Why does the moon shine? It isn't a ball of hot, glowing gas, like the sun. It's a ball of cold, hard rock. How can rock give off light? The answer to that may surprise you. The moon is like a giant...
Our next-door neighbor
As earth whirls along on its endless journey through space, it has a companion that is always beside it--- the moon. The moon is a small planet. It is only about one-fourth as big as earth. The moon...
Who stole the sun?
It's the middle of the day. The sun hangs big and bright in the sky. But, what's this? The sky seems to be growing dark. Is there going to be a storm? No, there are no clouds. Why is the sky getting...
The four seasons
Summer. Trees burst with thick loads of leaves. Flowers nod in soft, warm breezes. Insects buzz. A blue sky holds a bright, hot sun. Winter. Bare trees stand like bony skeletons against a cold, gray...
Moving into daytime
Imagine that you have awakened very, very early. You look out of a window. The sky is still black, and the whole world seems dark and silent. But as you watch for a long time, the sky slowly turns...
The source of life
Without the sun, there could be no life on earth. Energy pours up out of the raging hot atomic furnace that is the center of the sun. It moves up to the sun's seething, boiling surface and rushes...
How the sun was born
Most scientists think our sun began as an immense cloud of gas and dust. Stars that are growing old often shoot out enormous clouds of gas and dust. The gas and dust are made up of all kinds of...
The bright giant
It's a Fact About 1,300,000 planets the size of earth could be packed into the sun. Millions of miles (kilometers) out in space there is a gigantic ball of hot, glowing gas we call the sun. The...
The black emptiness
Space is---emptiness. It is black because emptiness has no light of its own. It is neither cold nor hot because emptiness has no temperature. And, of course, there is no air or water in space. But...
Planets, Stars, and Galaxies
Planets, Stars, and Galaxies Planets, Stars, and Galaxies
