Question

question: which two factors are used to quickly classify a newly discovered star based on the hertzsprung-russell diagram? answer options: select one of four radiance and fusion rate temperature and luminosity luminosity and radiance radiance and temperature

Explanation:

The Hertzsprung - Russell (HR) diagram is a key tool in astronomy (a subfield of Natural Science, specifically Physics - Astrophysics). The HR diagram plots stars based on two main factors: temperature (or spectral class, which is related to temperature) on the x - axis and luminosity (or absolute magnitude, related to the star's brightness) on the y - axis. Radiance is not a primary factor for classifying stars on the HR diagram, and fusion rate is not used for the basic classification via the HR diagram. So the correct factors are temperature and luminosity.

Answer:

B. Temperature and luminosity