We Don’t Know Neptune at All
You don’t really hear about Neptune, do you?Not as often as the other planets, certainly. Space robots regularly provide snapshots of the surface of Mars and the clouds of Jupiter. Mercury is a frequent scapegoat for astrology-minded folks having a bad day (even though Mercury being in retrograde is actually just an optical illusion in our night sky). For 13 whole years, the Cassini spacecraft orbited Saturn before plunging into the planet, ending its glorious streak of observations.























