Aces High Bulletin Board
General Forums => The O' Club => Topic started by: Karnak on March 25, 2014, 05:36:12 PM
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Neat artistic rendering of the coming collision between the Andromeda and Milky Way galaxies as seen from earth 3.5-4 billion years from now.
(http://www.nasa.gov/images/content/654291main_p1220bk.jpg)
http://www.nasa.gov/mission_pages/hubble/science/milky-way-collide.html
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Freeze me now so I can see it! (Even though the actual collision would take countless years).
I want to watch fast galactic destruction dangit!!
Taking bets now that the Milky Way can take Andromeda! Get your money in now! PM me... :noid
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Milky Way is #1!
Andromeda sucks!
Is there a bracket for this match?
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Milky Way is #1!
Andromeda sucks!
Is there a bracket for this match?
Only of Reeses PB cups will sponsor it
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It's closer than you think the light we see now came from Andromeda how many years ago? :headscratch:
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It's closer than you think the light we see now came from Andromeda how many years ago? :headscratch:
Unaided viewing would be around 2.5 million years. Drop in the bucket in the overall timeline.
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Unaided viewing would be around 2.5 million years. Drop in the bucket in the overall timeline.
That means it's much closer than we are seeing it folks! :noid
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Unaided viewing would be around 2.5 million years. Drop in the bucket in the overall timeline.
That means it's much closer than we are seeing it folks! :noid
Not all that much. Considering the collision won't really get going until about 3.85 billion years from now, 2.5 million years is a relative pittance.
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Sods law that the only galaxy with confirmed life (as far as we know) is most definitely going to be extinguished, and most likely by the 4th artist picture. :old:
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Sods law that the only galaxy with confirmed life (as far as we know) is most definitely going to be extinguished, and most likely by the 4th artist picture. :old:
No, not extinguished. Merged. The Milky Way and Andromeda will ultimately form a single, larger galaxy.
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There isn't really an impending collision. The 2 galaxies will merge, change shape, trade mass back and forth and possibly then form one larger galaxy. But objects in those galaxies will not actually be impacting each other. There are billions of miles of space between the objects in each galaxy making collisions between stars and planets highly unlikely.
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How about when the supermassive black hole at the center of each galaxy gravitationally lock onto each other? Will they merge into a single entity and swallow up everything, or will they orbit each other at FTL speeds and fling all the stars out into the Great Void?
How does one go about adding galaxy collision coverage to one's homeowner's policy? :neener:
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I'll be happy to sell you 'galaxy collision' coverage for everything you own. :)
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I'll be happy to sell you 'galaxy collision' coverage for everything you own. :)
:rofl :rofl :rofl
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Is this going to be anything like the collision code in AH. :neener:
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Is this going to be anything like the collision code in AH. :neener:
You owe me a coke...
:rofl
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Is this going to be anything like the collision code in AH. :neener:
What? You hoping the other planet takes all the damage as we orbit away?
Pretty sure the reality is going to be the same for both planets, unlike AH.
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Pretty sure the reality is going to be the same for both planets, unlike AH.
QFT! :noid
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I'll be happy to sell you 'galaxy collision' coverage for everything you own. :)
proof that skuzzy does have a sense of humor :rofl :rofl :rofl :rofl :rofl :rofl :rofl.
semp
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The collision may bring a black hole nearby earth. Just a curious thought - if the black hole starts to suck earth in it and the gravity accelerates the earth to huge speed, it would probably feel like it's going to take an eternity to be sucked in because time slows down as speed increases. So the outside world would see the earth and the sun get sucked in the black hole at huge increasing speed and people on earth would be like 'meh'.
Also, does anyone know what is the actual speed of earth, the sun and the galaxy? If and when time is relative to the speed, what is actual time and what is our actual speed related to the center of the universe? The question arises what happens to time in the dead center of universe if an object sits still, is the time much faster there than it is in post big bang objects which hurl away? Could the measured speeding up of the expansion of the universe be explained by us actually slowing down so that time seems to flow faster for us and therefor objects seem to distance faster? Inquiring minds want to know :devil
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The collision may bring a black hole nearby earth. Just a curious thought - if the black hole starts to suck earth in it and the gravity accelerates the earth to huge speed, it would probably feel like it's going to take an eternity to be sucked in because time slows down as speed increases. So the outside world would see the earth and the sun get sucked in the black hole at huge increasing speed and people on earth would be like 'meh'.
Also, does anyone know what is the actual speed of earth, the sun and the galaxy? If and when time is relative to the speed, what is actual time and what is our actual speed related to the center of the universe? The question arises what happens to time in the dead center of universe if an object sits still, is the time much faster there than it is in post big bang objects which hurl away? Could the measured speeding up of the expansion of the universe be explained by us actually slowing down so that time seems to flow faster for us and therefor objects seem to distance faster? Inquiring minds want to know :devil
Okay, here we go.
The speed of the Earth's orbit around the Sun: 18.64 miles/second (30 km/s)
Our Solar System is moving around the Milky Way Galaxy at about: 155.34 miles/second (250 km/s)
Our Milky Way Galaxy is moving in the local group at about : 186.41 miles/second (300 km/s)
That should cover it. Just note all the speeds are constantly changing. My speeds are going to be fast as it has been a while since I kept up with them.
Oh, our Solar System is moving upwards 90 degrees to the plane of the Milky Way as well. About 4 miles/second.
Eventually, if all theories hold, we will stop and reverse directions picking up speed as we head to the next 'big bang'.
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Isn't time relative to the observer?
As a ship falls towards a black hole, time for those on the ship moves normally. But to an outside observer, as that ship moves closer to the black hole it seems to get slower and slower until it stops.
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Okay, here we go.
The speed of the Earth's orbit around the Sun: 18.64 miles/second (30 km/s)
Our Solar System is moving around the Milky Way Galaxy at about: 155.34 miles/second (250 km/s)
Our Milky Way Galaxy is moving in the local group at about : 186.41 miles/second (300 km/s)
That should cover it. Just note all the speeds are constantly changing. My speeds are going to be fast as it has been a while since I kept up with them.
Oh, our Solar System is moving upwards 90 degrees to the plane of the Milky Way as well. About 4 miles/second.
Eventually, if all theories hold, we will stop and reverse directions picking up speed as we head to the next 'big bang'.
Thought the latest science showed that space is expanding at an accelerating rate........... :bolt:
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Thought the latest science showed that space is expanding at an accelerating rate........... :bolt:
The expansion rate is a different speed set.
You have to remember, speed is always relative to something. What I was tossing out is the speed of Earth, from various points (our Sun, the Milky Way, and the local group).
Expansion speed will depend on what points are being used to calculate the numbers.
Really is some neat stuff to track.
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(http://d1jqu7g1y74ds1.cloudfront.net/wp-content/uploads/2013/12/tumblr_mj0vvcqnZx1qdlh1io1_400.gif)
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Isn't time relative to the observer?
As a ship falls towards a black hole, time for those on the ship moves normally. But to an outside observer, as that ship moves closer to the black hole it seems to get slower and slower until it stops.
That is correct.
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Isn't time relative to the observer?
As a ship falls towards a black hole, time for those on the ship moves normally. But to an outside observer, as that ship moves closer to the black hole it seems to get slower and slower until it stops.
It should be exactly the opposite. If you travel at light speed and return back you have aged 2 weeks but outsiders have aged 20 years. So if you get sucked to event horizon and you speed up insanely, your time slows down and you would see outside events moving extremely fast. But the event horizon causes time to slow down also for sheer gravity not just speed.
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That is correct.
This can't be correct because if it was there would be a huge bunch of objects entering the event horizon of every black hole. Instead they get sucked in and get turned into hawkings radiation.
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Too high a deflection shot for a successful merge.
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It should be exactly the opposite. If you travel at light speed and return back you have aged 2 weeks but outsiders have aged 20 years. So if you get sucked to event horizon and you speed up insanely, your time slows down and you would see outside events moving extremely fast. But the event horizon causes time to slow down also for sheer gravity not just speed.
how again are you time traveling? i have yet to figure out how speed effects time? light speed + return at light speed = 2 weeks...so...2 weeks = 20 years?
How can mix perception and event horizons? a human could never survive those extremes.
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The person traveling at high speeds does not perceive...........oh nevermind, you guys aren't going to get it.
Read Stephen Hawking's "A Brief History of Time" and then get back to me.
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so if a rock is a human ... and a human keeps track of time...time is.....
A Witch!
(http://assets.sbnation.com/assets/573638/burn_them.jpg)
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So in that theory, time weighs the same as a duck
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how again are you time traveling? i have yet to figure out how speed effects time? light speed + return at light speed = 2 weeks...so...2 weeks = 20 years?
How can mix perception and event horizons? a human could never survive those extremes.
Theoretical questions do not have to worry about details such as would you survive or not. Time travel is not possible just by speeding up, you can only slow down your perceived time like that. In order to time travel you'd need to have a worm hole with the other end spinning rapidly. The effects of the environment would cause anyone entering the other end of the wormhole arrive to the other side faster than he enters it.
The practical problem with time machines is that you can only travel as far back in time as when the time machine was created.
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Theoretical questions do not have to worry about details such as would you survive or not. Time travel is not possible just by speeding up, you can only slow down your perceived time like that. In order to time travel you'd need to have a worm hole with the other end spinning rapidly. The effects of the environment would cause anyone entering the other end of the wormhole arrive to the other side faster than he enters it.
The practical problem with time machines is that you can only travel as far back in time as when the time machine was created.
It would seem the fundamental problem is that the nature of time is a non physical constant linear progression independent of perception. Also, speed is a measurement of distance over time, without time there is no measurement of speed.
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Eventually, if all theories hold, we will stop and reverse directions picking up speed as we head to the next 'big bang'.
This appears to not be the case. The rate of expansion is speeding up and we don't know why. 'Dark Energy' is somehow causing the expansion to accelerate when by what we know it ought to be slowing down.
http://www.youtube.com/watch?v=L7KHjkooegc
http://www.youtube.com/watch?v=EZ0vV8SN7_8
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Isn't time relative to Einsteins relativity theory.
According to these theories, the concept of time depends on the spatial reference frame of the observer, and the human perception as well as the measurement by instruments such as clocks are different for observers in relative motion. For example, if a spaceship carrying a clock flies through space at (very nearly) the speed of light, its crew does not notice a change in the speed of time on board their vessel because everything traveling at the same speed slows down at the same rate (including the clock, the crew's thought processes, and the functions of their bodies). However, to a stationary observer watching the spaceship fly by, the spaceship appears flattened in the direction it is traveling and the clock on board the spaceship appears to move very slowly. On the other hand, the crew on board the spaceship also perceives the observer as slowed down and flattened along the spaceship's direction of travel, because both are moving at very nearly the speed of light relative to each other. Because the outside universe appears flattened to the spaceship, the crew perceives themselves as quickly traveling between regions of space that (to the stationary observer) are many light years apart. This is reconciled by the fact that the crew's perception of time is different from the stationary observer's; what seems like seconds to the crew might be hundreds of years to the stationary observer. In either case, however, causality remains unchanged: the past is the set of events that can send light signals to an entity and the future is the set of events to which an entity can send light signal
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The universe is "open", which means it'll expand forever, instead of closed, which would result in another big bang. Although we're probably part of the Shapley Supercluster (http://en.wikipedia.org/wiki/Shapley_Supercluster), which means that even when the rest of the universe has expanded so much its no longer observable, we'll still have a lot of galaxies that are more or less permanently in our neighborhood, which is oddly comforting.
The best thing about this galaxy collision is the scene at the end of Empire Strikes Back, where Luke and Leia look out the window of their Nebulon B Medical Frigate at their galaxy... imagine seeing that every night you go outside and look at the sky... awesome!
As for our speed moving through the universe, this seems like a good estimation: http://www.astrosociety.org/edu/publications/tnl/71/howfast.html
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So in that theory, time weighs the same as a duck
Time turned me into a newt!
I got better.
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the past is the set of events that can send light signals to an entity and the future is the set of events to which an entity can send light signal
the past is how space got to its current position. the time is now. the future is where space will be. :old:
interesting ideas... another is gravity and black holes and light. if the speed of light is the speed of electromagnetism and if light can not escape a black hole. is the speed of gravity greater than the speed of light? or is gravity also the speed of light. :noid everything is the speed of light AHHHH :noid