(a) Use powers of G and c to convert 1 M. to a unit of time and give its value in SI units. (b) Combine powers of G and c to form a constant with dimensions of luminosity and
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- Calculate the number of miles in a light-year, using 1.86 105 mi/s as the speed of light. (Hint: The number of seconds in a year, 365 days, will be useful.) Answer in mi/yCompute the distance to the following stars using the luminosity-distance relationship: m-M=5 log (d) - 5 Name: X Ari App. Mag. (m): 9.95 Abs. Mag. (M): 0.75 O 693.23 690.43 692.56 691.83(a) The figure shows the three stars and their velocities. Which star has the largest proper motion? Which star has the smallest proper motion? A B Earth
- answer for 33- Consider a binary star system in which the two stars are seen to be 1.50" apart. Determine the actual physical separation of those stars (in AU) if this binary system is located 9.50 1.y. from us.31) Star Sirius has an apparent magnitude of -1.47 and an absolute magnitude of 1.41. Estimate the distance to Sirius.
- Calculate the number of miles in a light year using (see picture for the equation) mi/s as the speed. Hint: The number of seconds in a year,365days,will be useful.-According to appendix C: radius of the sun is 7 x 10^8 mWhat is the right ascension in hours, minutes, and seconds of a star at RA 239.768°?