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The orbital period of Planet A is 16 years and its average distance to Star B is

5.25 a.u. Another planet called Planet C has an average distance of 10.3 a.u.

from Star B, using Kepler’s Third Law of Planetary Motion, compute the orbital

period of Planet C to Star B in days.

The orbital time of Neptune around the Sun is 165 Earth years and its orbital path is 30 times longer than that of the Earth.

a) Calculate the orbital speed of Neptune relative to the Earth. orbital speed

b) State how the speed of travel of Neptune compares with that of the Earth.

The orbital time of Neptune around the Sun is 165 Earth years and its orbital path is 30 times longer than that of the Earth.

Calculate the orbital speed of Neptune relative to the Earth. orbital speed

State how the speed of travel of Neptune compares with that of the Earth.

Redshift measurements show that a galaxy is moving away from the Earth at the speed of 60000 km/s. Taking the Hubble constant H, as 2.2 x 10-18s¹ and 1 light-year as 10¹3 km, calculate and show your working for:

a)how far the galaxy is from the Earth distance

b)how long it has taken light from the galaxy to reach the Earth

c) the time the galaxy and the Milky Way have been travelling apart

d) Explain the significance of the time you calculated in c part of the question

Redshift measurements show that a galaxy is moving away from the Earth at the speed of 60000 km/s. Taking the Hubble constant H, as 2.2 x 10-18s¹ and 1 light-year as 10¹3 km, calculate and show your working for:

a) a how far the galaxy is from the Earth distance

b) how long it has taken light from the galaxy to reach the Earth

c) the time the galaxy and the Milky Way have been travelling apart

D) Explain the significance of the time you calculated in c part of the question

The orbital time of Neptune around the Sun is 165 Earth years and its orbital path is 30 times longer than that of the Earth.

a Calculate the orbital speed of Neptune relative to the Earth. orbital speed b

State how the speed of travel of Neptune compares with that of the Earth.

Redshift measurements show that a galaxy is moving away from the Earth at the speed of 60000 km/s. Taking the Hubble constant H, as 2.2 x 10-18 s-1 and 1 light-year as 1013 km, calculate and show your working for: a how far the galaxy is from the Earth

If you use volleyball as a model of earth, how big would be 1kilometer? The volleyball has a conference of 68 cm.

angular velocity of the telescope as it orbits round the sun

A "light-year" is the distance light (speed = 2.998 108 m/s)travels in one year.

(a) How many meters are there in 4.00 light-years? m

(b) An astronomical unit (AU) is the average distance from the Sun to Earth, 1.50 108 km. How many AU are there in 4.00light-year? AU

(c) What is the speed of light in AU/h? AU/h

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