There is no way we have the technology to explore outside the solar system. The advancements made in the past 40 years do not come anywhere close to what is needed to be intersolar explorers. We can hardly explore our own solar system, let alone other star systems.
The nearest star is 4.3 light years away. Speed of light is 299,792.5 km/sec. Voyager 1 is traveling at 17 km/sec, this is 0.005671% the speed of light. This is the fastest man made object, and it is a fraction of a fraction of the speed needed to explore other worlds.
It will take Voyager over 80,000 years to travel 4 light years.
I think it is nearly impossible for us to understand how large the universe is. We can quote numbers, but we have absolutely no frame of reference. It is nearly impossible for the general public to understand how large our solar system is. I think this has a lot to do with how the planets are lined up in science class, all nice and neat.
http://www.troybrophy.com/projects/solarsystem/