I am damn excited about this. Yesterday (Sept. 12, 2013), NASA announced that Voyager 1 has officially left the heliosphere and entered interstellar space. The crossover occurred August 25th, but it took this long for NASA to verify the finding, and make the announcement. The crossover occurs when the influence of sun is basically over, and so the probe is experiencing space as it exists between stars.
This is historic. This is the first human made object to enter interstellar space, and what’s even more exciting is that this 36 year old probe is still work, sending back data to Earth. We are actually exploring interstellar space. Below is a link to the NASA announcement.
I can’t express how amazing this is for us as a species. We are explorers, and this is a huge step in our accomplishments as explorers. It’s beyond words.