Alpha Centauri Is Not Only the Closest Star System to Us

question 51

Multiple Choice

Alpha Centauri is not only the closest star system to us (it is actually a triple star system) but it also seems to be an excellent place to look for extra-terrestrial life.It is about 4.3 light-years away from Earth.If an astronaut claims her journey there and back only took 6.3 years,then how fast was she traveling? (Assume she made a fast turnaround once she arrived there!)

• A)0.65c
• B)0.73c
• C)0.86c
• D)0.81c
• E)0.54c

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Definitions:

America First Committee

An isolationist group that opposed American intervention in World War II prior to the attack on Pearl Harbor, advocating for the United States to prioritize domestic issues over international conflict.

Charles Lindbergh

An American aviator who became famous for making the first solo nonstop flight across the Atlantic Ocean in 1927, aboard the Spirit of St. Louis.

Lend Lease Program

A program initiated by the United States during World War II that allowed the U.S. to provide its allies with food, oil, and material without immediate payment in order to help defeat the Axis powers.

Battle of Britain

A major World War II air campaign fought primarily between the Royal Air Force of Great Britain and the Luftwaffe of Nazi Germany in 1940.