Sometimes you see things that make the hairs on the back of your neck stand up.
The Deep Impact spacecraft, with it’s original mission complete and now undertaking science under the EPOXI moniker, turned it’s cameras back towards the Earth from 50 million kilometers away and over the course of several hours caught The Moon transiting The Earth!
Phil Plait sums it up beautifully:
While there is science galore in these animations, I think their real impact is the visceral one from simply seeing them. As Carl Sagan once said: everyone you have ever met, every human who has lived and died, lived out their lives on that blue ball. And yet here we are, in the 21st century, plains apes allowed to evolve and satiate their curiosity, now with the ability to lob metal proxies into deep space, look back, and see ourselves.
Science. I love this stuff.