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The Universe is so big because it is constantly expanding, and it does so at a speed that even exceeds the speed of light. Space itself is actually growing, and this is going on for around 14 billion years or so. In this amount of time, with speed greater than the speed of light, the Universe gradually grew, and it still expands even to this day.
This was prior to the Big Bang which in truth was more of an inflation outwards. Around 13.8 billion years ago it is thought that the universe began to expand outward from this dense mass. The universe is thought to have expanded faster than the speed of light for a fraction of a second. This is a theoretical period known as cosmic inflation.
The universe’s density is equivalent to 5 protons per cubic meter of space. The universe is made up of 4.9% ordinary (baryonic) matter, 26.8% dark matter, and 68.3% dark energy. Considering only the largest structures, the universe is made up of filaments, voids, superclusters, and galaxy groups, and clusters.
The naming of the Big Bang theory happened randomly during a radio broadcast in 1949 when astronomer Fred Hoyle, creator of the Steady State theory, referred to Lemaitre’s theory as the “big bang idea.”. Though we have an understanding of how the Universe began, we don’t know its exact shape.
But just how big is the Earth? The Earth has a radius of 2.439 kilometers / 1.516 miles and a diameter of only 12.742 km / 7.917 mi. When it comes to weight, the mass of Earth is equivalent to 5.9 quadrillion kg. In the Solar System, our Earth is the fifth largest planet and the largest of the terrestrial planets.
How Big is Betelgeuse Compared to the Sun? Betelgeuse , like the other stars mentioned above, is among the biggest stars in our Universe that we know of at least. This supergiant red star has between 950 and 1,200 solar radii, or it has between 95.000% and 120.000% of our Sun’s radius.
Key to the idea of the Big Bang is an understanding that the universe is gradually expanding. In 1912 observations by Vesto M. Slipher indicated redshifting of the light from remote galaxies. This led to the theory that the galaxies may be receding from the earth or basically moving further away. A decade later using Einstein’s field ...
The largest star we have identified is UY Scuti, which was found in 2012. Its radius is in between 1,054,378,000 and 1,321,450,000 miles, which is about 1700 times larger than the radius of Sun. If you replaced our Sun with UY Scuti, the star would go beyond the orbit of Juptier, consuming all the first five planets, and drawing all the ...
The Earth is estimated to be 4.54 billion years old, so the Universe itself is, on average, around three times older than our Earth but only if the Universe is indeed 13.8 billion years old. Our galaxy, the Milky Way, might be a better comparison, as it is 13.51 billion years old.
Scientists explain the that universe began with a the Big Bang. During this cosmic event, space itself began to expand outward. While you might think that there is a single point where this expansion happened, the expansion of space actually happened everywhere. Everything moved and is moving away from everything else, instead of everything ...