When it comes to exploring the solar system, we are faced with many options. Naturally, the first thing that comes to mind is the usage of robotic space probes for this task. In fact, NASA has worked diligently on this since the 1970′s by sending various space probes across our solar system. Some of the more famously known space probes include the Voyager series as well as the Pioneer series. These space probes have photographed a lot of places in our solar system ranging from the Moons of Jupiter to the rings of Saturn. Even exotic planets such as Neptune and even Pluto has been photographed by these probes.
Especially when distances of couple hundred AU are concerned (1 AU=distance from the sun to earth); it becomes imperative to send robotic space probes to these locations. Especially after Pluto, Kuiper belt starts and this is a region where many asteroids can be found. Even beyond that region we can find the Oort cloud, which is a spherical cloud that is filled with remnants of particles and ice that was formed before the formation of our solar system. Once you pass these, you enter the heliopause, which is actually considered the boundary of our solar system. After the heliopause, our solar system ends and the interstellar void that is made up of gases begins.
» Read more: Are Robotic Space Probes the Best Way to Explore the Solar System?