A Red Giant Star Is Found to Be Orbiting an Unseen

question 76

Multiple Choice

A red giant star is found to be orbiting an unseen object with a short orbital period.By measuring the speed at which it orbits,astronomers deduce that the object has a mass of 10M_⨀ This object is probably a __________ because __________.

• A)black hole;the giant star is massive and could only be in orbit about something even more massive
• B)black hole;its mass is too large to be a neutron star or a white dwarf
• C)neutron star;any supernova that would have made a black hole would have destroyed the red giant
• D)M-dwarf star;only such stars would be faint enough to go unseen in this system
• E)black hole;most red giants orbit neutron stars,and neutron stars can turn into black holes

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Definitions:

Rejection

The act of refusing to accept, submit to, believe, or make use of something or someone.

Universality of Emotions

The theory that certain emotions are experienced and recognized in similar ways by people across different cultures.

Ekman's Research

Pertains to the study of facial expressions, identifying universal emotions across cultures by psychologist Paul Ekman.

Investigators

Individuals who carry out a formal inquiry or systematic study, often used in the context of police, scientific, or academic research.