The keel has been covered with dust and chalk dust, and the rumor is only true.
A lifetime of mistakes, the background microwave heartless.
Ripple space-time theory is relative. Is there a new god after the robbery?
The universe is full of dark energy and dark matter (dark matter accounts for 85% of all cosmic matter).
The Milky Way is a flat disk with a width of about 654.38+0.3 million light years and a center thickness of about 2000 light years. On the edge of this disk, the solar system "revolves" around the Milky Way, once every 250 million years. This revolution is accompanied by ups and downs, crossing the disk of the Milky Way every 30 million years.
The problem is that the disk of the Milky Way galaxy may also be an area where dark matter gathers. Although dark matter does not often interact with ordinary matter, even if it passes through it, life on earth may be ignorant, but the gravitational effect of dark matter on the solar system and the earth cannot be ignored. Therefore, dark matter that passes through the Milky Way every 30 million years is likely to pull comets and asteroids at the edge of the solar system into the interior of the solar system and eventually hit the earth due to gravity. Not only that, when dark matter passes through the core region of the earth, gravity will directly act on the earth, greatly raising the temperature inside the earth, which will lead to more violent and frequent volcanic eruptions, magnetic pole reversal and sea level rise-all these factors together are enough to cause the periodic extinction of life on earth. There have been five mass extinctions on the earth, the most recent one being the Jurassic dinosaurs and three-quarters of life on the earth 66 million years ago.
Einstein once said that the biggest mistake he made in his life was to add a "cosmological constant" to the equation of general relativity, that is, an unknown cosmological energy he imagined. But American astronomers say that Einstein was right according to the observations of the Hubble Space Telescope. There is indeed a mysterious force in the universe that scientists call "dark energy", which is accelerating the expansion of the universe.
Cosmic microwave background radiation is the oldest light in the universe. According to the Big Bang theory, about 65.438+0.4 billion years ago (there are different opinions about the age of the universe), at the beginning of the formation of the universe, dense matter confined all radiation like a cage, and 300,000 years after the Big Bang, with the decrease of the density of these substances, microwave background radiation was freed. Just as dinosaur fossils can let us know dinosaurs tens of thousands of years ago, this kind of "fossil" light can travel unimpeded in the vast universe, letting us know all kinds of information about the "infancy" of the universe.
Generally speaking, the ripples of time and space are similar to those of water, but the ripples of time and space mean that time and space should be curved. To stir up ripples on the water surface, it is necessary to have a trigger, both in time and space, and a series of changes or reflections caused by an inducing factor. These factors can be many, such as black holes, violent collisions between massive celestial bodies, as small as some tiny strange particles such as a small group of strange quarks and so on.
According to the admonition of general relativity, gravitational waves should be everywhere. From the collapse and explosion of massive stars into supernovae, to the gradual approach and merger of neutron stars and black holes, and to the violent fluctuation of space and time shortly after the Big Bang, many explosion events in the universe should produce gravitational waves that travel at the speed of light.
A theory called "the end of the Higgs boson" says that when quantum waves form vacuum "bubbles" in space, they will spread in space and destroy the whole universe. Nevertheless, scientists don't think this will happen in the short term.