Why eclipse does not occur on every New moon or Full moon?

Instruction

• Describe what an eclipse is
• Give reasons for the non-occurrence of an eclipse on every new moon or full moon

Answer:
An eclipse is an astronomical event when one celestial body is blocked partly or fully by another celestial body or when one celestial body casts a shadow on the other object. It happens either on the new moon or full moon, but not every new moon or full moon.

• Reasons for the non-occurrence of the eclipse on every new moon or full moon:
• Moon orbits the earth in an elliptical orbit tilted at 5 degrees with respect to Earth’s orbital plane.
• For solar and Lunar eclipse to occur, Earth, Moon and the sun should be in the same plane and in the same line.
• Had the orbit of the moon not been tilted, then the eclipse would have occurred on every full moon and new moon