- Is nothingness possible?
- How many years is a light year?
- Where does space end?
- How long till the universe ends?
- Will the universe last forever?
- Does space ever end?
- How many galaxies are there?
- Will humans ever travel at the speed of light?
- How big is the universe in light years?
- Is a light year 365 days?
- How far back in time can we see?
- Could we travel at the speed of light?
- Can you reach the edge of the universe?
- How long would it take to travel 13 billion light years?
- What is beyond the observable universe?
- Does the universe end?
- How fast can a spaceship travel?
- What was before the universe?

## Is nothingness possible?

‘Nothing exists’ is simple in the sense of being an easy to remember generalization.

…

There is no such thing as nothingness, and zero does not exist..

## How many years is a light year?

For most space objects, we use light-years to describe their distance. A light-year is the distance light travels in one Earth year. One light-year is about 6 trillion miles (9 trillion km). That is a 6 with 12 zeros behind it!

## Where does space end?

No, they don’t believe there’s an end to space. However, we can only see a certain volume of all that’s out there. Since the universe is 13.8 billion years old, light from a galaxy more than 13.8 billion light-years away hasn’t had time to reach us yet, so we have no way of knowing such a galaxy exists.

## How long till the universe ends?

According to the formulas used to calculate cutoffs, a universe that is 13.7 billion years old will reach its cutoff in about 5 billion years, his team concludes. For most people, the idea that a mathematical tool could be elevated to a real-world event might seem strange, but there are precedents for it in physics.

## Will the universe last forever?

As long as the amount of stuff doesn’t go over a critical threshold, the universe will continue to expand forever, and eventually suffer heat death, freezing out. But if there’s too much stuff, the expansion of the universe will slow down and stop. Then the universe will begin to contract.

## Does space ever end?

It’s because of the shape of space. Our part of space, or the observable universe, has a special shape: it is flat. That means if you and a friend each had your own rocket ship and you both took off and travelled in a straight line, forever and forever, you would never meet.

## How many galaxies are there?

100 billion galaxiesAll in all, Hubble reveals an estimated 100 billion galaxies in the universe or so, but this number is likely to increase to about 200 billion as telescope technology in space improves, Livio told Space.com.

## Will humans ever travel at the speed of light?

“There is no real practical limit to how fast we can travel, other than the speed of light,” says Bray. Light zips along at about a billion kilometres per hour. … Therefore, humans should – in theory – be able to travel at rates just short of the “Universe’s speed limit”: the speed of light.

## How big is the universe in light years?

The observable Universe is, of course, much larger. According to current thinking it is about 93 billion light years in diameter.

## Is a light year 365 days?

A light year is the distance light travels in one year (365 days). … It will always take light 1 year to travel a distance of 1 light year. In a vacuum, light always travels at 300,000 kilometers per second (or 670 million miles per hour).

## How far back in time can we see?

In actuality, we can see for 46 billion light years in all directions, for a total diameter of 92 billion light years.

## Could we travel at the speed of light?

According to Einstein’s general theory of relativity, as an object moves faster, its mass increases, while its length contracts. At the speed of light, such an object has an infinite mass, while its length is 0 — an impossibility. Thus, no object can reach the speed of light, the theory goes.

## Can you reach the edge of the universe?

There is no edge to the universe, as far as we know. There’s an edge to the observable universe—we can only see so far out. That’s because light travels at a finite speed (one light-year per year), so as we look at distant things we’re also looking backward in time.

## How long would it take to travel 13 billion light years?

That’s seventy-six sextillion, two hundred and fifty four quintillion, forty eight quadrillion, and some odd miles away. If you were to walk there at an average speed of 3 mph, it would take you 2,899,613,963,039,014,373 years to get there.

## What is beyond the observable universe?

A lot more universe exists beyond what we are able to observe. … According to the theory of cosmic inflation, the entire universe’s size is at least 10^23 times larger than the size of the observable universe. Ultra Deep Field via Hubble/NASA. That’s a lot of universe that we are missing.

## Does the universe end?

Theories about the end of the universe. The fate of the universe is determined by its density. The preponderance of evidence to date, based on measurements of the rate of expansion and the mass density, favors a universe that will continue to expand indefinitely, resulting in the “Big Freeze” scenario below.

## How fast can a spaceship travel?

about 17,500 miles per hourLike any other object in low-Earth orbit, a Space Shuttle must reach speeds of about 17,500 miles per hour (28,000 kilometers per hour) to remain in orbit.

## What was before the universe?

The initial singularity is a gravitational singularity predicted by general relativity to have existed before the Big Bang and thought to have contained all the energy and spacetime of the Universe.