Although it is frequently referred to as a “planetary alignment,” astronomers note that a six-planet parade is not a flawless straight-line formation in space. Instead, it is a visual phenomenon created by the planets appearing along the same curved path in the sky, known as the ecliptic. Synopsis Although it is frequently referred to as a “planetary alignment,” astronomers note that a six-planet parade is not a flawless straight-line formation in space. Instead, it is a visual phenomenon created by the planets appearing along the sam... [6851 chars]