Outer Space Facts

Outer Space Facts
Outer space refers to the emptiness that exists between objects in space including Earth. Most of outer space is made of plasma. When plasma collects and condenses, it forms stars and galaxies. Space exploration began during the 20th century and the first Earth orbit was completed in 1961. Exploring space is difficult for humans because of the high amounts of radiation and the vacuum effect that exists there.
Interesting Outer Space Facts:
Outer space exploration began with high altitude balloons.
All of the known planets have been reached by unmanned spacecraft.
The idea of there being an outer space was discovered by Aristotle in 350 BC.
According to the Big Bang theory outer space was formed by the vacuum that was left behind after the formation of the stars and galaxies.
Planets are able to orbit because there is no friction in outer space.
The Moon is moving away from Earth at a rate of about 3.8 cm a year.
It takes 300,000 years for the energy inside the sun's core to become sunlight that we can see.
Two pieces of raw metal would combine into one piece of metal if they touched in space.
Quasars are black holes in space that exist at the center of galaxies.
Some of the gaseous planets have a small density and could therefore float in water.
Liquids in space do not flow and instead form themselves into spheres.
There are four asteroids that orbit Earth and are sometimes referred to as Earth's extra moons.
The conditions of outer space allow our spines to stretch out causing us to be about two inches taller.
Since there is no wind on the moon, foot prints left there can last millions of years.
There are about 15 galaxies that orbit the Milky Way galaxy.


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