Impressive images of our blue Planet
from space can be seen in this site. Most images are from NASA and the U.S.
Polar Mesospheric Clouds (also known as noctilucent clouds) are transient, upper
atmospheric phenomena observed usually in the summer months at high latitudes
(greater than 50 degrees) of both the Northern and Southern Hemispheres. They
are bright and cloudlike in appearance while in deep twilight. They are
illuminated by sunlight when the lower layers of the atmosphere are in the
darkness of the Earth's shadow. This image was acquired from the International
Space Station at an altitude of just over 320 km in the pre-dawn hours. Image
courtesy of NASA.
The Earth and Moon
The Sun shines over the Planet, as see from space.