Star A and Star B are both 5 pc away, but Star A is at your zenith and Star B is at your nadir. How much more flux does Earth receive from Star A relative to Star B? Assume there are no interstellar clouds between you and each star

Solve the following problem: Two stars, named A and B, each with a mass equal to the Sun's mass are in orbit around each other. If the distance between the two stars is 1.0 AU. What is the period of their orbit? Describe each step in solving the problem:

What is the apparent magnitude of the sun as seen from Saturn about 10 AU away? Appear to magnitude of Saturn =

Star 1 and star 2 have the same V-magnitude, V = 7.5. However, they have different B-magnitudes, B1 = 7.2 and B2 = 8.5. What is the flux ratio, f1/f2, in the B-band?

Could you find the Mass of the Sun using the slope of the of T2 versus a3, using the values that are in units of years and AU? Explain

1:Which star has been redshifted the most? 2:Which star is moving towards us the fastest? Star C Star D Star A Star B   3:The wavelength of this spectral feature is measured to be 600nm in the lab, and 609 in Star A.  What is the radial velocity of Star A? using km/s,

Read this main idea: The sun is the center of our solar system. Choose three details that go with the main idea. The sun's gravity holds the planets in place. It provides them with heat and light. The largest stars, called supergiants, are 1,500 times bigger than our sun. It takes Earth 365 days to orbit the sun. Jupiter takes 12 years! Our sun is not the largest or hottest star. It is a medium sized yellow star. Radio telescopes use radio waves to show stars in great detail. Astronomers long ago and today use star charts to map star locations. All of the planets in our solar system revolve around one star-our sun. Stars can be blue, white, yellow, or red. Blue stars are the hottest. A reflector telescope bounces star light through mirrors.

In class we found an expression for the 'garden hose angle', ψ, and showed it had a typical value close to 45° (or 225°) near 1 AU.   How would we expect this angle to change for very slow solar wind speeds?  Choose the best answer below: A. ψ → 0° B. ψ → 90° C. ψ → 180° D. Not enough information provided

B6

Calculate by how many times Betelgeuse is brighter than the Sun, if its parallax is 0.006 arcsec, and its apparent magnitude is m = +.5. Can you first use the parallax to calculate the distance and then use the magnitude-distance formula to find the absolute magnitude of Betelgeuse and finally, compare it to the absolute magnitude of the Sun which is -26,74 because other experts used other methods and the answer was not correct.