Kearney's Comet has a radius of 403. km and orbits the solar system (goes around the Sun) in a circular path. The mass of Kearney's Comet is 8.45 × 1015 kg, and it is a distance of 9.72 × 1012 m from the Sun. How long does it take Kearney's comet to orbit the Sun once? Answer in units of years.

A satellite, with a mass of M=7.30x10^22 kg, moves in a circular orbit of radius R=3.80x10^09 meters. The satellite makes an entire rotation about the planet in 26.4 days. The planet attracts the satellite with a force of how many newtons?

An undiscovered planet, many light-years from Earth, has one moon, which has a nearly circular periodic orbit. If the distance from the center of the moon to the surface of the planet is 2.270 × 105 km and the planet has a radius of 4.200 × 103 km and a mass of 7.75 × 1022 kg, how long (in days) does it take the moon to make one revolution around the planet? The gravitational constant is 6.67 × 10-11(Nm2)/(kg2).

A satellite of Mars, called Phobos, has an orbital radius of 9.4 ✕ 106 m and a period of 2.8 ✕ 104 s. Assuming the orbit is circular, determine the mass of Mars. (ans kg)

You are the science officer on a visit to a distant solar system. Prior to landing on a planet you measure its diameter to be 1.50×107 m and its rotation period to be 22.3 hours. You have previously determined that the planet orbits 2.50×1011 m from its star with a period of 402 earth days. Once on the surface you find that the free-fall acceleration is 13.1m/s2. What is the mass of the planet? Express your answer with the appropriate units.   What is the mass of the star? Express your answer with the appropriate units.

Why does a satellite in a circular orbit travel at a constant speed? There is no component of force acting along the direction of motion of the satellite. The net force acting on the satellite is zero. The gravitational force acting on the satellite is balanced by the centrifugal force acting on the satellite. There is a force acting opposite to the direction of the motion of the satellite.

Astronomers discover an exoplanet, a planet orbiting a star other than the Sun, that has an orbital period of 1.50 Earth years in a circular orbit around its star, which has a measured mass of 3.80×10^30 kg.Determine the radius ? of the exoplanet's orbit.

A satellite is in a circular orbit about the earth (ME = 5.98 x 1024 kg). The period of the satellite is 1.03 x 104 s. What is the speed at which the satellite travels?

Astronomers discover an exoplanet, a planet orbiting a star other than the Sun, that has an orbital period of 3.87 Earth years in a circular orbit around its star, which has a measured mass of 3.77×10^30 kg. Find the radius r of the exoplanet's orbit.

A satellite is launched to orbit the Earth at an altitude of 1.80 x 107 m for use in the Global Positioning System (GPS). Take the mass of the Earth to be 5.97 x 1024 kg and its radius 6.38 x 106 m. (a) What is the orbital period of this GPS satellite? h (b) With what speed does it orbit the Earth? m/s