Question
During the 1960 s and 1970 s, the Apollo spacecraft took humans to the Moon in three days. Traveling to Mars requires a trip of about 2 astronomical units in total. How long would this trip take, traveling at the same speed as to the Moon?
Step 1
First, we need to find the distance to the Moon in astronomical units (AU). The average distance from Earth to the Moon is about 384,400 km. One astronomical unit (AU) is the average distance from Earth to the Sun, which is about 149,597,870 km. Show more…
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The average distance from Earth to the Moon is $384,400 \mathrm{km}$. In the late 1960 s, astronauts reached the Moon in about 3 days. How fast (on average) must they have been traveling (in kilometers per hour) to cover this distance in this time? Compare this speed to the speed of a jet aircraft $(800 \mathrm{km} / \mathrm{h})$.
During an Apollo lunar landing mission, the command module continued to orbit the Moon at an altitude of about 100 $\mathrm{km} .$ How long did it take to go around the Moon once?
During an $Apollo$ lunar landing mission, the command module continued to orbit the Moon at an altitude of about 100 km. How long did it take to go around the Moon once?
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