A solar eclipse is when the moon blocks the sun from part of the earth.

true or false?

This is true

Solar eclipse happen once every 18 months a total solar eclipse is visible from some place on the Earth's surface.

That's two in total for every three years.

Answer: True.

Explanation:

Solar eclipse occurs the moon block the sun from the earth. The moon comes between the sun and the earth, the moon now cast a shadow on the earth. A solar eclipse can only take place in a new moon when the moon cast a shadow on the earth. Solar eclipse normally occur between 2 to 5 times in a year. We have three types of solar eclipse and they are: total solar eclipse, annular solar eclipse and partial solar eclipse.