Which of the Following Terms Is Given to a Pair

question 67

Multiple Choice

Which of the following terms is given to a pair of stars that we can determine are orbiting each other only by measuring their periodic Doppler shifts?

• A)eclipsing binary
• B)spectroscopic binary
• C)visual binary
• D)double star

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Definitions:

Model

A simplified representation of a system or phenomenon, often used in scientific research or to demonstrate complex processes in a comprehensible manner.

Al-Qaeda

An international Islamist extremist terror organization responsible for numerous attacks around the world, including the September 11 attacks in the United States.

ISIS

An extremist militant group that proclaimed itself a worldwide caliphate, known for committing severe acts of terrorism.

Pluralism

Is the retention of racial and ethnic culture combined with equal access to basic social resources.