A red giant loses a solar mass in 150,000 years via a superwind. After 0.9 million years, it has a mass of 9.5MSun. What was its original mass? (Give your answer in terms of MSun.)
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A red giant loses a solar mass in 150,000 years via a superwind. After 0.9 million years, it has a mass of 9.5MSun. What was its original mass? (Give your answer in terms of MSun.)
A planetary nebula expands at 38 km/s. How far will it expand (in km) in 3 million years?
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A planetary nebula expands at 38 km/s. How far will it expand (in km) in 3 million years?
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