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A planet moves slowest at its closest point (perihelion) and fastest at its most distant point (aphelion).
The sum of the kinetic and potential energies of a planet remains constant in its orbit.
The distance travelled by light in one second is 300,000 km.
The time taken for light to travel from the Sun to the Earth is about 8.3 minutes.
Uranus has a mean orbital speed of 6.8 km/s.
Neptune has a greater mean orbital speed than Jupiter.
The orbital period of the Moon around the Earth is about 30 days.
The speed of light is used to calculate the time taken for light to travel across the Solar System.
The field strength on the Earth\’s surface is about 10 N/kg.
All objects travel in circular orbits around the Sun.