The sidereal period of the Moon is the time needed for it to return to the same position against the background of stars. The Moon appears to move completely around the celestial sphere once in about 27.3 days as observed from the Earth. This is called a sidereal month. It represents the orbital period of the Moon around the Earth.

5. In an eclipsing spectroscopic binary, the maximal radial velocities measured for the two components are 20 km s−1 and 5 km s−1 . The orbit is circular, and the orbital period is P = 5 yr. It takes 0.3 day from the start of the eclipse to the main minimum, which then lasts 1 day. a. Find the mass of each star.

What is its orbital period? Show your work. b) Newzon showed how to apply Kepler's third law to bodies orbiting things other than the Sun. Imagine you found a planet with an 84 AU orbit around Betelgease, the reddish star in the upper left cotncr of Orion. Betelgeuse has a mass 18 times larger than the Sun's.

Calculate the orbital period of the Hubble Space Telescope (assume a circular orbit). Give you answer in units of minutes to an accuracy of ±4 minutes. The Hubble Space Telescope orbits the Earth at an altitude of h = 569 km above the Earth (1 km = 10 3 m) .

The dwarf planet Pluto has an elliptical orbit with a semi-major axis of 5.91×1012 m and eccentricity 0.249. Calculate Pluto's orbital period. Express your answer in seconds. Calculate Pluto's orbital period. Express your answer in earth years. During Pluto's orbit around the sun, what are its closest distance from the sun?

Say an asteroid is discovered that is on average of 3 AU from the Sun. Which of the following best approximates the orbital period of this asteroid? (Kepler's 3rd law) Stars X, Y, and Z have apparent magnitudes (how bright the stars appear in the …

An asteroid is a rocky body in space which may be only a few hundred feet wide or it may be several hundred miles wide.

Question: Kepler's Third Law in the table below we have provided the orbital distances, orbital periods, and masses for the six planets closest to the Sun. Planet Orbital Period (in years) Orbital Distance (in astronomical units-AU) 0.38 0.72 Mercury Venus Earth Mars Jupiter Saturn 1.0 Planet Mass (in units of Earth's mass) 0.06 0.82 1.0 0.11 318 95.2 0.24 0.61 1.0

a) Calculate the orbital radius of Pluto in AU if its orbital period is 248 Earth years. sing kepler's thed law. As mym, so formula, we can write. nemam acbital radius (for circulac ochit] Nou T = 248 the earth years = 248 *365*24 36005 T is time period of body [here for pluto ] a3.(248.365x24x3600)*66740tk 240

Question: A planet is discovered orbiting around a star in the galaxy Andromeda at the same distance from the star as Earth is from the Sun. If that star has four times the mass of our Sun, how does the orbital period of the planet compare to Earth's orbital period?