Page:The Music of the Spheres.djvu/298

 It has been estimated that as Neptune is so far away from the sun, it receives only th as much light and heat as our earth.

The sun, as viewed from Neptune, would look very small, not much larger than Venus does to us when she is nearest the earth, although he gives to Neptune 250,000 times more light than Venus gives to us at her best.

Neptune possesses only one known satellite. This satellite has the peculiarity of whirling much as if it had been tipped over through an angle of 150 degrees, which causes it to move in a direction opposite to that in which the planets travel around the sun.