In a galaxy far far away there is the planet Dagobah that is located 6.00 x 10 14 km from its star. It takes 2.31 Earth years for Dagobah to complete one orbit. What is the instantaneous linear velocity of Dagobah?

A planet with mass 4.83x1023 kg orbits a star with mass 6.95x1030 kg. The orbit is circular, and the distance from the planet to the sun is 244x106 km. What is the length of a year on this planet? Give your answer in earth years (1 earth year = 31,557,600 seconds).

The Sun orbits the center of the Milky Way galaxy once each 2.60 × 108 years, with a roughly circular orbit averaging 3.00 × 104 light years in radius. (A light year is the distance traveled by light in 1 y.) What is the centripetal acceleration of the sun in m/s2? What is the average speed of the sun in its galactic orbit in m/s?

Astronomical observations of our Milky Way galaxy indicate that it has a mass of about 8 ✕ 1011 solar masses. A star orbiting near the galaxy's periphery is 6.0 ✕ 104 light years from its center. What should the orbital period (in y) of that star be?

Astronomical observations of our milky way galaxy indicate that it has a mass of about 8x1011 solar masses. A star orbiting near the galaxy's periphery is 5.6x104 light years from its center. a.) What should be the orbital period (in years) of that star be? b.) If its period is 6.4x107 years instead, what is the mass (in solar masses) of the galaxy? Such calculations are used to imply the existence of "dark matter" in the universe and have indicated, for example, the existence of very massive black holes at the center of  some galaxies.

When a falling meteoroid is at a distance above the Earth's surface of 2.60 times the Earth's radius, what is its acceleration due to the Earth's gravitation?(Note that 2.60 * RE is the distance above the Earth surface. What is the distance from the center of the Earth? m/s2 towards earth)

According to Lunar Laser Ranging experiment the average distance Lm from the Earth to the Moon is approximately 3.97 x 105 km. The Moon orbits the Earth and completes one revolution relative to the stars in approximately 27.5 days (a sidereal month). Calculate the orbital velocity of the Moon in m/s.

Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 35.1km/s and 53.1km/s. The slower planet's orbital speed is 7.53years. What is the mass of the star, and what is the orbital period of the faster planet, in years?

Consider the Earth's orbit around the Sun to be circular with radius R = 9.30 x 107 mi and it takes 365 days to complete one revolution. What is the distance Earth traveled for one revolution (circumference of a circle is 2??2πR )?

The International Space Station is in a 270-mile-high orbit. What is the station's orbital speed? The radius of Earth is 6.37×106m6.37×106m, its mass is 5.98×1024kg5.98×1024kg. What is the station's orbital period?