For centuries people have been wondering about the universe and how was the whole space created. Throughout the years mankind was searching and digging for answers and thanks to those who actually have been in space and know a lot about it, we found few astonishing facts about the universe
- The space is silent
The reason why the universe is silent is because there’s no atmosphere and the sound waves need a medium to be transmitted. Although the space is a virtual vaccum, that doesn’t mean there is no sound in space. The sound exist as electromagnetic vibrations. As for the radio waves, they can travel through space. That would be the answer if you were asking yourselves how the astronauts do it.
- The smallest stars can spin at rate of 600 rotations per second
The smallest stars known to exist are the neutron stars, which are type of a compact stars produced after the final titanic collapse of a massive star. Some of the neutron stars can spit rapidly up to 716 times per second or 43.000 revolutions per minute. Even though there are 100 million neutron stars in the universe, the non-rotating and non-accreting are virtually imperceptible. They can easily be detected only if they are pulsar or part of a binary system.
- In known space there is infinite number of stars
There is no way to know exactly how many objects there are in the known universe. Although NASA can speculate the numbers and say that there are a zillion of stars and a zillion is any amount that can’t be count. Scientists from Australian National University have roughly calculated the number of stars at 70 sextillion, or 70.000 million million, but basically this information is just a theory.
- The footprints on the moon will probably be there for at least 100 million years
We all know that there is no atmosphere, no wind or water on the moon to abrade the Apollo astronauts’ footprints on the surface which means that not only the footprint, but the spaceship print, the abandoned materials will be marking the moon’s exterior for a long time. However, because of the moon’s dynamic environment, they won’t stick around forever. Our natural satellite is continually bombarded with meteorites which lead us to a conclusion that, even though is a slow process, the erosion is still happening.
- The sun takes out 99% of our solar system’s mass
The sun’s density is the reason why it deducts 99% of the whole solar system which allows our star to have gravitational domination. Our sun is a “G-type main-sequence star” and that indicates that it fuses around 600 million tons of hydrogen to helium per second. Also it can transform 4 million tons of matter to energy as a side effect. Because of its type, when the sun dies it will turn into a red giant and wrap the earth and everything within. But it’s a fact that the sun is going to be alive for at least 5 billion years, so no worries.
- Every hour the sun hits the Earth with more energy than the planet uses in a year
The scientific researches show us that the solar technology can generate less than one-tenth of 1% of global energy request. There are few elements responsible for this to happen, such as needed land for solar panels to provide enough energy for people to exploit, how much it depends on the weather circumstances and the cost of the technology needed. Regardless the disadvantages the usage of solar energy has grown 20% per year in the past 15 years.
- The cold welding effect
If by any chance parts of two types of metal touch in space they will be bond permanently because the atoms of the pieces of metal have no clue about their difference so the mass combines them together. The reason why this could not happen on Earth is because the water and the air are dividing the elements.