Changing Universe vs Infinity:


How do we know the universe isn’t Infinite?

An infinite universe could have a geometry that is totally flat like a piece of paper. Such a universe would go on forever and include every possibility — including endless versions of ourselves. On the other hand, a donut-shaped universe would have to be finite, as it’s closed.

What does infinite universe mean?

It means space never ends. It’s a matrix of limitless galaxies, stars, planets, and energy. California Institute of Technology theoretical physicist Sean Carroll cautiously noted last spring that while a finite universe would be provable, scientists can never prove infinity.

Can time be defined?

Scientific Definition

Physicists define time as the progression of events from the past to the present into the future. Basically, if a system is unchanging, it is timeless. Time can be considered to be the fourth dimension of reality, used to describe events in three-dimensional space.

Does space have an 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.

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Does infinite have a beginning?

“Infinite” is an adjective that can apply to various objects. For example, the interval [0,1] contains infinitely many points, and it clearly has both a beginning (its left endpoint, 0) and an end (its right endpoint, 1). The interval (0,1) also contains infinitely many points, and has no endpoints because it’s open.

Is time finite or infinite?

As a universe, a vast collection of animate and inanimate objects, time is infinite. Even if there was a beginning, and there might be a big bang end, it won’t really be an end. The energy left behind will become something else; the end will be a beginning.

Is there more than 1 universe?

There is not one universe—there is a multiverse. In Scientific American articles and books such as Brian Greene’s The Hidden Reality, leading scientists have spoken of a super-Copernican revolution.

Is time Travelling possible?

Yes, time travel is indeed a real thing. But it’s not quite what you’ve probably seen in the movies. Under certain conditions, it is possible to experience time passing at a different rate than 1 second per second. And there are important reasons why we need to understand this real-world form of time travel.

Does space have a bottom?

Our 4D universe does indeed have a top and bottom. The bottom (T=0) was the Big Bang. Space and time curved in, not to a point but to a parabola. There is nothing before T=0 because when you reach 0, whichever way you go, time will increase.

How cold is space?

Far outside our solar system and out past the distant reachers of our galaxy—in the vast nothingness of space—the distance between gas and dust particles grows, limiting their ability to transfer heat. Temperatures in these vacuous regions can plummet to about -455 degrees Fahrenheit (2.7 kelvin).

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What happens if you bleed in space?

In space, blood can splatter even more than it usually does on Earth, unconstrained by gravity. Or it can pool into a kind of dome around a wound or incision, making it hard to see the actual trauma. (Fun fact: If you are bleeding more than 100 milliliters per minute, you are probably doomed.

How long is 1 hour in space?

One hour on Earth is 0.0026 seconds in space.

Thus, upon calculation we find that one hour on Earth is equivalent to seven years in space. Einstein’s theory of Special Relativity stands as a explanation to this calculation.

How hot is the Moon?

When sunlight hits the moon’s surface, the temperature can reach 260 degrees Fahrenheit (127 degrees Celsius). When the sun goes down, temperatures can dip to minus 280 F (minus 173 C). There are also no seasons on the Moon.

Does it rain on the Moon?

The moon has a very thin atmosphere so it cannot trap heat or insulate the surface. There is no wind there, no clouds, no rain, no snow and no storms, but there is “day and night” and there are extreme differences in temperatures depending on where the sun is shining.

Is Mars Hot or cold?

Temperatures on Mars average about -81 degrees F. However, temperatures range from around -220 degrees F. in the wintertime at the poles, to +70 degrees F.