A leap year has ___________ days in February.

Part that surrounds umbra is known as

Seasons are caused because of

Solar eclipse can observe through

The motion of the earth round the sun is

After _______ years and _______ days only solar and lunar eclipses recur in the same sequence and in the same manner.

What occur when earth comes between the sun and the moon?

Orbit is the

Earth rotates round itself. It is called

Imaginary line drawn through the center of the earth