Kepler's Laws

Differentiate between a planet and a dwarf planet.

Which of the following is the classical planet?

Is Earth a classical planet?
 

The _____ classical planets are those easily seen with the naked eye.

The seven classical planets are those easily seen with the naked eye.

Define dwarf planet?

A _____ planet is a celestial body that -orbits the sun, has enough mass to assume a nearly round shape, has not cleared the neighbourhood around its orbit and is not a moon.

Pluto is known as dwarf planet.

How many classical planets are there?

Which planet is known as dwarf planet?

Explain Kepler's law of periods.

Kepler's second Law states that the line connecting the planet and the Sun covers unequal areas in equal intervals of time. 

A planet moving around the sun sweeps area $A_1$ in $5$ days, $A_2$ in $10$ days and $A_3$ in $12$ days, then find the relation between $A_1$, $A_2$ and $A_3$.

According to Kepler's second law of planetary motion, the areal velocity of a planet revolving around the sun

State Kepler's second law of planetary motion.

What do you understand by the areal velocity of a planet?

"Artificial Satellites provide us with many facilities of life we enjoy today." Do you agree with this statement? Discuss.

Did you utilise any service of satellites yesterday and today? Explain.

What are the uses of artificial satellites?

Kepler discovered