Does the universe’s expansion result in larger galaxies?
Similar to pennies, galaxies do not expand; rather, it is the space between the pennies that is growing. Even we, as well as individual galaxies, stars, and planets, are not expanding because they are held together by gravity or other forces. There is nothing to expand into because the universe already contains everything. Just growing, that is. Every region of space in the universe is being stretched and every galaxy is moving away from one another, but there is neither a center from which they are expanding nor anything for their outer edges to do the same.The distance between galaxies and the expanding universe causes the apparent velocity of the farther away galaxies to appear to be greater. The fact that all galaxies appear to be revolving away from us does not make the Earth or the Milky Way unique in this regard.However, the Andromeda galaxy is a completely distinct galaxy that is even larger than our Milky Way. It is visible in the sky as a large smudge of distant light that is larger than a full moon in a dark sky. View the EarthSky Community Photos.There are galaxies that resemble jellyfish, galaxies that eat other galaxies, and galaxies that appear to lack the dark matter that permeates the rest of the universe beyond our Milky Way. Here are some of the most unusual galaxies in the universe.However, the Andromeda galaxy is a completely distinct galaxy that is even larger than the Milky Way. You can see that it is large on the sky as well, a smudge of distant light larger than a full moon, in a dark sky. View the EarthSky Community Photos.
What happens when the universe has finished growing?
The cosmos will smash into itself in a Big Crunch if gravity triumphs over expansion. We will experience a Big Freeze if the universe expands forever, as is predicted. But if dark energy accelerates the rate of expansion to almost infinity, a Big Rip will occur, tearing everything—including atoms—apart. Due to the Big Bang and the dark energy’s acceleration, space is expanding. However, the size of celestial objects such as planets, stars, and galaxies does not change. Galaxies are pushed apart from one another as space expands.
Will the universe begin to contract?
The Big Crunch and Big Bang that follow the collision are analogous. Quantum fluctuations from a time before branes are present in the matter and radiation that surround us today. The universe reached its current state after a number of billion years, and after another number of billion years it will begin to contract. According to stoic physics, the universe periodically explodes in a massive conflagration (ekpyrosis) and then rebirths (palingenesis). Every cycle in these cycles exactly repeats the previous one, and they go on forever.According to one new cosmology, there is an approximately trillion-year-long UNIVERSAL CYCLE of birth and rebirth. Two 10-dimensional branes collide (1), expand (2), and then collide again (4) to produce big bangs. In this hypothetical situation, the universe we live in (3) is merely one cycle in an endless series.
How do galaxies grow to be so big?
According to astronomers’ theories, young galaxies gradually grew larger and more massive as a result of their constant star formation and interactions with nearby galaxies, which resulted in the formation of new, larger galaxies. Practically speaking, we are incapable of contemplating the end of space. The space between the multiverses is a void. The distance covered by our universe alone in a single second is billions of kilometers, and it is expanding in all directions. Such universes exist in an infinitely large space and have no beginning or end.The size of our home galaxy was significantly smaller than it is now, according to astronomers, when it first formed more than 13 billion years ago. We can probably thank eons of galactic cannibalism for how it grew so much to reach its present size.A hypothetical collection of various universes is known as the multiverse. All of space, time, matter, energy, information, and the physical laws and constants that describe them are thought to be contained in these universes collectively.Exactly how galaxies formed is a mystery to astronomers. Space was largely composed of hydrogen and helium after the Big Bang. According to some astronomers, gravity caused gas and dust to gather into individual stars, and those stars then drew together into clusters to form galaxies.Cosmos is another name for our universe. Greek is where the word’s origins lie. It was once believed that the universe was nothing more than our galaxy.
Is the Milky Way growing or contracting?
But as stars form on the galactic periphery, our research demonstrates that it is slowly growing in size, at least in the visible region. The following are listed in order of size: the universe, galaxy, solar system, star, planet, moon, and asteroid.Jupiter is the solar system’s largest planet by a considerable margin; its mass is more than twice that of all the other planets put together. Jupiter is the latest fifth object in the solar system from the Sun.The total number of planets in the universe, each of which has its own solar system and galaxy, is approximately 10,000,000,000,000,000,000,000,000, if you like big numbers.