A planet orbits a star in a planetary system, and it takes 8.0 Earth years for the planet to
complete one revolution. If the mass of the star
is about the same as the mass of the Sun, and
the mass of the planet is the same as the mass
of Earth, the semi-major axis of the planet's
orbit is:

Which of the following is a source of heat for magma formation? magma plumes in the continental crust friction due to divergence friction due to subduction magma plumes in the oceanic crust

Which of the following is an example of units for speed

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?