The technology required to travel between galaxies is far beyond humanity's present capabilities, and currently only the subject of speculation, hypothesis, and science fiction. However, theoretically speaking, there is nothing to conclusively indicate that intergalactic travel is impossible.
Even traveling at the speed of light, it would take nearly a hundred thousand years!
In the short term, no, nothing bad will happen. The Milky Way is not particularly important to us in terms of keeping the solar system together, protecting us from anything dangerous, and so on.
Our Milky Way galaxy is destined to collide with our closest large neighbour, the Andromeda galaxy, in about five billion years.
Now the Andromeda galaxy can be seen with the naked eye, like a tiny dot in the sky. But in three billion years it will be so clearly visible to the naked eye that it will even be possible to see individual spiral arms in it.
Our Milky Way will have lost its identity long ago through merging with the Andromeda galaxy, M31. The resulting giant elliptical galaxy will be devoid of dust and gas. The night sky will be a largely homogeneous sprinkling of stars. Stellar density will concentrate toward the galactic core.
Intergalactic distances are roughly a hundred-thousandfold (five orders of magnitude) greater than their interstellar counterparts. The technology required to travel between galaxies is far beyond humanity's present capabilities, and currently only the subject of speculation, hypothesis, and science fiction.
Our Milky Way galaxy will likely collide with the neighboring Andromeda galaxy four billion years from now. Our Sun will fling into a new region of our galaxy, but our Earth and solar system are in no danger of being destroyed.
Fortunately, this has never happened to anyone — black holes are too far away to pull in any matter from our solar system.
Because space isn't curved they will never meet or drift away from each other. A flat universe could be infinite: imagine a 2D piece of paper that stretches out forever. But it could also be finite: imagine taking a piece of paper, making a cylinder and joining the ends to make a torus (doughnut) shape.
The trite answer is that both space and time were created at the big bang about 14 billion years ago, so there is nothing beyond the universe. However, much of the universe exists beyond the observable universe, which is maybe about 90 billion light years across.
To reach M31, the Andromeda galaxy, in a human lifetime would require a velocity of 0.99999 c. Behind the relativistic spacecraft on Earth, millions of years would have passed, but the same crew that departed would reach their destination.
Near a black hole, the slowing of time is extreme. From the viewpoint of an observer outside the black hole, time stops. For example, an object falling into the hole would appear frozen in time at the edge of the hole.
This potential supermassive black hole, weighing as much as 20 million Suns, has left behind a never-before-seen 200,000 light-year-long trail of newborn stars. The streamer is twice the diameter of our Milky Way galaxy.
It seems unlikely." The black hole hypothesis is a lot cleaner, if mind-bendingly hard to picture. We might live in a universe within a black hole within a universe within a black hole. It might just be black holes all the way down.
Ask Astro: What would the Milky Way look like from the Andromeda Galaxy? As it turns out, any inhabitants within the Andromeda Galaxy likely get a view of the Milky Way similar to the one we have of their galaxy. Q: From our perspective in the Milky Way, we see the Andromeda Galaxy almost — but not quite — edge on.
But the Andromeda galaxy is a whole separate galaxy, even bigger than our Milky Way. In a dark sky, you can see that it's big on the sky as well, a smudge of distant light larger than a full moon.
Earth is approximately 4.5 billion years old, which means it has lived through about 20 complete loops around the galaxy.
For most space objects, we use light-years to describe their distance. A light-year is the distance light travels in one Earth year. One light-year is about 6 trillion miles (9 trillion km). That is a 6 with 12 zeros behind it!
Nothing can travel faster than 300,000 kilometers per second (186,000 miles per second). Only massless particles, including photons, which make up light, can travel at that speed. It's impossible to accelerate any material object up to the speed of light because it would take an infinite amount of energy to do so.
All that we're looking forward to viewing is based on light that was already emitted many billions of years ago: close to the Big Bang in time. As it stands today, even if we left right now at the speed of light, we wouldn't be able to reach nearly all of the galaxies throughout space.
By 1014 (100 trillion) years from now, star formation will end, leaving all stellar objects in the form of degenerate remnants. If protons do not decay, stellar-mass objects will disappear more slowly, making this era last longer.
Typically, they shouldn't be able to merge easily. Once black holes get fairly close together in binary pairs, they can settle into fairly stable orbits with each other. The situation changes, however, if they're dancing together in a crowded environment.
In about one billion years, the solar luminosity will be 10% higher, causing the atmosphere to become a "moist greenhouse", resulting in a runaway evaporation of the oceans. As a likely consequence, plate tectonics and the entire carbon cycle will end.
on edge of Black Hole. Space and time are intertwined, called space-time, and gravity has the ability to stretch space-time. Objects with a large mass will be able to stretch space-time to the point where our perception of it changes, known as time dilation.