Why Might The Universe Not Explode As It Grows? The real reason that the universe is expanding is that the objects in it are staying in one place — the same place they were when the Big Bang started — and the space between them is growing. … In other words, space is not just
Will Universe Ever Explode? If the Universe holds enough matter, including dark matter, the combined gravitational attraction of everything will gradually halt this expansion and precipitate the ultimate collapse. Over time, galaxies, then individual stars, will smash into each other more frequently, killing off any life on nearby planets. Will the universe eventually explode? Finally,
Are The Galaxies Moving Away From Each Other? The galaxies outside of our own are moving away from us, and the ones that are farthest away are moving the fastest. … However, the galaxies are not moving through space, they are moving in space, because space is also moving. In other words, the universe has
Can We Compress Space Time? The main idea here is that, although no material objects can travel faster than light, there is no known upper speed to the ability of spacetime itself to expand and contract. … The warp effect uses gravitational effects to compress the spacetime in front of a spacecraft, then expand the
What Type Of Universe Are We? Most astronomers believe that we live in a low-density Universe in which a mysterious substance known as ‘dark energy’ accounts for 70% of its content, and therefore, pervades everything. What is outside our universe? The universe, being all there is, is infinitely big and has no edge, so there’s
Can Tachyons Exist? Tachyons have never been found in experiments as real particles traveling through the vacuum, but we predict theoretically that tachyon-like objects exist as faster-than-light ‘quasiparticles’ moving through laser-like media. … “We are beginning an experiment at Berkeley to detect tachyon-like quasiparticles. Can tachyons escape a black hole? Since the disturbance of a
Is It Possible To Go Back In Time And Change The Past? Time travel is possible based on the laws of physics, according to new calculations from researchers at the University of Queensland. But time-travelers wouldn’t be able to alter the past in a measurable way, they say — the future would stay the same.
Who Found The Light Year? In 1838, the German astronomer Friedrich Wilhelm Bessel (and not the Scottish astronomer Thomas Henderson, as is often mentioned) was the first to use the light-year as a unit of measurement in astronomy. He measured the distance separating us from the binary star 61 Cygni as 10.3 light-years. What is
Who Said Everything Relative? A century ago, Albert Einstein taught us: everything is relative. The way you see the world depends on your point of view and context. Did Albert Einstein say everything is relative? In 1905, Albert Einstein based a new theory on two principles. … Everything is moving relative to everything else, hence
Who Said Time Absolute? They change depending on how fast you’re moving. But more importantly, Einstein also described several quantities related to space and time, which are absolute– the distance between two events in space time, the energy momentum of an object, and of course the speed of light. Who said time is not absolute?