<span>B. valve cover. is the answer</span>
2.moons of Jupiter
Explanation:
- In the early evening Galileo Galileo observing Jupiter finds in its vicinity three stars: two east and one west of the planet.
- The next evening he noticed that Jupiter had moved and that all three stars were west of the planet.
- The they after it was overcast and Galileo was observing Jupiter again. Two tiny stars were now standing east of Jupiter.
- Galileo realized that the stars were in fact three Jupiter satellites.
- He later also discovered the fourth satellite of Jupiter.
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Fun fact:
Glaciers and ice sheets hold about 69 percent of the world's freshwater.
