An extremely massive O-type star found directly in between two spiral arms of a

Question

An extremely massive O-type star found directly in between two spiral arms of a velocity. At the velocity it is moving it would take 10 million years to the star to move the distance from the spiral arm to its current cost on. If this massive O-star uses up its fuel in 5 million years, explain how it managed to get to this position in the galaxy. A molecular cloud collided with the spiral density wave compressing the leading edge of the molecular cloud, setting off star formation. In this collision stars of all masses are formed, including high mass O-stars. The large number of high luminosity, O-star in the spiral arms is the reason why we can see prominent spiral arms. In between the arms the O-stars have all died and there isn't as much luminosity in this region. Therefore, it is not possible for the O-star to be located n between spiral arms. A molecular cloud collided with the spiral density wave compressing the leading edge of the molecular cloud, setting off star formation. As the cloud passes through the spiral arm in one direction, the spiral arms are moving at nearly the same speed in the other direction. After 5 million years the distance between the spiral arm and the O-star is the same as if the spiral arms weren't moving and the O-star lived 10 million years. A molecular cloud collided with the spiral density wave compressing the leading edge of the molecular cloud, setting off star formation. Stars in orbit around a galaxy are moving at nearly the speed of light. This means relativity is important and the star's clock runs slow. This a lows the star to travel much farther than we would normally expect because our clocks read 10 million years, while the star's clock reads 5 million years. A molecular cloud collided with the spiral density wave compressing the leading edge of the molecular cloud, setting off star formation. As the cloud continues on through the arm, high mass stars that formed from the compression, drive gas and dust deeper into the cloud via stellar winds and radiation. Some explode as supernovae and send further shock waves into the cloud. This compresses parts of the remaining cloud and new stars form. This self-sustained star formation continues for 2 or 3 generations until the O-star forms in between the spiral arms.

Explanation / Answer

A star of spectral type O lives approximately 1 million years on the main sequence.O-type stars are typically located in regions of active star formation, such as the spiral arms of a spiral galaxy.

Answer is option D

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