Table of Contents
How do you find the radius of the observable universe?
The radius of the observable universe is therefore estimated to be about 46.5 billion light-years and its diameter about 28.5 gigaparsecs (93 billion light-years, or 8.8×1026 metres or 2.89×1027 feet), which equals 880 yottametres.
What is the limit of the observable universe?
46.1 billion light years
13.8 billion years after the Big Bang, it’s now 46.1 billion light years in radius. That’s the limit of what’s observable. Any farther than that, and even something moving at the speed of light since the moment of the hot Big Bang will not have had sufficient time to reach us.
How much of the visible universe have we explored?
4 percent
To date, scientists have explored about 4 percent of the visible universe. That’s made up of planets, stars and galaxies that astronomers can see.
How can we see farther than 13.8 billion light-years?
Even if the fabric of space didn’t change over time, there are plenty of objects we can see today that could be farther away than 13.8 billion light-years. If a distant object emitted light and then moved quickly away from us, it could be just about as far away today as double the light-travel distance.
How many light-years is the observable universe?
93 billion light years
Well, the observable universe is currently 93 billion light years across.
What is the radius of the observable universe?
The radius of the observable universe is about 47 billion light years, much more than the age of the universe multiplied by the speed of light. Space has been expanding since the beginning of the universe, so the distant parts of the universe that we can see are causally disconnected from each other.
How many light years old is the universe?
The Universe is 14 Billion Years Old and the Observable Radius of the Universe is 14 Billion Light-Years Old. It makes sense. Light travels at the speed of light, so, in 14 Billion Years, Light will travel 14 Billion Light Years.
How do you calculate the size of the universe?
This quantity refers to the distance to the particle horizon, r p, i.e. to the radius of the observable universe. The diameter would be twice as large. This can be calculated similarly to calculating the age of the universe as shown above. We have seen that v local := d x R d t ≤ c.
What is the extent of the universe?
The extent of the universe is likely much, much larger, but science cannot give any precise answers yet. The radius of the observable universe is about 47 billion light years, much more than the age of the universe multiplied by the speed of light.