What is the angular separation angle q between the two stars?
• [5] (You need a star chart to answer this one) For a person standing on Mars north of the equator, at night, the following prescription for finding north may be given: “No star marks the north pole of the sky on Mars, but the position of that pole may be estimated as follows. Look for the 5 bright stars which mark the constellation of Cygnus, the swan. They form a cross–sometimes known as the “Northern Cross.” Locate the center of the cross, and go from there to the top of the cross–the brightest star in Cygnus, known as Deneb. Follow that line a distance equal to the distance between the center of the cross and Deneb: the point you have reached is close to the pole of the heavens.” Question: What are the declination and right ascension of that point of the heavens (give both in degrees), and what is its connection to Mars? • [6] A satellite in synchronous Earth orbit (like most communication satellites) orbits the Earth’s equator in a circular orbit which always keeps it above the
