Until around 4.5 million years ago, the Kashmir Valley was a massive freshwater lake, according to NASA's Earth Observatory.

Sobering satellite photos show the true extent of the unprecedented volume ... He covers a wide range of topics including space exploration, planetary science, space weather, climate change ...

As the moon moves around the earth different parts of it are lit, which is why it appears to change shape. Space contains so many stars; we see those too at night when we look into the sky.