interstellar

In the summer of 1977, NASA launched the Voyager 1 and 2 space probes.  Their original 5-year mission was to study Jupiter and Saturn.  Voyager 2 was actually launched 2 weeks before Voyager 1, but arrived at Jupiter after Voyager 1. Both probes are still functioning today after more than 40 years.

NASA

Some say that we now live in the golden age of solar system exploration.  In 2016 there are more than 15 active, interplanetary probes from the U.S., Europe, Japan, China, India, and Russia.  These are exploring Venus, Mars, Jupiter, Saturn, Earth’s Moon, comets, asteroids, the distant Kuiper Belt, and the even more distant, interstellar medium.