All Modules 24-If i were an astronaut - Module 3 | Page 9
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Pluto is not a planet.
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A person that weighs 100 kilograms on earth would weigh only 38 kilograms on Mars.
This is due to gravity.
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Since the “Big Bang” theory is currently the most accepted one, we can say that the
universe was infinitely hot in its origin and it has been cooling down slowly as it
expands.
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According to the scientific measurement of nuclear radiation, the universe in 13.7 billion
years old
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Scientists think that even though the earth is round, the universe is flat.
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Even though we can´t see many things with any technology, scientists say that there is a
matter, and certain types of energy that exist in the universe and soon we will be able to
see them and measure them.
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The universe does not have a center.
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To be able to understand the universe, scientists study structures that are smaller than
an atom.
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All the planets in the solar system are the same age.
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The earth is the only known planet that has water in liquid form.
Interesting data a\bout astronauts:
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They are people that travel through space but first they must become pilots at least during
1000 hours.
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The maximum amount of time that a person has lived in space without coming to earth
has been y 2 years and 73 days in 1991.