- How far does outer space go?
- Is empty space really empty?
- Can space travel faster than light?
- Are humans 99.9 percent empty space?
- Does the universe ever end?
- Is space actually infinite?
- Are there any humans lost in space?
- Does space have a smell?
- What percentage of space is empty?
- What is beyond the universe?
- What does space smell like?
- What was before the universe?
- Is Outer Space endless?
- How do we know space is endless?
- How fast is space expanding?
How far does outer space go?
93 billion light yearsThe observable universe can even be measured.
It is 93 billion light years from one side to the other.
Now that’s a distance even astronomers find hard to think about.
It’s like making about 300,000 laps of our Milky Way Galaxy, yet our Sun has only made 20 laps in its entire life..
Is empty space really empty?
Outer space is not completely empty—it is a hard vacuum containing a low density of particles, predominantly a plasma of hydrogen and helium, as well as electromagnetic radiation, magnetic fields, neutrinos, dust, and cosmic rays. … Outer space does not begin at a definite altitude above the Earth’s surface.
Can space travel faster than light?
The restriction that “nothing can move faster than light” only applies to the motion of objects through space. The rate at which space itself expands — this speed-per-unit-distance — has no physical bounds on its upper limit.
Are humans 99.9 percent empty space?
If we lost all the dead space inside our atoms, we would each be able to fit into a particle of dust, and the entire human species would fit into the volume of a sugar cube. …
Does the universe ever end?
As the energy density, scale factor and expansion rate become infinite the universe ends as what is effectively a singularity.
Is space actually infinite?
Because we live in three dimensions, 250 times the radius means (250)3 times the volume, or more than 15 million times as much space. But, big as that is, it still isn’t infinite. A lower bound of the Universe being at least 11 trillion light years in all directions is tremendous, but it’s still finite.
Are there any humans lost in space?
However, of the roughly 550 people who have so far ventured into space, only three have actually died there.
Does space have a smell?
As it turns out, space actually does have a distinct odor. … Astronauts returning from space claim that their suits smell, in a word, burnt. The lingering scent of space is “acrid” and “metallic,” reminding the astronauts of charred meat or welding fumes.
What percentage of space is empty?
99.9999999%99.9999999% of your body is empty space. Some days, you might feel like a pretty substantial person.
What is beyond the universe?
Beyond that, there’s a sea of galaxies: perhaps two trillion in total contained in our observable Universe. … That’s what the Big Bang was, the day that the Universe as we know it was born. For a galaxy that’s relatively close by, it’s just about the same age that we are.
What does space smell like?
Astronaut Thomas Jones said it “carries a distinct odor of ozone, a faint acrid smell…a little like gunpowder, sulfurous.” Tony Antonelli, another space-walker, said space “definitely has a smell that’s different than anything else.” A gentleman named Don Pettit was a bit more verbose on the topic: “Each time, when I …
What was before the universe?
It’s possible that before the Big Bang, the universe was an infinite stretch of an ultrahot, dense material, persisting in a steady state until, for some reason, the Big Bang occured. This extra-dense universe may have been governed by quantum mechanics, the physics of the extremely small scale, Carroll said.
Is Outer Space endless?
The observable universe is still huge, but it has limits. That’s because we know the universe isn’t infinitely old — we know the Big Bang occurred some 13.8 billion years ago. That means that light has had “only” 13.8 billion years to travel.
How do we know space is endless?
It can be positive, negative, or zero. Our best observations to date strongly suggest that the universe has no spatial curvature. It may be expanding in time, but the geometry of space, at any given time, is Euclidean. The simplest topology that corresponds to Euclidean geometry is that of flat, infinite space.
How fast is space expanding?
In 2001, Wendy 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.