:47 · Reply
Paul Spooner You have understand geometry correctly, but misunderstand orbital mechanics. Bodies simply can not orbit at whatever velocity they like.
March 24, 2015 20:08:35 · Reply
Trevor Madge You're probably right that my understanding of orbital mechanics is a little off. I decided to do a little reading and I've been looking at the equations here: http://en.wikipedia.org/wiki/Circular_orbit If I understand them correctly, as the radius increases, velocity decreases and orbital period increases. That seems to explain why the ISS is taking longer to travel around the earth, but it doesn't explain why it's travelling faster. Maybe it has to do with the difference in mass between the Soyuz and the ISS? That's the only other variable in those equations. A larger mass would require a higher velocity.
March 25, 2015 14:59:09 · Reply
Nils R Grotnes Galileo disagrees...
April 20, 2015 22:04:44 · Reply
Evan Hagerty I would disagree with you Paul;what the Astronaut said made sense, although it was a bit confusingly put. One way to look at it through the simplified equation (V^2)/r=9.81m/s^2, which shows that as the radius of orbit increases, the linear velocity of the orbiter increases. Another perspective is that in order to increase the radius of circular orbit the ship must fire a rocket (twice) with the force of this acting in the same direction as the velocity of the ship. The first burn increases kinetic energy, then this is "traded" for gravitational potential energy as the rocket orbits to it's slowest, farthest out point, and then the kinetic energy is increased once again until the orbit is circular. The confusing part is that while increasing the radius of orbit leads to a higher linear velocity, it leads to a longer orbital period. Sorry if I've misunderstood your perspective on this. I found the video fascinating, and I can tell you did too, so cheers!
March 25, 2015 02:49:05 · Reply