Sagittarius A*, the Radio Source Located at the Center of Our

question 97

Multiple Choice

Sagittarius A*, the radio source located at the center of our galaxy, is thought to be a

• A) massive star cluster.
• B) supernova remnant.
• C) quasar.
• D) Seyfert nucleus.
• E) supermassive black hole.

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Definitions:

Winning Percent

The ratio of wins to total games or matches played, typically expressed as a percentage.

Senatorial Election

An electoral process in which citizens vote to elect representatives to the Senate, the upper chamber of the legislature in some countries.

Confidence Interval

An interval of values, obtained from statistics of a sample, anticipated to envelop the value of a not yet identified parameter of the population.

Proportion Difference

A measure of the difference in proportions or percentages between two groups in comparative studies.