1. a) What is the speed of light in cm/sec? b) What is the definition of the Ast

Question

1. a) What is the speed of light in cm/sec? b) What is the definition of the Astronomical Unit? How many centimeters are there in 1 AU? Calculate how long it takes light to travel from the sun to the Earth.

2. What is the ratio of the radius of the Earth to the sun? Of Jupiter to the sun? Draw three circles representing the sun, Jupiter, and the Earth side by side. Make the ratio of their radii the same as the ratio of the radii of the sun, Jupiter, and the Earth. Make the circles as accurate as you can.

3. What is the rotational period of the sun? What direction do most of the planets rotate compared to the sun? Which planets are the exceptions? Which planet rotates the fastest and what is its rotation period? The slowest? Name at least two characteristics shared by all the orbits of the planets.

Explanation / Answer

Answer for Question 1

Speed of light is 3.0x10^10 cm/sec

Astronomical Unit is defined as the mean distance between earth and sun.

Astronomical Unit equals to 149.7 million kilometers.

Light takes 8.2 minutes to travel from the sun to the Earth.

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