There are about 1011 (a 1, followed by 11 zeroes) galaxies in the known Universe. It is not currently known how much bigger the entire Universe is, compared to the known Universe.
No. 'Cosmos' is another word for 'universe'. The cosmos contain millions of galaxies.
There are at least 2 million galaxies in the COSMOS survey (with billions of stars, planets, and moons in each one; as well as asteroids and nebulae). Their light has taken 13 billion years to reach Earth.
The COSMOS 1526561 galaxy (one of the galaxies in the COSMOS survey) is a spiral galaxy 7500 million light-years from Earth in the Sextans constellation, and is 100,000 light-years in diameter, and contains about 100 billion stars.
The COSMOS 2607238 galaxy (one of the galaxies in the COSMOS survey) is a barred spiral galaxy 6300 million light-years from Earth in the Sextans constellation, and is 100,000 light-years in diameter, and contains about 100 billion stars.
The Fabric of the Cosmos has 569 pages.
Black Holes are scattered throughout the cosmos. It is theorised that there are supermassive black holes at the centre of galaxies such as ours (The Milky Way).
In theory, all galaxies originate from the Big Bang, which is the name that describes the explosion that propelled all matter into the cosmos. All galaxies are moving. All galaxies produce energy like light and gravity. Think of galaxies like you would human beings. Although very different in some ways, they are mostly the same.
As you know, stars are only relevant in its cosmos. The home cosmos, there are hundreds. In the international cosmos, not a lot.
Earth's address in the cosmos is within the Solar System, located in the Orion Arm of the Milky Way galaxy, which is part of the Local Group of galaxies. The specific coordinates are approximately 26,000 light-years from the center of the Milky Way galaxy.
The COSMOS 397553 galaxy (one of the galaxies in the COSMOS survey) is a barred spiral galaxy 6000 million light-years (redshift of 0.66) from Earth in the Sextans constellation, and is 100,000 light-years in diameter (same size as the Milky Way), and contains about 100 billion stars (same number of stars as the Milky Way).
The COSMOS 1177059 galaxy (one of the galaxies in the COSMOS survey) is an elliptical galaxy 7700 million light-years (redshift of 0.97) from Earth in the Sextans constellation, and is 60,000 light-years in diameter (about 1.7 times smaller than the Milky Way), and contains about 40 billion stars (40 percent of the Milky Way's stars).
The COSMOS 786560 galaxy (one of the galaxies in the COSMOS survey) is a spiral galaxy 6000 million light-years (redshift of 0.66) from Earth in the Sextans constellation, and is 120,000 light-years in diameter (1.2 times larger than the Milky Way), and contains about 200 billion stars (200 percent of the Milky Way's stars).