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Physics is kinda cool - mind trip/stoner thought (pg. 2)
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| Halcyon+On+On |
Hm, first one wouldn't quite work, I don't think. For you to discern any sort of detail, you would have to get close enough to actually SEE what's going on (through the use of this "super telescope"). By the way that light works, the closer you got, the more relative towards the specific inertial reference frame you would come, so if you actually had a vision which was able to see Earth as it is, the light you would be collecting through your eye (that's how you see things, is reflection) would register in that specific point on the time-space continuum. Therefore, you could not see back in time, and look at all the little details of what happened. But it is true that the light you see from stars is millions of years old - but that's only relative to your location on Earth in accordance to the specific inertial reference frame as defined by your exact position along the space-time continuum. If a bigger fish would like to tell me I'm a dumbass, feel free to do so - I'd rather learn more about this more than anything else. :D
Scientists do believe however, that a distant star in the Milky Way Galaxy went Supernova a few hunderd thousand years ago. So about any time between now and 2100, we could get a VERY bright show in the sky that could last a few weeks. They predict that it will be brighter than the moon at night. :D
However, this sort of chaotic randomness creates its problems for us. Though we believe that there are not any stars close enough to Earth that are in danger of going Supernova (therefore destroying this planet), there is always the danger of two black holes merging. Because of the nature of these things, and the relatively low budget NASA gets (some people would rather spend money in Iraq :rolleyes: ) We can't look at everything we would like to. This arises the possibility of two black holes merging, which, although it creates a wormhole (theoretically), it also emits what is called a Gamma Ray Burst. That would kill every living thing on Earth in under 12 seconds if it hit us at all.
Just goes to show - we're not . :haha: |
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| Lira |
| quote: | Originally posted by Exodus17
When you look at a distant star or planet, you are looking back in time, according to the whole speed of light theory thing, it takes light a longass time to travel through space even at it's uber speeds... so the light emitted from a lit up star or planet takes forever to reach your eye - my friend then asks: imagine if you were on a faraway planet and you had like super telescopes and you were looking at earth... because of the whole light/time thing you would be looking back into earths past while in reality, here on earth we'd actually be years and years ahead of what you see from the distant planet.... so his question was.... if we were on a distant planet right now, do you think we'd be able to look at earth and see WWII, or maybe even farther back into the days of the Roman Empire, or the Egyptians... or even see the dinosaurs?. |
It naturally depends on how far the star/planet is. In order to see WWII, the planet would need to be 62 light-years away (is this the proper name?). In order to see the dinassaurs, it would have to be far, far, more than far away.
(You'd need an incredibly precise telescope to see a simple house, for that matter). |
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| nchs09 |
| quote: | Originally posted by BeatFreak
That first one is pretty cool.
But what about this one? You know how people say they see UFO's and little aliens with big heads and eyes and small bodies?
What if those aren't UFO's but they are actually humans from the way distant future who have evolved into that traveling back in time to see us? Huh? huh? well? That'd be crazy. |
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| Phil raa |
| quote: | Originally posted by Halcyon+On+On
more relative towards the specific inertial reference frame
*snip*
(therefore destroying this planet) |
i love you.
can i use that in my sig? :toothless |
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| Sunsnail |
| Black holes are seriously awesome :eyespop: |
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| mezzir |
thit thread rules
even if its not scientifically correct, that first thought was the coolest thing i've heard in a while:wtf: |
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| mto |
| Yeah quit smokin' for real :) |
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| vswede |
| stop thinking and start drinking it doesnt matter you wont get there in the end :P |
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| Boomer187 |
haha, i didn't really think I knew too much about physics and stuff, but from reading these replies, I think I do. of course if you were hypothetically on a place that is light years away and you had a hypothetical devise to view the earth, you would see the past. that is only because we define time through relative experiences.
if you wanna know another 'mind blower' (this one shut a stoner up one night so I could sleep, he kept trying to talk..judas)....when you look at stars, that is not really where they are. As the light from each star travels through space it is pulled and pushed by the gravity of stars it is passing by. so it refracts the light making it appear in a different location.
and ther is no sound in teh space...z0mgz0rz |
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| cviper |
| quote: | Originally posted by Halcyon+On+On
However, this sort of chaotic randomness creates its problems for us. Though we believe that there are not any stars close enough to Earth that are in danger of going Supernova (therefore destroying this planet), there is always the danger of two black holes merging. Because of the nature of these things, and the relatively low budget NASA gets (some people would rather spend money in Iraq :rolleyes: ) We can't look at everything we would like to. This arises the possibility of two black holes merging, which, although it creates a wormhole (theoretically), it also emits what is called a Gamma Ray Burst. That would kill every living thing on Earth in under 12 seconds if it hit us at all.
Just goes to show - we're not . :haha: |
Sorry for being sceptical to that, but
a) gamma ray bursts are quite common. Although a single burst is extremly powerful we won't notice much due to the distances involved (a huge burst measured on 27. december emited more energy than the sun does in 150'000 years, see here ). And where do those 12 seconds come from :conf:
b) AFAIK it's not quite incommon for black holes to collide (at least if you move towards the center of the galaxy). On the other hand, I'm quite sure that, what people think are stars "colliding" with black holes, have been observed. |
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| KilldaDJ |
| drugs are cool, they make you hungry and like music |
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