Famous solar orbiters

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Across
  1. 2. our solar system’s more than 150 known moons, is this is the only one with a substantial atmosphere. And of all the places in the solar system, this is the only place besides Earth known to have liquids in the form of rivers, lakes and seas on its surface.
  2. 4. this is a bit larger satellite than its "younger sibling", and orbits only 3,700 miles (6,000 kilometers) above the Martian surface
  3. 6. this is the largest of Pluto's five moons, it was discovered 40 years ago in June 1978 by James Christy and Robert Harrington at the U.S. Naval Observatory in Flagstaff, Arizona―only about six miles from where Pluto itself was discovered at Lowell Observatory. They weren't even looking for moons. They were trying to refine Pluto's orbit around the Sun.
  4. 7. a Jupiter's orb that may be the most promising place in our solar system to find present-day environments suitable for some form of life beyond Earth
  5. 9. the gravitational attraction that masses have for one another decreases inversely with the square of the distance of those masses from each other. As a result, Moon the slightly greater attraction that this satellite has for the side of Earth closest to it, as compared to the part of the Earth opposite it, results in tidal forces. Tidal forces affect both the Earth's crust and oceans.
  6. 10. A handful of worlds are thought to have liquid water oceans beneath their frozen shell, but this one sprays its ocean out into space where a spacecraft can sample it.
  7. 11. this Jupiter's satellite is the most volcanically active world in the Solar System
Down
  1. 1. are unique in being named for Shakespearean characters, along with a couple of the moons being named for characters from the works of Alexander Pope.
  2. 3. We don't know with what beverage William Lassell may have celebrated his discovery of this Neptune moon, but beer made it possible. Lassell was one of 19th century England's grand amateur astronomers, using the fortune he made in the brewery business to finance his telescopes. He spotted This one on Oct. 10, 1846―just 17 days after a Berlin observatory discovered Neptune.
  3. 5. its name means dread, and it is the sibling of Phobos.
  4. 6. this is Jupiter’s second largest moon and the third largest moon in our solar system. Its surface is the most heavily cratered of any object in our solar system.
  5. 8. this Jupiter’s icy moon is the largest moon in our solar system, even bigger than the planet Mercury, and the dwarf planet Pluto