What is a black hole?

No scientist is complete without a research notebook. After all, science is all about creating and testing hypotheses, and that requires a lot of note taking and meticulous record keeping. From grade school to college, we’ve learned that science notebooks are essential to the scientific process. In fact, sometimes the only ways we’ve learned about major advances in science have been through famous scientist’s notebooks and their research. You can’t live forever, but your research might be able to and it can make an impact even decades after you’re gone. Scientists and their notebooks are the reason why we know so much about space’s mysterious black holes.

1. Space is Like a Blanket
Think about making your bed. You pull the sheet and blanket across to make a nice smooth surface, and then your kid or your cat comes along and jumps right in the middle. What does that do? Well, it creates a nice big dent where the object pulled on the blankets and made them wrinkle. Black holes and planets do this to space. The gravitational pull of black holes pulls space around it, causing it to wrinkle and no longer makes straight lines.

2. There is More Than One Type of Black Hole
Laboratory notebooks are used because of the little details matter. Think about how many different types of ants there are, or different types of grass. Someone took the time to notice the differences and record them for scientific purposes. In just the same way, scientists have discovered that there are different types. Some spin, some are electrical, some are both.

3. Black Holes Make Sound
There’s no sound in space, but there is a way to convert the energy of motion into sound waves, and what researchers have found is that black holes are noisy. The sound that they make is compared to the sound your bathtub makes while water is draining out of it.

4. Black Holes Are Bottomless Pits
To be fair, no one has ever seen the bottom of a black hole so we don’t really know if they’re bottomless. What scientists have recorded in laboratory notebooks is that black holes pull in everything around them no matter how big or how small. They can pull in suns, stars, galaxies, you name it. They are lean, mean, space-eating machines.

5. They Make Time Slow Down
In essence, they have the ability to freeze in time because of gravitational time dilation, which is explained by Einstein’s theory of relativity. Basically, in a fight between black holes and time, black holes would be the reigning champions.

6. Black Holes Were Once Stars
Over the years there has been a remarkable lack of information about black holes. Most of the information recorded in lab notebooks and research papers have been pretty minimal compared to what we know about other aspects of space. However, scientist do know that black holes were once stars and that it takes very special circumstances for a dying star to turn into a black hole.

The above facts explain just what is a black hole







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