2. An unknown planet was accidentally discovered by NASA. It has a mean distance of 2.15 E11 meters from the sun. Assuming it has a mass of 6.02 E24 kg, how long (in Earth Years) will it take for the said planet to revolve around the sun?

3. An unknown planet (mass is equal to 4.26 x 10^24 kg) is orbiting around the sun (mass of the sun is equal to 6.623703×1035kg). Knowing that the gravitational force between the unknown planet and the sun is (5.18 x 10^9)N, is the unknown planet nearer or farther to the sun compared to earth? (earth's distance to sun is 1 AU) Express your answer in terms of astronomical units or AU (1AU = 1.496 x 108 km). Assuming that the sun is fixated at a center point, calculate the area (in of the unknown planet's orbit (assume that the orbit is circle).

6.. Determine the mass, radius, and orbital radius of this planet. help please

Earth Mars Saturn answers, include units 1 AU=1.496 x 10" m and Mun= 1.989 x 10 kg Mass of planet Radius of (kg) planet (km) 6371.0 3389.5 58,232 5.972x1024 6.417x102 5.683x102 Semimajor axis Eccentricity of Period of orbit of orbit a (AU) orbit e T (years) 1.00 0.0167 1.00 0.0934 1.88 0.0565 9.58 a) Use Kepler's 3rd Law to find the semimajor axis of Mars' orbit. AU m b) Use Kepler's 3rd Law to find the period of Saturn's orbit. c) Find the gravitational acceleration on the surface of Mars both in m/s² and as a multiple of Earth's gravitational acceleration. yrs m/s² g For (d) and (e), Earth's orbit is elliptical (ez0) but the semimajor axis is the average radius of the orbit so using the semimajor axis as the radius will let you solve for the average force and speed. d) Find the average force of gravity on the Earth from the Sun. e) Find the average speed of Earth as it moves around its orbit. N m/s