In Norway the sun is continuously visible between May and July. In the southern hemisphere the same phenomenon is seen in the Antarctica Continent.

There are two types of eclipse: Solar eclipse and Lunar eclipse. Solar eclipse occurs when moon lies between the sun and the earth while Lunar eclipse occurs when earth comes in between the sun and the mmon. A lunar eclipse takes place on a full moon.

The First layer of the atmosphere is Troposphere. The second layer is Stratosphere. The third layer is Mesosphere. The fourth layer is Thermosphere and the fifth layer is Exosphere.

Stratosphere is second layer of the atmosphere and it extends from the tropopause(end of Troposphere) to about 50 km.

Thermosphere lies above Mesosphere. It extends to a height of about 500 KM. The gas molecules in this layer abosrb X-rays and UV rays of the Sun and gets split into positively and negatively charged ions. Hence, it is also called ionosphere. These electrically charged gas molecules reflect radio waves from the Earth back into space. Thus, this layer helps in long distance communications.

Thermosphere and Exosphere are the outermost layers of atmosphere. These layers are ideal for artificial satellites to do work efficiently. Thermosphere is ideal for Communication satellites. Exosphere extends beyond thermosphere upto 960 KM.

The sun releases tremendous amount of energy (heat & light both) by nuclear fusion in all directions.