These are emotional pictures for me, but perhaps not for all of you:
I have no particular opinions about this picture. It's just the only picture that, upon first seeing it on an ad against war in the city, actually caused me to do a double take. It's just interesting how much emotion you can see in this woman. Interesting. (It's also interesting to see how uninterested the little girl appears)
This is an artist's rendering of what it looks like at the edge of one of Titan's lakes. For those of you who don't know, Titan is one of Saturn's moons, with a full atmosphere and weather system, except the compound that exists in all three states is methane instead of H20. So there's rain, lakes, clouds, etc with methane. If life exists here, it would be completely different from what we know, but it could theoretically thrive on methane the way we thrive on water. NASA nearly sent a boat there (TiME) but ended up choosing to fund another project to Mars. It's just fascinating, the possibilities of life as well as the eery similarity of Titan to our planet.
Most of you have probably seen this, the Cosmic Microwave Background. It's just fantastic and beautiful. The CMB is actually the most uniform black-body we have ever seen. It's INCREDIBLY uniform, and would be absolutely uniform were it not for quantum physics. The extremely minuscule quantum interactions of these particles is what made the very exaggerated differences in temperature that you see in this map of the CMB over the whole universe. Those small fluctuations, after the expansion of the universe, are what made pockets of more matter-filled and less matter-filled areas in the universe. This eventually led to the galaxy clusters we see today. In other words, were it not for these incredibly minuscule quantum fluctuations and interactions in the early universe, the universe now would be completely uniform, and nothing would exist. You are, in a way, looking at an early rough map of the universe today. I love this picture.
This estimate of the universe shape is possible because of our detection of the CMB.