Table of Contents
- 1 How is the radius of the universe calculated?
- 2 What is the radius of the universe in miles?
- 3 What was the radius of the universe 14 billion years ago?
- 4 Why is the observable universe 46 billion light-years?
- 5 What light-years mean?
- 6 What is the radius of the universe?
- 7 How long will we be able to observe the universe?
How is the radius of the universe calculated?
By taking the ratio of the standard three dimensional volumes for the observable universe to the Hubble volume, and setting it equal to the ratio of the corresponding volumes derived using the equations for the surface volume of a 3-sphere, we can solve for the radius of the observable universe.
What is the radius of the universe in miles?
The observable universe is approximately 5.4×1023 miles in diameter.
What is the diameter of the universe in light-years?
93 billion light-years
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.
Is the universe billions of light-years in age?
With this data, cosmologists calculated the universe’s age to be 13.5 to 13.9 billion years old. About a decade later, the Planck satellite measured the CMB in even more detail, getting a Hubble constant of 67.66 and an age of 13.8 billion years.
What was the radius of the universe 14 billion years ago?
The Cosmic Background Radiation from the birth of the universe that we are seeing now originated when the universe was a sphere with a 42 million light year radius.
Why is the observable universe 46 billion light-years?
The universe is about 13.8 billion years old, so any light we see has to have been travelling for 13.8 billion years or less – we call this the ‘observable universe’. However, the distance to the edge of the observable universe is about 46 billion light years because the universe is expanding all of the time.
What is the diameter of the known universe?
93.016 billion light yearsObservable universe / Diameter
What is the size of the visible universe?
46.508 billion light yearsObservable universe / Radius
What light-years mean?
Light-year is the distance light travels in one year. Light zips through interstellar space at 186,000 miles (300,000 kilometers) per second and 5.88 trillion miles (9.46 trillion kilometers) per year.
What is the radius of the 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.
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.
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.
How long will we be able to observe the universe?
For instance, objects with the current redshift z from 5 to 10 will remain observable for no more than 4–6 billion years. In addition, light emitted by objects currently situated beyond a certain comoving distance (currently about 19 billion parsecs) will never reach Earth.