Okay if we ever reach to the edge of the universe, the sight there would be mesmerizing and catastrophic. As we all know that the universe is still expanding, that means the universe is still growing in all the directions. So the edge of the universe will be nothing but BIG BANG.
It’s theoretically impossible to reach the edge of the universe because it’s expanding faster than the speed of light. The universe is expanding due to the expansion of space between matter
Scientists believe it’s unlikely the universe has an end. They think space spreads out infinitely in all directions, and galaxies fill all of the space.
However, the accelerated expansion of the universe makes it physically impossible to reach the edge of the observable universe. At most, we can only get a third of the way there
According to the Discovery Channel, the universe is everything, so it’s not expanding into anything. There’s no center from which the universe is expanding, and there’s no outer edge for it to expand into
Some hypotheses about what’s outside the universe include:
- Higher dimensional space-time universe: This universe is higher dimensional, so it’s not visible, detectable, or comprehensible.
- Black hole: We might be trapped inside a black hole of a larger universe.
NASA says the universe will eventually stop expanding and collapse in on itself, which is called the “Big Crunch”
The universe doesn’t have a physical boundary. It’s not like a bubble expanding into a preexisting volume. The universe is everywhere and is roughly the same everywhere.
The universe is expanding forever. The prevailing theory is that the universe will cool down as it expands, eventually becoming too cold to support life. This future scenario is now known as the “Big Chill” or “Big Freeze
The universe is expanding into itself. It’s not expanding into anything because it’s everything. The universe’s expansion is an increase in the distance between gravitationally unbound parts of the observable universe
The expansion of the universe doesn’t affect the relative position of astronomical bodies within galaxies. For example, the expansion of the universe doesn’t change the distance between the Earth and the Sun.
The expansion of the universe is accelerated by dark energy. Dark energy is the energy of space itself. About 68% of the universe is dark energy
Yes, the universe is constantly expanding. The expansion rate is decreasing, but it’s not dropping to zero. The expansion rate is asymptotically approaching a final value that’s about 30% lower than its current value
The universe has been expanding since the Big Bang. The expansion is uniform in all directions. The more distant a galaxy is from us, the faster it appears to be receding into space.
The expansion of the universe causes light to stretch to longer wavelengths. This is called redshift. The more space there is between us and a distant galaxy, the greater the redshift.
There are several ways that scientists know the universe is expanding:
- Redshift Light from distant galaxies is stretched towards the red end of the spectrum. This is called redshift. Distant galaxies have a higher redshift than galaxies that are closer to Earth.
- Hubble’s Law The farther away a galaxy is, the faster it is receding. This relationship is known as Hubble’s Law.
- Cosmic background radiation The amount of cosmic background radiation left over from the Big Bang.
- Element types and amounts The types and amounts of elements in the universe are almost exactly the amounts predicted by the Big Bang Theory.
Edwin Hubble provided the first observational evidence for the universe’s expansion in 1929. He discovered that galaxies are moving away from one another with speeds proportional to their distance. The ratio of a galaxy’s velocity to its distance is known as the Hubble constant. It represents the expansion rate of the universe
Albert Einstein didn’t predict the expanding universe. In fact, he rejected the idea of an expanding universe in favor of the accepted view that the universe was stationary.
Einstein’s theory of relativity implied that the universe must either be expanding or contracting. However, when his equations seemed to suggest that the universe was expanding, he added a quantity known as the cosmological constant to restore a static universe.
Einstein eventually accepted the modern cosmological view that the universe is expanding. After Edwin Hubble confirmed that the universe was expanding, Einstein abandoned his cosmological constant.
Edwin Hubble, an American astronomer at Caltech, was the first to prove that the universe is expanding. In 1929, he published a paper in PNAS that described the relationship between the distance of galaxies and their recession velocity. This relationship is now known as Hubble’s Law.
Hubble’s discovery showed that galaxies are moving away from one another, with the more distant galaxies receding faster. He also observed that the red shift of galaxies was directly proportional to their distance from Earth.
Hubble’s discovery led to the conclusion that the universe was not static, but was expanding. This discovery also suggested that the universe was born in a Big Bang.
The Hubble Space Telescope is named after Edwin Hubble
The universe is expanding at a rate of 66–74 kilometers per second per megaparsec. A megaparsec is 3.3 million light years, or 3 billion trillion kilometers
The expansion of the universe makes the observable universe and the whole universe bigger. For example, galaxies appear to be moving 74 kilometers per second faster for every 3.3 million light-years farther away they are from Earth.
There is no limit on how fast space can expand. Changes in the size or shape of space occur because of the movement of matter and energy in the universe.
Matter is a fixed amount of stuff that lives in space. As the universe expands, the amount of space for matter to live in increases, but the total amount of matter remains the same
The expansion of the universe only has an effect where another force hasn’t overcome it. For example, objects held together by gravity or other forces, like galaxies, stars, planets, and humans, are not expanding
The universe’s expansion is not happening at a single point, but rather is taking place everywhere. The expansion of the universe is not violating Einstein’s theory of relativity, which states that nothing can travel faster than light( full article source google)
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Universe discoveries 