The Surface Temperature of a Nearby Star Can Be Determined

question 65

Multiple Choice

The surface temperature of a nearby star can be determined MOST precisely by measuring what parameters?

• A) position of the star on the H-R diagram
• B) Doppler shift of the star's spectral lines
• C) relative strengths of emission lines from different atoms and ions in the star's spectrum
• D) relative strengths of absorption lines from different atoms (e.g., H, Ca) and molecules (e.g., TiO) in the star's spectrum

---

Definitions:

Superior Oblique

A cranial muscle that originates from the sphenoid bone and inserts onto the outer surface of the eye, contributing to downward and outward movements of the eye.

Superior Rectus

A muscle in the eye that controls upward eye movement and is one of the six extraocular muscles.

Inferior Rectus

A muscle in the eye that is responsible for downward eye movement.

Coracobrachialis

A muscle in the shoulder that assists in flexing and adducting the arm at the shoulder joint.