Why does Callisto take the longest to orbit Jupiter?
Callisto’s rotation is tidally locked to its orbit around Jupiter, so that the same hemisphere always faces inward. Because of this, there is a sub-Jovian point on Callisto’s surface, from which Jupiter would appear to hang directly overhead.
Why does Callisto occasionally appear to be closer to Jupiter than Europa?
Fig. 1 shows the outermost satellite, Callisto, appearing all over the place. This happens because Callisto’s orbital period of 16.689 days is somewhat more than two weeks; thus observations at weekly intervals find Callisto appearing on more or less opposite sides of Jupiter. Fig.
What causes synchronous rotation of the Galilean moons as they orbit about Jupiter?
Io’s activity is generated by heat deep inside its center. The force needed to keep Io in synchronous rotation with Jupiter creates bulges on Io just like the Moon creates the ocean tides on Earth. Click to learn more about synchronous rotation and tidal heating.
Why is Callisto The Galilean moon furthest from Jupiter not fully differentiated?
Like our own Moon, Callisto rotates in the same period as it revolves, so it always keeps the same face toward Jupiter. Callisto’s day thus equals its month: 17 days. Unlike the worlds we have studied so far, Callisto has not fully differentiated (separated into layers of different density materials).
What are the 4 Galilean moons?
A comparison “portrait” of Jupiter’s four Galilean moons Io, Europa, Gany- mede, and Callisto, each with different characteristics.
What is the least livable planet?
Earth is the only planet in our solar system’s habitable zone. Mercury and Venus are not in the habitable zone because they are too close to the Sun to harbor liquid water. However, evidence suggests that the Sun used to be much dimmer.
What kills you in space?
Before they froze, they would most likely die from asphyxiation or decompression. 10 seconds of exposure to the vacuum of space would force the water in their skin and blood to vaporize, while their body expanded outward like a balloon being filled with air.