We left more than an American flag behind on the Moon…. nothing really surprising, but there’s more there than you might expect.
While all the attention is focused on Saturn, those little Mars rovers just keep on chugging along.
And in the category of really forgotten space things, Voyager I is now 8,330,000,000 miles from Earth, or about 90 Astronomical Units (the AU is the mean distance from the Earth to the Sun). Pioneer 10 has been traveling in space longer than Voyager I, but Voyager is traveling faster, and exceeded Pioner 10 in distance a few years ago. We are still in contact with Voyager, barely, but Pioneer went out of contact in April of 2002. Still, 30 years of transmitting back to Earth wasn’t a bad feat.