7. This is what it looks like when planets form around a star.
ALMA (NRAO/ESO/NAOJ); C. Brogan, B. Saxton (NRAO/AUI/NSF)
The orange disk that surrounds the star it is made up of dust and gas. The dark bands in the image are where the gas and dust has been swept up by newly formed planet.
8. This picture shows the sun reflecting off the sea on Saturn’s moon Titan.
NASA/JPL-Caltech/University of Arizona/University of Idaho / Via jpl.nasa.gov
Yes, some moons have seas.
9. This is what Saturn looks like from the other side, with the sun behind it.
The map is made up of pictures taken in 2000 by the Cassini spacecraft.
15. There’s a volcanic region on Jupiter’s moon Io and this is what it looks like when it erupts.
NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute / Via photojournal.jpl.nasa.gov
This five-frame sequence was taken over eight minutes.
16. This is a tiny patch of the sky, and every speck of light in this image is a galaxy.
NASA, ESA, G. Illingworth, D. Magee, and P. Oesch (University of California, Santa Cruz), R. Bouwens (Leiden University), and the HUDF09 Team / Via hubblesite.org
(Apart from a few, which are stars – you can tell those apart because there are little spikes of light radiating from them.)
17. This is what a spiral galaxy looks like side on.