পাতা:পদার্থবিদ্যাসার.djvu/৩৫

$24 Pup. ... When do eclipses of the moon happen? Tut. Only when the moon is at its full. Pup. As the moon is a dark body of itself, do we receive any benefit from it 2 Tut. Yes, from its reflecting to us the sun’s light; which is so pleasing and useful during the long and dark nights. What a unark of the divine goodness, thus to provide a light for us in the absence of the sum ! Pup. Do we terive auy othor ad vantages from the moou ! Tut. Yos; it is, together with the sun, the cause of the “bling and flowing of the sea, which tends to purify it; and the tides are useful for uavigation. Pup. Is the moon inhabited? Tut. Philosophers suppose it is ; and that our earth serves as a moon to its inhabitants. For you may see plainly, that our earth reflects the sun’s light on that side which is not illuminated : this may be perceived at every new moon : but more in the winter than the summer months. Pup. Wilt the earth appear to the inhabitants of the noon, as the moon does to us? \it. It will : only about thirteen times larger, What a brilliant sight must a heavenly body be so much larger than our full moon When the In೦೦॥ is full to us, our earth will not be visible to the lunar inhabitants; and when the earth is full to them, wederive no advantage from the uloon.