9 Facts About The Universe

October 25, 2017
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Will there be something more fascinating, curious and interesting than the universe? I bet not. Complex, rich and dynamic, this vast space that contains us can show the most unimaginable realities and surprise us at every step. For this reason, any documentary, book or history about it usually traps even the most distant of the interest in the sciences. For you, lover of knowledge, here are these very curious facts about the universe that you might not yet know, but you should.

 

1. How many moons does the Earth have?

How many moons does the Earth have?

I must have surprised you here. The Earth has only one moon, our Moon. However, apparently, there are aspiring natural satellites of our planet. These are some asteroids that keep following us as we orbit the Sun.

There is no doubt that the universe   – whether the region of the Solar System or beyond the galaxies – is an immeasurable place, which houses endless wonders to discover.

 

2. How old are the rays of the sun?

How old are the rays of the sun?

The rays of the Sun take 8 minutes to cover the distance between the star and our bodies. However, these waves are older than we imagine, were born in the solar nucleus about 30,000 years ago.

 

3. The Moon smells like gunpowder

The Moon smells like gunpowder

An intriguing event occurred when the astronauts of the Apollo missions landed: they began to feel a soft smell of gunpowder. Scientists cannot explain why the Moon smells like gunpowder, but maybe its atmosphere is made up of tiny fragments of silicon dioxide crystals.

 

4. What is the mysterious dark matter?

What is the mysterious dark matter?

In honor of the truth, it is not known what the mysterious dark matter is. It is a name given by scientists to all that unknown matter. This is where we are mistaken imagining that it constitutes a low percentage of the whole: in fact, the known matter represents only 5% and dark matter 95% of the universe.

 

5. Collision of two galaxies

Collision of two galaxies

One of the most interesting events to happen in the universe is the collision between the Milky Way and the Andromeda galaxy. Eventually, these two conglomerations of stars will collide, but nothing to worry about, the event will take place in three billion years, not much in astronomical terms.

 

6. What are neutron stars?

What are neutron stars?

By creating a supernova, at the center of these structures arise the neutron stars, the densest bodies that scientists have discovered in the universe, so far, of course … What happens at the intra-atomic level is that at the nucleus of the star electrons and protons contract to become neutrons. These stars, rather small, end up having considerable weights.

 

7. How many stars are there in the universe?

How many stars are there in the universe?

Watching the sky at night, have you ever thought of all those little lights up there and thought how many stars there might be in the universe? The answer is really many, exactly ten billion trillion stars, which would be more than the number of grains of sand on all the beaches in the world, hardly imaginable…

 

8. If two pieces of metal meet, they stay stuck together

Cold Welding

If two pieces of metal meet in the cosmos, they stick together and nothing separates them. This phenomenon is called “cold welding”. In our atmosphere, oxygen molecules cover the surface of the metal, which prevents direct contact. In the vacuum of space, cold welding is possible and can cause malfunctions of space probe.

 

9.  Astronauts’ footprints will remain on the moon for life

Astronaut moon

Unlike the Earth, there is no erosion by wind or water on the moon because there is no atmosphere and the water on its surface is frozen like ice. There is also no volcanic activity to change its surface. Thus, the footprints of the first steps of the astronauts could stay very, very long on the Moon. Maybe as long as she lives. However, satellites are exposed to meteorite bombardment, which can alter its surface. And since it has no atmosphere, it is exposed to the solar wind, which, over time, acts almost like the weather on the Earth and rubs its surface. This process is however extremely slow.

 

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