In the past few decades an uncountable fleet of satellites and and space probes have left Earth to visit every destination in the solar system. Here's what they found.
The night sky is a time machine. The further we look out into the universe, the further back in time we reach. What we see in the night sky is only a small percentage of the contents of the Universe, most is dark matter and dark energy. We know it exists; however, its nature eludes us for the moment.