The universe is actually about 15 billion years old.
I'm not sure where you got the statistic that the Hubble Space Telescope can see 20 billion light years into space; I think you're off by a factor of three or so.
It is difficult to determine the exact number, but based on current estimates and the vastness of the universe, scientists believe there could be billions of Earth-like planets in the observable universe.
The problem is - we can only speculate on the origin of the universe - based on our limited knowledge of the bit of space we live in ! There are literally billions of other galaxies out there - with hundreds of billions of suns and planets. There could be many other rules of physics & chemical elements that we just don't know of ! There's just no way of proving how the universe started (or whether this is the first ever universe !).
Stars are located in outer space. The sun is our closest star. Other stars are much more farther away. But, some bright lights in the sky are not always stars. They could be a passing airplane or even a space station, or a planet, or even a very far away galaxy. There are billions of stars in our galaxy, and billions of billions in the universe.
It is very easy to answer- First, I want to tell that , what is a universe? A universe is a limitless space with billion of stars in it. So,lets come to the point.There is no boundary in the universe as it is a very vast space and billion of other universe are also there. I wish that you could understand it
The Solar System was formed about 4.6 billion years ago.The Universe was created about 13.7 billion years ago.Current theories suggest that the Universe was created from a singularity (An infinitely small area of space time without dimensions) - religious theories differ.If all of space was created from a single point, then all areas could be termed as the centre of the Universe.
We are not sure exactly how many galaxies are in the universe. There could very possibly be millions or even billions.
Estimates suggest there are around 100 billion to 200 billion galaxies in the observable universe. This number could be even higher as our technology and observation methods improve.
In the entire Universe there are around 7 billion "people" a.k.a. human beings. This number is growing and all of these 7 billion people live on planet Earth.
i believe in aliens because their is billions of planets in the universe that their could be aliens on a planet
The total number of planets in the universe is unknown, but there are likely many billions, perhaps many with conditions similar to Earth. More than 300 planets outside our solar system have been discovered. All are within our own Milky Way galaxy, because accurate observations of planet-sized masses in other galaxies is not currently possible. Theoretical extrapolations suggest that there are indeed planets around many stars in other galaxies as well.
There are billions of planets in the universe, with estimates ranging from 100 billion to 200 billion planets in the Milky Way galaxy alone. Beyond our galaxy, there are billions more galaxies with their own planets, making it impossible to determine an exact number of planets in the universe.
Personally, I am a human on earth, which revolves around the sun, which is one star out of billions in our galaxy, which is part of a galaxy cluster, which is one of billions of galaxy clusters in the universe. For all we know, there could be multiple universes within the giant vacuum of space. So I am an extremely minute spec on the landscape of the universe.
one thousand billions makes one trillion. And no, there are no trillionaires. The worlds richest man has 3 - 4 billion dollars.
Yes, the Universe is huge! There are trillions of planets in the Universe, billions of Solar Systems and millions of Galaxies, and to think that out of all of these there is not at least one planet that has intelligent life?
According to present knowledge and models of the Universe, the first galaxies could form when the Universe was less than 1 billion years old (it is now about 15 billion years old).
i did this research and made my own equation on my own, take our Galaxy for example 1 galaxy=150-350 billion stars lets take 250 billion stars, and if each star has a solar system of 1 to 9 planets, lets say each star has 5. 5 planets times 250 billion stars = 1,250 billion planets and if at least 1 in 5 planets has life on it 1/5 X 1,250 billion planets = 250 billion planets so i think maybe at least 250 billion planets in OUR galaxy have life but that's only our Galaxy (Milky Way) and in the universe there are billions of galaxies maybe trillions, and how do we know this is the only universe, could there be more?
It is difficult to determine the exact number, but based on current estimates and the vastness of the universe, scientists believe there could be billions of Earth-like planets in the observable universe.