If You Found an Exoplanet Whose Mass Was the Same

question 72

Multiple Choice

If you found an exoplanet whose mass was the same as Jupiter's,but the planet orbited its star with a period of 2 years and a semimajor axis of 1 AU,what would be the mass of its star? For reference,Jupiter has a semimajor axis of 5.4 AU and an orbital period of 12 years.

• A)0.25 M_⨀
• B)0.5 M_⨀
• C)2.0 M_⨀
• D)1.5 M_⨀
• E)not enough information available to answer

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Definitions:

Developmental Level

The stage of growth or progression in physical, emotional, intellectual, or social development typical for a certain age or group.

Superego

In psychoanalytic theory, the part of the personality responsible for the internalization of societal and parental standards of conduct, operating on the morality principle.

Fixation

According to Freud, a condition in which the id, ego, and superego do not mature properly and are frozen at an early stage of development.

Libido

The sexual energy that fuels the id.