Question

Consider a relatively nearby, single star, that is, a star that is not a member of a binary system and has no known orbiting planets. Listed below are a few properties of this star. Classify each property as either something that we can observe or measure directly (with the aid of a telescope and instruments such as cameras or spectrographs) or something that we must infer indirectly (and hence is correct only if all of our assumptions are correct).a. colorb. parallax angle

c spectral typed. apparent brightness
e. luminosity
f. surface temperature
g. mass
h. radius

Answer 1

THINGS THAT CAN BE OBSERVED FROM THE USE OF TELESCOPE AND OTHER INSTRUMENTS INCLUDES

- color

- parallax angle

- spectral type

- apparent brightness

THINGS WE MUST INFER INDIRECTLY INCLUDES

- luminosity

- surface temperature

- mass

- radius