The term syzygy is referred to which of the following?

The Earth is at perihelion and the Moon at perigee. The Earth is at aphelion and the Moon at apogee. The Moon and the Sun are at right angles with reference to the Earth. The Moon, Sun and Earth lie along a straight line

The Moon, Sun and Earth lie along a straight line

The correct answer is Option (4) - The Moon, Sun and Earth lie along a straight line When two or more celestial bodies arrange themselves in a straight line due to their own revolution it is known as a syzygy. All eclipses are syzygy but, not all syzygy are nor eclipses.