'Night sky dark' presentation slideshows

The Beginning of Time

1.18k views • 85 slides

What is the moon made of ? Lesson 22

What is the moon made of ? Lesson 22. We can see the moon at night. Sometimes we can even see the moon during the day!. A long time ago people told stories about the Moon to explain its light, movement and changes in shape.

520 views • 29 slides

Expansion of the Universe

Expansion of the Universe. Natural consequence of the basic field equations of the General Theory of Relativity (GTR) When GTR was first developed in the 1920s, everyone thought the Universe was static

294 views • 14 slides

174 views • 4 slides