A. More than a trillion stars can be observed by the Hubble Space Telescope.
B. Some stars have absolute magnitude and some have only an apparent magnitude.
C. A light year is the distance light travels in a year.
D. Some planets have a greater apparent magnitude than the brightest stars.
2006-10-09 16:01:51 · 5 answers · asked by heba m 1 in Science & Mathematics ➔ Earth Sciences & Geology
A is true because Hubble is amazing.
C is true.
D is true. Venus is brighter than most stars in the sky.
Absolute magnitude is a function of apparent magnitude and luminosity distance.
M = m -5(log10 * DL -1)
2006-10-09 16:09:55 · answer #1 · answered by Professor 3 · 0⤊ 0⤋
B is not correct. Every star has both an apparent and an absolute magnitude.
2006-10-09 23:04:25 · answer #2 · answered by Anonymous · 0⤊ 0⤋
B. ALL stars have BOTH apparent and absolute magnitude.
2006-10-09 23:05:04 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Are these test questions being asked by the same person or several different people from the same class? And do you know that there is a separate astronomy section where these questions would fit better?
2006-10-09 23:22:02 · answer #4 · answered by kris 6 · 0⤊ 0⤋
b
2006-10-09 23:09:09 · answer #5 · answered by hamiefever4ever 2 · 0⤊ 0⤋