He was reading a book about the ancient Egyptian sun god.

A solar day is the time it takes for the Earth to orbit around the Sun.

The ocean currents can change due to the effect of the solar tide.

The underground water in this area is very clean and is used as drinking water.

He is studying thermodynamics in depth.

Lassa fever is a serious infectious disease that is particularly prevalent in West Africa.

His enthusiastic cry livened up the entire venue.

His dream is to fly in the sky in a hot-air balloon.

My friend contracted Q fever.

The thermosphere is a part of the Earth's atmosphere, located above the stratosphere and the mesosphere.