"volcano, seen from space" actually a digital wallpaper, perhaps created by HolyMan. The Earth does not appear this big when seen fro the moon, nor can you see giant sparks the size of asteroids shooting from most volcanoes.
Snapshots of the Heavens: Amazing Astronomy Photos
The aurora borealis traces the shifting patterns of the Earth's magnetic field, creating a spectacular midwinter show in Nordland Fylke, Norway. The green light in this image comes from oxygen atoms high in the atmosphere, which