Imagine you're going about your day, and then you suddenly become mesmerized by a bright, glowing orb. "What is this magical sphere?" you wonder. Suddenly, you hear a nearby person scream out, "Look! It's Callist...", but unfortunately they are struck by lightning before completing the last syllable. So close! What are you going to do? How are you going to be able to determine what you are gazing at without this last little piece of information? Is it Callisto, Jupiter's third-largest moon, or is it Callista, Newt Gingrich's third wife? Some of these tips may help:
- Is the sphere you're viewing orbiting the planet Jupiter? If yes, then it's Callisto.
- Is its orbital period about 16.7 Earth days? It's Callisto. Callista no longer has orbital periods.
- Is its diameter roughly 27 inches? That's Callista.
- Does it feature one of our solar system's most heavily cratered surfaces? Again, it's Callisto. The surface of Callista is unnaturally smooth.
- Take a look around. Is there a mobile hairdo command center nearby? It's Ms. Gingrich.
- Is it composed of more-or-less equal parts of rocky material and water ice with some additional volatile ices such as ammonia? You'll need more information; this could go either way.