Based on the orbital properties of Uranus, how far across the sky in arc seconds does it travel in one Earth day? The average orbital radius is 2.88 x 10° km and the period is 84.0 years. (Assume Uranus and the Earth are at the closest point to one another in their orbits.) How many full Moons does this distance cover if the Moon has an angular diameter of 0.5 degrees? Part 1 of 4 We first need to determine how fast the planet is moving across the sky. If we know the period and the distance between the Sun and the planet we can calculate the velocity using: 2ar which will tell us how many kilometers the planet travels in a day if we convert the period into days. Pdays = (P years ] days/year) Pays days %3D

If we treat the mass of Earth as 1, and the radius of Earth as 1, the escape velocity of a planet with 4 times the mass of Earth and the same radius will be:   1) 1. 4 times greater 2) 2 times greater 3) 4 times greater 4) 0.5 times greater

A synchronous satellite, which always remains above the same point on a planet's equator, is put in circular orbit around Uranus so that scientists can study a surface feature. Uranus rotates once every 17.2 h. Use the data of this table to find the altitude of the satellite. (in km)

Calculate the weight of a 75.6 kg astronaut on the surface of Mars at the equator. See p. 273 of your textbook for Mars' mass and equatorial radius. 75 Clu m U

An asteroid orbits the Sun with semi- major axis = 10 AU and eccentricity e = %3D %3D 0.6. Calculate the ratio of the maximum to the minimum amount of energy it receives from the Sun per second during its orbit. Select one: а. 8 O b. 64 О с. 2 O d. 16 е. 4

What is the surface gravity (local acceleration) of a planet with a mass of (3.5×1024kg) that has a radius of (2.2×106m)?

Imagine you grew up on Mars, whose semi-major axis is 1.5 AU.  In observing the planets over your lifetime from the Martian surface, what is the largest angular separation you would see between the Earth and the Sun?  Take the orbits of the Earth and Mars to be circular.

Calculate the escape velocity to an orbit of 457 km height from a planet with the radius of 2000 km and the density of 3400 kg⋅m-³. Give your answer in Sl units.

Two meteoroids are heading for earth. Their speeds as they cross the moon's orbit are 1.0 km/s. Part A The first meteoroid is heading straight for earth. What is its speed of impact? Express your answer with the appropriate units. ► View Available Hint(s) V1 = Submit Part B ¹ μA v2 = Value The second misses the earth by 5500 km. What is its speed at its closest point? Express your answer with the appropriate units. ► View Available Hint(s) CHμA Units Value (2 ? Units ?

Calculate the length of R of the semimajor axis of a planet whose period is 118 years.