How many light years are in one parsec? (Use at least two significant figures)

The radius of the Earth is 6,400 km. What speed and direction would you have to travel along the equator to make the sun appear fixed in the sky is most nearly which of the following?

Find the distance in parsecs to Proxima Centauri, which has an annual parallax of 0.772 arcsec.

Given the location of Springfield, IL is 40N and 90W, answer the following questions.  You must explain your answer to each question When Springfield’s day light time is about 9 hours, what is the Sun-angle in Springfield?  Use your calculation to explain your answer

On February 28, 2010, Earth was equidistant from the spacecraft Dawn and the Sun, forming an isosceles triangle. The distance from Earth to Dawn and Earth to the Sun was 0.99 AU (astronomical units). The distance from Dawn to the Sun was 1.84 AU. a) Draw a diagram to show Dawn, Earth, and the Sun. b) Determine the angle between the sight lines from Earth to Dawn and the Sun.

The right ascension and declination of the seven stars of the Big Dipper are given below: Star Right Ascension Declination Alkaid 13h48m +49° 19' Mizar 13h24m +54°56' Alioth 12h54m +55°58' 12h15m +57°02' 11h54m +53°42' Merak 11h02m +56°23' Dubhe 11h04m +61°45' (1) For what range of latitude are all the stars of the Big Dipper circumpolar? Megrez Phecda

What is a variable magnitude?

What would the angle between the Sun and the Earth be if the solar system were viewed from a distance of 1 pc?

Is wanting one answer which is to calculate the magnitude A-2B

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.