These are some mind blowing facts about space,
- The Sun makes up 99.8% of the entire mass of the whole Solar System. One million Earths would be needed to be the same size as the Sun.
- Space is not that far away, Space officially begins at the universal marker of the Karman Line. This invisible boundary is 100km above the Earth.
- When the moon is closer to the horizon, it is closer to objects like buildings and trees which therefore in comparison makes the moon look bigger.
- In a vacuum like space, when two pieces of metal touch each other they bond together. This is a process called cold welding.
- If a star passes too close to a black hole, it can be torn apart.
- For years it was believed that Earth was the only planet in our solar system with liquid water. More recently, NASA revealed its strongest evidence yet that there is intermittent running water on Mars, too!
- You wouldn’t be able to walk on Jupiter, Saturn, Uranus or Neptune because they have no solid surface!
- If you could fly a plane to Pluto, the trip would take more than 800 years!
- There are more stars in the universe than grains of sand on all the beaches on Earth. That’s at least a billion trillion!
- We aren’t sure if wormholes exist.
Now these are some awesome facts about Black holes,
1. Black holes are only dangerous if you get too close.
Some think that black holes are like cosmic vacuums that suck in the space around them when, in fact, black holes are like any other object in space, albeit with a very strong gravitational field.
If you replaced the Sun with a black hole of equal mass, Earth would not get sucked in – it would continue orbiting the black hole as it orbits the Sun, today.
Black holes look like they're sucking in matter from all around, but that's a common misconception. Companion stars shed some of their mass in the form of stellar wind, and the material in that wind then falls into the grip of its hungry neighbour, a black hole.
2. Weird time stuff happens around black holes.
This is best illustrated by one person (call them Unlucky) falling into a black hole while another person (call them Lucky) watches. From Lucky’s perspective, Unlucky’s time clock appears to be ticking slower and slower. This is in accordance with Einstein’s theory of general relativity, which (simply put) says that time is affected by how fast you go, when you’re at extreme speeds close to light. The black hole warps time and space so much that Unlucky’s time appears to be running slower. From Unlucky’s perspective, however, their clock is running normally and Lucky’s is running fast.
3. You can't directly see a Black hole.
Because a black hole is indeed “black” and no light can escape from it. so, it’s impossible for us to sense the hole directly through our instruments, no matter what kind of electromagnetic radiation you use, light, X-rays, whatever.
4. Objects Appear To “Freeze” Near A Black Hole.
As you reach the event horizon, you are moving at such high speeds due to the strong gravitational force from the black hole, that time will slow down.
To an outside observer with a telescope, an object passing the event horizon will appear to slow down then “freeze” in time without ever seeming to pass through the event horizon.
5. A Person Falling Into A Black Hole Would Be Spagettified.
If a person was able to survive long enough to falling into a black hole, he would at first experience weightless as he goes into free fall, but then feel intense “tidal” gravitational forces as he got closer to the center of the black hole. In other words, if his feet were closer to the centre than his head, then they would feel a stronger pull until he eventually is stretched and then ripped apart. As he falls in he may observe distorted images as the light bends around him and he will also still be able to see beyond the black hole as light continues to reach him from the outside.
Sources:
Top 100 Interesting Facts About Space
10 Mind-Blowing Scientific Facts About Black Holes
10 Amazing Facts About Black Holes - Universe Today