11. [5pt] You can estimate the age of the planetary nebula in image (c) in Figur

Question

11. [5pt] You can estimate the age of the planetary nebula in image (c) in Figure 22.18. The radius of the nebula is 319 times the radius of our own solar system, or about 0.425 light-years. The gas is expanding away from the star at a rate of about 22 miles/s. Considering that distance velocity x time, calculate how long ago the gas left the star if its speed has been constant the whole time. Make sure you use consistent units for time, speed, and distance. Answer in years Answer: Not yet correct, tries 1/5 Submit All Answers Last Answer: 2.98x10A Hint: There are 1609 meters in a mile, 9.461E15 meters in a light year, and 3.154E7 seconds in a year

Explanation / Answer

use,
time taken = distance/speed

= 0.425 light year/ (22 miles/s)

= 0.425*3*10^8*3.154*10^7/(22*1609)

= 1.136*10^11 s

= 1.136*10^11/(3.154*10^7)

= 3.60*10^3 years

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