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How can the universe be 156 billion years in diameter if it is only 14 billion light years old?
Wiki User
∙ 9y ago
The diameter must be expressed in a unit of distance/length - for example in light-years - NOT in years.
The answer is that the distant parts of the Universe are going away from us, faster than the speed of light. Inside its own local space, nothing can move faster than the speed of light. But in the case of the expansion of the Universe, you might say that space itself is expanding. This makes it possible for objects to move away from us faster than light.
Wiki User
∙ 9y ago
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How big do astronomers estimate the universe to be?
There is no end. They Universe is always expanding due to the big bang. ----------------------------------------------------------------------------------------- No, the Universe actually closes in on itself. If you left from here in any direction, and you went far enough and fast enough, you would arrive right back here. In any case, the Universe does not have any boundaries.
How big is the solar system compared to the universe?
It is impossible to answer. The visible Universe is about 13.7 billion light years across and getting larger with every year. The Solar System is a mere 2 light years at most, a mere 6'850'000'000 of that number.
What is the diameter of Betelgeuse in light years?
Diameters of stars are not usually expressed in light-years. The term "light-year" is used for much larger distances. Its diameter is somewhere around a thousand times the diameter of our Sun, so that would be about 1.4 billion kilometers. Of course, you can convert that to light-years if you like.
What is a universe when talking about the solar system?
The universe is all existing matter, energy, space, and time, seen as a well ordered whole known as the cosmos. Believed to be at least 10 billion light years in diameter, containing a vast number of galaxies. Said to have been expanding since its creation in the Big Bang around 13 billion years ago.
What is the furtherest distance scientists have been able to see into the universe?
The answer is quite more complicated than it seems. The farthest astronomers have seen in the visual spectrum is the Hubble Ultra Deep Field. This picture looks back in time about 13 billion years, and the galaxies it has captured wereprobably no more than 800 million years old. But it is a common misconception that since light travels at a set speed, a picture looking back 13 billion light years must be a picture of something 13 billion light years away. This isn't the case. Since the universe is constantly expanding, the galaxies depicted in the HUDF picture are no longer 13 billion light years away. In reality, the universe is now about 90-140 billion light years across. It comes off as a paradox because the universe technically expanded faster than the speed of light (how else could light from galaxies now 90 billion light years away reach us in 13 billion years?) It's a strange consequence of general and special relativity. Put simply, the light from the farthest objects scientists can see originated 13 billion light years ago, but these objects are not that far away in real time.
How large is the known universe?
The observable Universe has a diameter estimated at 93 billion light-years.
How many galaxies are there since the universe is 93 billion light-years in diameter?
300 sextillion.
How huge is the universe?
The observable universe is thought to be a sphere about 93 billion light years in diameter (see related link).
How many light years is the diameter of the known universe?
The OBSERVABLE Universe has a diameter of about 93 billion light-years. "Observable" means that the light of anything beyond that hasn't had time to reach us, since the time of the Big Bang.
How big is the univearse?
The observable Universe has a radius of about 46 billion light-years; that would be a diameter of 92 billion light-years. The entire Universe is likely much bigger, but it isn't know how much bigger.
What is the longest known distance in light years?
That would be the distance from one edge of the Known Universe to the other. As the Known Universe is believed to be approximately 15 billion years old, that would be 30 billion light years in diameter.
How many galaxies are there in the universe since it's 93 billion light-years in diameter?
1.5 trillion.
What is univerese?
The universe is all existing matter and space considered as the cosmos. It is at least 10 billion light years in diameter,
Can any telescope map out the whole 13.7 billion-light year diameter universe?
The observable universe is significantly bigger than 13.7 billion light-years in diameter; it's closer to 14 billion parsecs radius, which gives a diameter of around 93 billion light-years.That said ... no, it can't. It can't even map the much smaller subset of the observable universe you describe, because large swathes of sky are blocked by the rest of the Milky Way galaxy; we can only see objects that are significantly outside the plane of the galaxy itself.
Are all 100 billion galaxies in the observable universe up to 13.5 billion light-years away?
Yes, all 100 billion galaxies in the observable universe up to 13.5 billion light-years away.
How big do astronomers estimate the universe to be?
There is no end. They Universe is always expanding due to the big bang. ----------------------------------------------------------------------------------------- No, the Universe actually closes in on itself. If you left from here in any direction, and you went far enough and fast enough, you would arrive right back here. In any case, the Universe does not have any boundaries.
Will Hubble make a 3D map of at least 100 billion galaxies in the observable universe?
No, because it will be impossible for Hubble make a 3D map of at least 100 billion galaxies (i.e. 60 billion spiral and barred spiral galaxies, 20 billion lenticular galaxies, 15 billion elliptical galaxies, and 5 billion irregular/peculiar galaxies) in the observable universe, at distances up to 13 billion light-years; since the observable universe is 13.7 billion light-years in diameter.
