Everybody walks past a thousand story ideas every day. The good writers are the ones who see five or six of them. Most people don't see any.

**Comment preview: **Yes, this was a pretty big hole for me as well. It's pretty inexcusable that they would not have pieced this together, especially after doing the time dilation calculations immediately prior to going down, it's not like relativity would have been catching ....

**Comment preview: **Sadly, that is not how time dilation works. The article misrepresents Einstein's Theory and draws some conclusions that do not follow from the Theory of Relativity. We defined the duration of the 'year' as the time it takes the earth to rotate around the s ....

**Comment preview: **Yes, absolutely. In fact, the time dilation between the surface of Earth and the surface of Mars was measured directly with Viking 1, a lander on Mars. You can read more about this experiment [here.](http://adsabs.harvard.edu/doi/10.1086/183144) Special ....

**Comment preview: **>"Special relativity is supposed to be reciprocal, where both parties will experience the same time dilation, but all the examples that we have right now can be interpreted as directional time dilation," Kipreos said. "If you look at the GPS satellites, ....

**Comment preview: **First off, I'd like to say that I'm pretty impressed with the reasoning you've done. Kudos! Unfortunately... Looks like you have two fundamental concepts mixed up here: time dilation due to gravity or relative velocity. I'll just go through it in the order ....

**Comment preview: **What you're missing is the effect of time dilation of the man in the ship. In his frame, the light catches up and passes him quickly (because it's moving at the speed of light, relative to him). In the frame of a stationary observer, it takes a long time ....

**Comment preview: **A mish-mash of sources: closest star is Alpha centauri at 4.2ly: http://en.wikipedia.org/wiki/List_of_nearest_stars#List Milky way is 100,000 ly away : http://en.wikipedia.org/wiki/Milky_Way (see info bar on the right) . Note that the milky way is like a f ....

**Comment preview: **Time Dilation is super easy to understand if you think about the rule: The speed of light is always the same in every frame of reference. So imagine that you are measuring the speed of light while you are going 0.9c and it comes out as 299,792,458 m/s just ....

**Comment preview: **Ask him this: suppose your friend is in orbit around a black hole, and you are falling into it. From your friend's point of view, because of time dilation you never actually reach the black hole, and you just continue to be redshifted and approach its eve ....

**Comment preview: **In that case, we'll use the Sun's velocity of 220 km/sec through the Milky Way as the speed of the Earth relative to the Milky Way's rest frame. This is a fair approximation, since all of the velocities involved are small compared to c anyway, and because ....

**Comment preview: **I'm no expert in relativity but from my understanding of time dilation there wouldn't be a discontinuous point in which time would suddenly change, but there would be a gradient extending outwards from the center. I remember an example in one of Hawkings b ....

**Comment preview: **I like spatula's post. A lot of the comments, however, should be clarified. a) Gravitational time dilation is different from the time dilation in an inertial frame. The twin paradox helps understand why, and also helps to intuit the fact that time dilates ....

**Comment preview: **Context is good, but it's not really accurate to say the velocity composition formula is *because of* time dilation. If you want to derive the formula that way, time dilation is not enough: you need the effects of time dilation, length contraction, and rel ....

**Comment preview: **And the reason for all this time dilation is..... There is no absolute resting speed or center of the Universe. I can't say at any point that I am sitting still in the Universe and that you are floating through it at X miles per hour, you both could say th ....

**Comment preview: **In that case the time dilation effect of special relativity due to the speed of the ISS (which slows down time for the astronauts) outweighs the lower gravitational time dilation (which speeds up time for the astronauts). While the ISS seems high up to us ....

**Comment preview: **It is different depending on what point in the pregnancy it happens at. At my clinic we do procedures until around 22 weeks, so I'll try to give a breakdown of the basics. Medication abortion: different states have different laws, but the basics are a woma ....

**Comment preview: **I can t believe no one has been talking about time dilation. As you approach the speed of light time slows down, which at great enough speed would allow the observer moving close to the speed of light to see stars zoom by. Also to the observer there is no ....

**Comment preview: **I have to disagree with you on your first point. I don't think it necessarily means that Finn and Jake have merged with the alternate universe F&J. >An activated portal creates a time dilation in which either end of the portal experiences a tempora ....

**Comment preview: **This is Fermis paradox: If interstellar travel is possible and the universe is boiling with life... where is everybody? Surely some race out there has achieved the highest speed possible and has been able to do so for maybe billions of years. Where are the ....

**Comment preview: **You're always completely stationary from your own perspective. Mathematically, we write velocity as something called a "four vector." If you start with a standard position vector, it's just (x, y, z). To add a time component, we can't do (t, x, y, z) becau ....

**Comment preview: **Celestial velocities may be huge, but at least for orbits in the galaxy they top out at hundreds of kilometers per second. Since the speed of light is about 300,000 km/s, the stars' velocities relative to us introduce only a very very very miniscule change ....

**Comment preview: **Headache pain mostly is not like pain in other parts of the body. Some headache pain is from sore muscles. Most of it is from the arteries that supply the brain. The brain itself cannot sense pain - it has no nerve endings to detect pain - but many arte ....

**Comment preview: **Assuming Rek'sai's velocity is ~73.152m/s (estimated assuming the map is 325.12m long nexus to nexus, and that Rek'sai travelled .45 of the map to reach Gragas.), the time dilation can be determined. Assuming that Rek'sai's took 2 seconds to get to her tar ....

**Comment preview: **It doesn't really matter if you're going faster than light. If you're travelling at something close to the speed of light then the time dilation will be so great that it won't seem like it takes as long to go the same distance. For example, if we travel at ....

**Comment preview: **From one of my [previous responses](https://sciencequestionswithchris.wordpress.com/2013/04/30/what-would-happen-if-you-drove-your-car-close-to-the-speed-of-light-and-turned-on-the-headlights/) to this question: Light in vacuum always travels at the same s ....

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