Two Stars Have the Exact Same Luminosity, but Star Y

question 11

Multiple Choice

Two stars have the exact same luminosity, but star Y is four times dimmer looking that star X. This means that

• A) star Y is four times as far away as star X
• B) star Y is 16 times as far away as star X
• C) star Y is half as far away as star X
• D) star Y is twice as far away as star X
• E) we can't figure out the relative distance of the two stars from the information given

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Definitions:

Echinoderms

A phylum of marine animals including starfish, sea urchins, and sea cucumbers, characterized by radial symmetry and a water vascular system.

Digestive System

A collection of organs that breaks down food into nutrients, which the body uses for energy, growth, and cell repair.

Subphylum Urochordata

A subphylum of chordates that includes marine animals known as tunicates or sea squirts, having a notochord only during their larval stage.

Phylum Echinodermata

A group of marine animals characterized by radially symmetrical body plans, a water vascular system, and a calcified skin, including stars, sea urchins, and cucumbers.