rings around Uranus were discovered by means of
A photography from a high altitude observatory on Earth
B photography from spacecraft
C observations of stellar occultations
D theoretical prediction
the ring system around Uranus was originally discovered by what observing technique?
A observation by the cameras on board the voyager 1 spacecraft
B radar reflection from the particles in the rings
C occultation of light from a star as Uranus (and the rings) passed in front of it
D infrared observation from the IRAS spacecraft in Earth orbit
what scientific method was used to discover the rings around Uranus?
A direct photography from Earth
B occultation of a star as planet and rings moved in front of it
C spacecraft exploration of the planet
D x-ray photography from space
the rings of Uranus are difficult to see because
A Uranus is so far from the sun
B the rings have a low albedo
C the rings are thinner than those of Saturn
D all of the above
a moon which shows evidence of being shattered and re-formed recently is
A mimas
B triton
C Miranda
D hyperion
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