To an Astronomer,what Is a "Standard Candle

question 121

Multiple Choice

To an astronomer,what is a "standard candle"?

• A) A standard light source that can be placed in a telescope,to which the brightness of stars and other objects can be compared
• B) Any type of object whose absolute magnitude is known
• C) Any galaxy whose redshift has been measured accurately
• D) An accurately defined brightness scale for stars and galaxies,such as the magnitude scale

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Definitions:

Clockwise

Moving in the direction of the hands of a clock; typically rightward from the top.

Responding Verbally

Involves the use of spoken words or language to express or convey a reaction or answer to a stimulus.

Mnemonic Method

A technique used to improve memory by associating new information with known patterns, images, phrases, or ideas.

Visualizing

The process of forming mental visual images.