Table of Contents
What is the real time of the universe?
Today, astronomers have derived two different measurements of the age of the universe: a measurement based on direct observations of an early state of the universe, which indicate an age of 13.787±0.020 billion years as interpreted with the Lambda-CDM concordance model as of 2018; and a measurement based on the …
How can we look back in time with a telescope?
Because light takes time to travel from one place to another, we see objects not as they are now but as they were at the time when they released the light that has traveled across the universe to us. Astronomers can therefore look farther back through time by studying progressively more-distant objects.
Is there an invisible universe?
Astrophysicists also study the invisible universe: at electromagnetic wavelengths, shorter than visible light; in the gamma ray and ultraviolet regions; and at even longer wavelengths, in the infrared. Each range gives new information.
Does time expand?
The simple answer is that no, time is not expanding or contracting. The complicated answer is that when we’re describing the universe we start with the assumption that time isn’t expanding or contracting. That is, we choose our coordinate system to make the time dimension non-changing.
How many light-years can a telescope see?
The farthest that Hubble has seen so far is about 10-15 billion light-years away. The farthest area looked at is called the Hubble Deep Field.
How big is the invisible universe?
23 trillion light years
This means the unobservable Universe, assuming there’s no topological weirdness, must be at least 23 trillion light years in diameter, and contain a volume of space that’s over 15 million times as large as the volume we can observe.
Is it possible to see the universe in 10 dimensions?
Theoretically yes. We have to be able to observe the universe in 1o dimensions to make this possible. You could ‘see’ the entire universe with all its imaginative forms if you are watching it in 10 dimensions. Time is one of the dimensions in this set.
How far back in time can we see the universe?
Therefore, the longer we wait, the farther we can see, as light travels in a straight line at the speed of light. So after 13.8 billion years, you’d expect to be able to see back almost 13.8 billion light years, subtracting only how long it took stars and galaxies to form after the Big Bang.
Is it possible to see the whole universe?
Only if the universe was contracting and assuming it is finite (even if it’s not contracting then given that it’s finite we could see whole of it but light would take some time to reach us). In reality, thats not the case, universe is expanding at an accelerating rate and we don’t know if its finite or not.
How far away are the objects in the universe?
Perhaps the objects now could be as far as 27.6 billion light years away, assuming their light just reaches us now and they speed away from us at almost the speed of light. The different possible fates of the Universe, with our actual, accelerating fate shown at the right. (NASA & ESA) 3.)