Answer to Question 1
They were the first spacecraft to soft land on the planet and send images of the surface back to Earth.
Answer to Question 2
Uranus passed in front of a star, and the star's light fluctuated before and after the occultation. These rapid changes were mapped by photoelectric photometry to map the rings. Later observations found them brighter in the infrared, for as the dark material absorbs sunlight, the absorbed energy heats up the rings particles to the point that in the infrared, they are hotter than the planet's surface clouds.
Successful agriculturalists must have a basic understanding of landscape structure and process. Thes
Sharing patient information with colleagues is an important nursing role
Rosetta is the first spacecraft to rendezvous with a comet
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