How Does the Theory of Planetary Migration in Disks Possibly

question 22

Multiple Choice

How does the theory of planetary migration in disks possibly account for the highly eccentric orbits discovered for some extrasolar planets?

• A)When migrating planets pass close enough for a gravitational encounter, one may be flung from the system while the other is shifted to a highly elliptical orbit.
• B)When migrating planets collide, they would move onto more eccentric orbits.
• C)When a planet migrates onto the surface of the star, the additional stellar mass would disrupt the orbits of the remaining planets.
• D)A migrating planet would create waves in the planet forming disk, which would in turn lead to the formation of planets on highly elliptical orbits.

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Definitions:

Homeostasis

The tendency of a biological system to maintain stability while adjusting to conditions that are optimal for survival.

Multitasking

The ability to perform multiple tasks simultaneously or switch between tasks quickly.

Simultaneously

Occurring, operating, or done at the same time.

Mainstream Media

Outlets of mass communication that reach a large audience, including television, newspapers, and radio, which often set the agenda for public discourse.