Solar System Exploration
In 1609 Galileo heard that in germany that they invented a instrument that allowed you to see distance thing in the sky though they were near by. Galilieo found a way to improve it. he made a three-powered spy glass. But it wasnt good enough to see distant things. So he taught him self the art of lens grinding and increasenly made it more powerfull that it can magnife up to 20 times. He later discovered the moon was rough. In 1610 he found 4 moons of jupiter, stars that were invisible to the naked eye and saturn and its rings. He later discovered that all palanets orbit the sun not the earth.
Contributions to Knowledge
The Voyager 1 went out into space in 1977 5th of September its twin voyager 2 went out 2 weeks later. it was sent by NASA. The voyagers are still in space today. The voyager 1 has been in space for 36 years 1 month and 25 days from october the 30th 2013. It ways 722 Kg. The speed is 62,136 Km/h
Voyager 1 is the first man made object to go into interstellar space. The voyager 1will end in 2025 because it will run out of power because it uses the sun as power.