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Transcript
Name: _________________________________________ Period: __________ Uranus and Neptune The Discovery of Uranus Discovered in 1781 by William ________________; first planet to be discovered in more than 2000 years First planet discovered by a ___________________ The Discovery of Neptune Neptune was discovered in 1846, by Urbain ___________________. Analysis of Uranus’s orbit indicated Neptune’s presence. First planet discovered by ___________________. Confirmed _________________________________________________________ Physical Properties of Uranus and Neptune Uranus and Neptune are very similar: Uranus Neptune Mass Radius Density Peculiarity of Uranus: axis of ___________________lies almost in the plane of its orbit. ___________________variations are extreme. Outer atmospheres of Uranus and Neptune are similar to those of Jupiter and Saturn Uranus and Neptune are cold enough that ___________________freezes; ___________________dominates and gives the characteristic blue color Uranus is very ___________________; clouds only in lower, ___________________layers. Few features are visible ___________________structure of Neptune is more visible, and Neptune has internal ______________________________of unknown origin Neptune has storm systems similar to those on Jupiter, but ___________________ Gas Giants Page 1 Name: _________________________________________ Period: __________ Uranus and Neptune Magnetospheres and Internal Structure Uranus and Neptune both have substantial ___________________fields, but at a large angle to their rotation axes. The rectangle within each planet shows a bar magnet that would produce a similar field. Note that both Uranus’s and Neptune’s are significantly ______________________________________. Magnetic fields of Uranus and Neptune may not be produced by ___________________, as the other planets’ fields are. Interior structure of Uranus and Neptune, compared to that of Jupiter and Saturn: The Moon System of Uranus Uranus has ___________________moons, five of which are major: Miranda, Ariel, Umbriel, Titania, and Oberon Very similar to Saturn’s medium-sized moons, except that all are much less ___________________. Umbriel is the darkest ___________________is the most unusual; origin of the cracks and grooves is unknown: The Moon System of Neptune Neptune has _________moons, but only two can be seen from Earth: ___________________and Nereid Triton is in a ___________________orbit; Nereid’s is highly ___________________ Triton’s surface has few craters, indicating an ___________________surface ___________________geysers have been observed on Triton, contributing to the surface features: Also, there appear to be ice ___________________ Gas Giants Page 2 Name: _________________________________________ Period: __________ Uranus and Neptune The Rings of the Outermost Planets Uranus and Neptune have ___________________ring systems, recently detected. Uranus’s rings are ___________________ Two ___________________moons keep the epsilon ring from diffusing: Neptune has ___________________rings, three narrow and two wide: Summary • Uranus, Neptune, were discovered in the last ___________________ • Uranus and Neptune are similar: ___________________and ___________________ • Uranus’s ______________________________________is almost in the plane of its orbit • Surface features are hard to discern on ___________________, but more obvious on ___________________ • Uranus has no excess ___________________emission, but Neptune does • Uranus’s ___________________moons are similar to those of Saturn • Neptune’s moon Triton has a ___________________orbit • Uranus and Neptune both have ___________________ring systems Planet Mass (x Earth) Radius (x Earth) Density Orbital Period Number of moons Rings? Jupiter Saturn Uranus Neptune Gas Giants Page 3 Moon Planet it orbits Name: _________________________________________ Period: __________ Uranus and Neptune Size (small, medium, large) Known for…? Io Europa Gannymede Callisto Titan Enceledus Rhea Dione Tethys Mimas Iapatus Miranda Umbrial Triton Gas Giants Page 4 Name: _________________________________________ Period: __________ Uranus and Neptune Gas Giants Page 5