If anything in this universe is the most mysterious then it is the universe itself. It has infinite numbers of mysteries and amazing facts that no one even can imagine. Here I have explained only 7 but these are the most amazing facts about the universe that I considered and you must know about it. Our universe contains everything that is physically present like atoms, elements, planets, stars, black holes, galaxies, dark matter, and dark energy.
Facts about the universe
1. Universe expanding faster than anything
You have heard about the speed of light, it is 3 × 105 km/sec in a vacuum. If we consider there is a vacuum hole from one side to another side of our planet earth and pass the light through the hole then this light can cross 24 earth in 1 second.
Let’s do some math:-
the diameter of earth= 12742 km
24×12742= 305808 (it’s almost equal to the light travel in one second)
But can you imagine the expanding speed of the universe is faster than the light? Yes! Our universe is expanding with accelerating speed. Its observable diameter is around 93 billion light-years and the universe was formed 13.7 billion years ago. It means in 13 billion years it expands 93 billion light-years so in 1 year it expands around 7 light-years. Then the speed of the universe is around 7 times greater than the speed of light yet.
2. 95% mass of the universe is filled with invisible substance and force
The planets, stars, galaxies, black holes and what others we could have observed in the universe, actually only contain 5 % of the universe. 95 % of the mass present in the universe is invisible. These are called dark matter and dark energy because it can not be seen. Dark energy is a force that repels gravity and expands the universe with accelerating speed. 70% is dark energy and 25% is dark matter in the universe. Only 5% are all elements, matters, planets, galaxies and other physical objects.
3. A 5 cm part of a neutron star is heavier than Earth
A neutron star gives amazing facts about the universe because of its heavier density and mass. A neutron star can weigh around 1.4 times greater than our sun but its size is around 20 km in diameter. So when we consider the weight of only 5 cm of neutron star then it would be approximately equal to the weight of our planet earth.
Let’s do some math:-
20 km → 1.4 × mass of the sun
20 km → 1.4 × 2 × 1030
20 *1000*100 cm → 1.4 × 2 × 1030
1 cm → 1.4 × 1024
5 cm → 7.0 × 1024
So it will be heavier than the mass of the earth (6 × 1024 kg)
4. What if we put a spoonful of a neutron star on the surface of the earth
An average neutron star has a density of around 2 × 1018 kg/m3. In short, neutron stars are formed when the core of a massive star collapses then the protons and electrons of the core melts and form neutrons. If a neutron star collides with any planet of our solar system, it will break the planet into parts because of its high density. Only one spoonful of a neutron star is enough to break our earth.
5. A giant alcohol cloud floating in space
There is a giant cloud of alcohol are floating in a region of the space. That region is known as W3(OH) and its almost 7000 light-years away from us. This floating alcohol cloud has a diameter of greater than 1000 times of our solar system. It has enough alcohol to fill a glass of beer 400,000,000 billion billion times but fortunately, these alcohols are not suitable for drinking.
6. Number of stars are more than grains of sand on the earth
There are 100 billion galaxies are present in the universe and each galaxy has 100 billion stars, so the number of stars are around 1022 in the space. This large number of stars are much greater than the grains of sand present on the earth. In 1 cubic centimeter, 8000 grains of sand can be packed. If we count all sands present on the earth including sands on beaches, desserts still it will be 10 times lesser than the number of stars.
7. Our earth can become a black hole
A black hole is a large amount of matter compressed into a very dense region. Our planet can become a black hole if it gets compressed very small enough as the size of a marble. The earth would need to be a less than 1 cm radius of the sphere to become a black hole. The gravitational pull of the black hole is so strong that nothing could escape from it, even light. But this small size of the black hole will not have enough gravitational pull as a real black hole has.
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