- Is dark matter proven?
- Do wormholes exist?
- What is the fastest thing in the universe?
- Does space have a smell?
- How big is space really?
- Is the Milky Way expanding?
- Will space stop expanding?
- What is causing space to expand?
- Will our universe end?
- How cold is space?
- Has anyone been lost in space?
- How is space expanding?
- Is the universe stretching or expanding?
- Does space ever end?
- Can space travel faster than light?
- Is dark matter everywhere?
- What happens if an astronaut floats off in space?
- How fast is space expanding?
- Is time the same in space?
- Is Earth moving through space?
- What is at the end of space?
Is dark matter proven?
Dark matter is also supposed to be five times more prevalent in the universe than the ordinary matter of atoms.
However, the reality is that dark matter’s existence has not yet been proved.
Dark matter is still a hypothesis, albeit a rather well-supported one..
Do wormholes exist?
A wormhole is a tunnel-like connection through space-time, much like the real tunnels bored by worms in a (Newtonian) apple. At present, space-time wormholes are only theoretical constructs derived from general relativity; there is no experimental evidence for their existence.
What is the fastest thing in the universe?
And, while light is still by far the fastest thing in the universe, moving at a staggering speed of 299791.82 km/h, the following list contains some of the other closest things to reach that title of “World’s Fastest.”
Does space have a smell?
According to astronauts, they all smell like space. While each astronaut smells something a bit different, they all agree ‘space stinks’. Obviously, space is a vacuum, so no one has really ‘smelled’ it before in the traditional sense of the word. … But we can smell it indirectly.
How big is space really?
The observable Universe is, of course, much larger. According to current thinking it is about 93 billion light years in diameter.
Is the Milky Way expanding?
The Milky Way, the galaxy which contains our own solar system, is expanding and will eventually grow into its neighbour, Andromeda. Already 100,000 light years in diameter, new research puts its rate of growth at about 500 metres per second.
Will space stop expanding?
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.
What is causing space to expand?
Universe Dark Energy-1 Expanding Universe Astronomers theorize that the faster expansion rate is due to a mysterious, dark force that is pulling galaxies apart. One explanation for dark energy is that it is a property of space.
Will our 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 cold is space?
Hot things move quickly, cold things very slowly. If atoms come to a complete stop, they are at absolute zero. Space is just above that, at an average temperature of 2.7 Kelvin (about minus 455 degrees Fahrenheit).
Has anyone been lost in space?
Soyuz 1 dooms cosmonaut: The first fatal accident in a space mission befell Soviet cosmonaut Vladimir Komarov, whose problem-plagued Soyuz 1 capsule crashed onto Russian soil in 1967. … The resulting drop in pressure also exposed the crew to the vacuum of space — the only human beings to ever experience such a fate.
How is space expanding?
It is the expansion of space, between the time when the stars in these distant galaxies emitted light and our telescopes receive it, that causes the wavelength of the light to lengthen (redshift). … Space is expanding everywhere, so the more distant an object is, the more rapidly it appears to be moving away.
Is the universe stretching or expanding?
The straight answer is that the universe doesn’t expand into anything. There is no space “out there” for it to expand into. What the cosmic expansion does is stretch space itself, as if space were made of some kind of stretchy rubber material. There is no physical border out here, only stretching space.
Does space ever end?
In theory, space goes on and on… 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, for ever and ever, you would never meet.
Can space travel faster than light?
There is no limit to how fast the universe can expand, says physicist Charles Bennett of Johns Hopkins University. Einstein’s theory that nothing can travel faster than the speed of light in a vacuum still holds true, because space itself is stretching, and space is nothing.
Is dark matter everywhere?
1. Dark matter is EVERYWHERE. Planets, stars, asteroids, galaxies – the things that we can actually see – constitute less than 5% of the total universe.
What happens if an astronaut floats off in space?
Space Scare NASA requires spacewalking astronauts to use tethers (and sometimes additional anchors). But should those fail, you’d float off according to whatever forces were acting on you when you broke loose. You’d definitely be weightless. … In space, no kicking and flailing can change your fate.
How fast is space expanding?
72 kilometers per secondWendy Freedman determined space to expand at 72 kilometers per second per megaparsec – roughly 3.3 million light years – meaning that for every 3.3 million light years further away from the earth you are, the matter where you are, is moving away from earth 72 kilometers a second faster.
Is time the same in space?
So depending on our position and speed, time can appear to move faster or slower to us relative to others in a different part of space-time. And for astronauts on the International Space Station, that means they get to age just a tiny bit slower than people on Earth. That’s because of time-dilation effects.
Is Earth moving through space?
For one, the Earth rotates on its axis, hurtling us through space at nearly 1700 km/hr for someone on the equator. That might sound like a big number, but relative to the other contributions to our motion through the Universe, it’s barely a blip on the cosmic radar.
What is at the end of space?
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.