What stops it from dropping downwards.If the energy from the big bang is keeping it moving in this direction, can we work out if we are slowing down or speeding up? Will we ever slow down? If i sound daft , maybe i am, but i find astronomy intresting.
2007-03-10 05:21:59 · 7 answers · asked by cheekychap432 1 in Science & Mathematics ➔ Astronomy & Space
The universe is a finite entity that contains everything we see.
The galaxies are spaced evenly on large scales.
The Hubble constant says the universe is in an accelerated expansion,but it can't be.
it is finite.
space must be in a state of diminishing density,this would produce a red shift that would appear to increase with distance.
Galaxies are probably end stage incidents in the evolution of a universe.
Some thing,not black holes must be powering the center of galaxies,probably some sort of neutron star activity.
I'll get back with more at a later date.
Think about it.
2007-03-10 09:26:53 · answer #1 · answered by Billy Butthead 7 · 0⤊ 0⤋
You've asked a very good question.
What keeps the galaxy where it is? Absolutely nothing. There's no down in space-yes, "up" and "down" are crucial to know where you are in space, but you can't say that you're going to fall "down" in space. Not gonna happen.
The "Big Bang" has a pretty misleading name. Space itself has been expanding since the beginning of time, and all the matter in the universe is merely along for the ride.
Yes, we can find out whether we're speeding up or slowing down, by observing the light from distant galaxies. Since some of them are millions of light-years away, and others tens of millions or even billions, we can determine how fast they were moving those millions or billions of years ago.
Our best evidence so far says that the galaxies are actually speeding up. This is probably because as the universe expands, the gravitational pull that Newton talked about-that all matter attracts other matter according to mass and distance-is weakening.
There's a lot of questions you've asked, all rolled up into one. I bet you could teach a week's worth of cosmology courses just by answering and elaborating on your questions.
2007-03-10 13:41:47 · answer #2 · answered by dark_load1 2 · 0⤊ 0⤋
There are also millions of galaxies in the universe and each galaxy has it own gravitation force which controls what happens to all the other galaxies. However the same theory of what keeps the planets hovering applies to the galaxies
2007-03-10 16:28:54 · answer #3 · answered by Paul E 1 · 0⤊ 0⤋
you sound really intrigued
the galaxies are constantly moving outward from the big bang's energy, and yes we can work out if we're speeding up etc... but it's going to take some time
and remember, there is no up or down in space. so what would pull it down?
2007-03-10 13:27:49 · answer #4 · answered by supervinny 2 · 0⤊ 0⤋
Our galaxy doesn't stay in the same place..! It's in constant motion towards a super-massive collection of distant galaxies. Our galaxy is moving in that direction at some 373 miles per second (..1.34-million mph..)
2007-03-10 14:08:29 · answer #5 · answered by Chug-a-Lug 7 · 0⤊ 0⤋
To your original question Same thing
P.S. your not daft, just thinking.
2007-03-10 13:25:50 · answer #6 · answered by occluderx 4 · 0⤊ 0⤋
There is no "down" in space.
Newton's first law of motion:
http://en.wikipedia.org/wiki/Newton%27s_Laws_of_Motion
2007-03-10 13:26:36 · answer #7 · answered by arbiter007 6 · 0⤊ 0⤋