Fact 1: Space is completely silent.
Fact 2: The hottest planet in our solar system is 450° C.
Fact 3: There may be life on Mars.
Fact 4: Nobody knows how many stars are in space.
Fact 5: Halleys Comet won't orbit past Earth again until 2061.
Fact 6: A full NASA space suit costs $12,000,000.
Fact 7: Neutron stars can spin 600 times per second Fact 8: The solar system includes the Sun and all the objects that orbit around it due to its gravity. This includes things such as planets, comets, asteroids, meteoroids and moons. The Solar System formed around 4.6 billion years ago. Fact 9: It is now believed that about 95% of the Galaxy is composed of dark matter, a type of matter that does not seem to interact with the rest of the Galaxy's matter and energy in any way except through gravity. The luminous matter makes up approximately 9 x 1010 solar masses.