Explain the importance of satellites in details?

What is the name of $400 \mathrm{km}$ thick bright layer around the sun?

Why do tail of comets formed, when it comes closer to sun?

The earth takes $1$ year to make a complete revolution around the sun whereas Pluto takes nearly $248$ of our earth years to orbit the sun. What is the main reason for this?

Which satellite is used for geographical survey?

Mention any two achievements of Hubble Telescope.

Which of the following is not a natural satellite?

What is an artificial satellite? Name any two types of artificial satellite and state their functions.

The below-given image shows that _____.