How Do Astronomers Determine the Distance to Stars That Are

question 8

Multiple Choice

How do astronomers determine the distance to stars that are farther than 100 parsecs away?

• A) measuring the shift of the stellar parallax
• B) estimating a star's spectral type and comparing it to the spectroscopic parallax
• C) subtracting absolute from apparent magnitudes
• D) using trigonometry in the triangulation method
• E) measuring the proper motion of a star

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Definitions:

Half-Life

The time required for a quantity to reduce to half its initial value, often used in the context of radioactive decay or pharmacokinetics.

Respiratory Passages

The airways in the human body through which air flows in and out of the lungs, including the nose, throat, and bronchi.

Bronchial Elasticity

The ability of the bronchial tubes in the lungs to stretch and return to their original size, important for healthy lung function and air flow.

Emphysema

A chronic lung disease in which scar tissue and mucus obstruct the respiratory passages.