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Problem 8: The planet HD209458b, now known as Osiris, was discovered by astronomers in
1999 and is at a distance of 150 light-years (1 light-year = 9.2 x 10¹2 kilometers). If an
interstellar probe were sent to investigate this world up close, traveling at a maximum speed of
700 km/sec (about 10 times faster than our fastest spacecraft: Helios-1), how long would it
take to reach Osiris?
Sagot :
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