who explored the solar system
because they are far away from our solar system
With science.
There are a lot of ways to explore the solar system. Some people, like NASA, see the solar system in stars by the Hubble Telescope satellite. But that satellite only checks the Earth. In order to explore the whole solar system, you must travel to Mars, Jupiter, Saturn, Uranus, and Neptune (Pluto is not considered as a planet in the solar system in this answer). If you want, you can also explore Venus and Mercury. But you cannot land on Mercury, especially on Venus (the hottest planet in the solar system). So now astronomers/astronauts only explore Mars - Neptune.
The solar system is natural.
Other planets other than earth is put in the solar system for humans to explore and do researches on them.
Nothing, m8.
There are 9 planets in our solar system, which is the Milkey way Galexy.
THE "SOLAR SYSTEM" - is composed of the sun and all the bodies that revolve around it!!!!There are man kind of the solar system's of the following:planets moonsasteroidsmeteorscometsBY:NAIF
If we are talking about being off the Earth and in the solar system Yuri Gagarin.
Telescopes are used mostly to explore our solar system.
Robots aren't advanced enough yet but we do use probes, Man will do more when we perfect a faster mode of intersteller travel.
Simpler and cheaper.