The actual number of planets similar to the earth will likely never be known. The universe is simply too vast. However, it is likely that there are millions of similar planets.
Nobody discovered the universe. We have always known that the universe exists. Discoveries of how the universe works and what it is have been made by many people.
3?
If you were careful not to burn your fingers, about a million Earths could be crammed into the Sun.
We have no means to count the number of planets in the universe, most of which are too far away for us to see them, but it is very likely that there are a great many, perhaps on the order of 1018 or more.
1300 earth can fit in it
The answer is not determinable both because scientists have not determined the exact volume of the universe and because the universe is always expanding.
no
The sun could fit over 1.3 million earths inside of it. Wow... see https://fretzreview.wikispaces.com/Milky+Way,+Universe,+Light+Years
It's flat. It is the center of the Universe.
The sky is the atmosphere of Earth and any visible part of the universe, as observed from Earths surface.
No. It cannot escape the Earths gravity.
No, the term "Earth" specifically refers to the planet we live on. The universe is the vast expanse of all known and unknown matter, energy, space, and time.
6,000 earths
Argon, in the earths atmoshere Helium in the universe Argon in the earths atmoshere Helium in the universe
None that we are aware of, yet. However, the universe is enormously, incomprehensibly large, and it is - remotely! - possible that another planet very similar to Earth might exist elsewhere.
One.
Perhaps the most significant is the earths place and importance in the universe.There are many, many other things we have learned the distance to stars, the diversity of stars and the age of the universe.