Help with Earth and Space Homework?

Question

A star might be much brighter than it appears to be. This is called the star's absolute magnitude. The difference in apparent magnitude and absolute magnitude is due primarily to the star's -

A- surface temperature
B- motion through universe
C- diameter
D- distance from earth

Answer 1

D

Answer 2

First of all, this is a horribly worded question, and you can tell your teacher I said so (and you can tell him I have a college degree in physics). How can something be "brighter than it appears to be"?? A star's absolute magnitude is defined as the magnitude (brightness) it would appear to have if you were 10 parsecs (about 33 light years) away from it. So I think what your teacher meant to say was: If you put yourself 33 LY away from a star, it might have a brighter apparent magnitude (i.e. would "look" brighter) than it does when seen from earth. But that sort of gives away the answer: D.

Answer 3

I dont think its b for sure! But "A" makes sense. I dont think it can be c because usually the larger the sun is (like red giants for example) the older it is, which actually produces a lower tint of white which turns to yellow then orange and eventually to red. This statement also supports "A" because the older the sun is, the lower the surface temperature! D would also make sense because the farther away something is, the dimmer it seems! Well anyway you should look up the star's absolute magnitude on google or something, good lucky!

Answer 4

it's d because if you wanna explain to yuor teacher the farther away a star is from earth,, the dimmer the light is
im still in school and this is easy stuff lol

Answer 5

D...distance from earth.

Answer 6

d distance from earth ....

Answer 7

D

Answer 8

D