Physics

[Saxe]

If the Earth's rotation around the sun in time is set at one year (365 days + 1 day every four years), and the earth's rotation around itself is set to 24 hours, are these time concepts done as statistics? Or to put it another way, is a day today as long as a day was 100 million years ago? We know that mass attracts mass and therefore should probably also assume that the earth is closer to the sun now than it was 100 million years ago, but does it have an impact on how long it takes for it to get around the sun?

[Saxe]

Yeah, I just researched a bit, and it seems that speed can cancel, or maybe a better word is equalize, pull from a mass, like say the Sun - like this:

 

But then I have another question, how about time being relative. That if you live on a mountain, times is slower than if you live at sea level. How can that be possible, and the same thing about speed, that the faster you travel, the slower the time passes by. Wouldn't there be a speed, from which you move back in time?

[Eldest]

It's tested that time passes slower on top of the mountain than it does at sea level, it's hardly noticeable but it has been tested with very accurate clocks

[Saxe]

It's tested that time passes slower on top of the mountain than it does at sea level, it's hardly noticeable but it has been tested with very accurate clocks

 

Lol, I hope I'll never get my hands on one of those damned inaccurate clocks

[Lux]

Obviously not noticable, or everything would move slower, right?? Or would time go slower, but movement would be the same. E.G you could run 100m in 7m on Everest, but 13 seconds below sea level (not that its like that, but if it was?)

[Saxe]

Hey, that reminded me of another question:

 

If humans ever invent some spaceship that'll get you out in space _REALLY FAST_, would it be possible to see the past on Earth? Like when we watch stars, we watch the light that they sent out millions of years ago, the same thing must apply to the Earth?

 

So if we fly one lightyear away from Earth in 1 hour, we see the light as seen on the Earth 1 year ago minus 1 hour? Can't we just travel 2000+ lightyears away from Earth and watch Jesus and such?

[Lux]

Hey, that reminded me of another question:

 

If humans ever invent some spaceship that'll get you out in space _REALLY FAST_, would it be possible to see the past on Earth? Like when we watch stars, we watch the light that they sent out millions of years ago, the same thing must apply to the Earth?

 

So if we fly one lightyear away from Earth in 1 hour, we see the light as seen on the Earth 1 year ago minus 1 hour? Can't we just travel 2000+ lightyears away from Earth and watch Jesus and such?

 

Yeah I guess so lol.

 

But how would you see Jesus from there??? You can barely see stars.

[Saxe]

Yeah I guess so lol.

 

But how would you see Jesus from there??? You can barely see stars.

 

By some kind of huge telescope or something - we'd figure something out ;D

[Omar]

Hmm... Never thought of it that way.

[Wrathek]

i didn't either, because what he's suggesting would break physics. He's saying that it would be conceivable that one day we can make objects of matter that can travel not only faster than the speed of light, but several times faster.