Elon Musk @elonmusk
@Erdayastronaut @BocaChicaGal @NASASpaceflight Everything is compressible, but liquid compression at these pressures is not significant. However, the tanks do expand under pressure, creating a bit more volume. Keeping propellant super cold has a big effect on density of ~10% in case of CH4. — PolitiTweet.org