A full moon above Earth's horizon and airglow.

The thin line of Earth's atmosphere and the setting sun.

Earth rises over the lunar horizon.

Full Earth view showing water vapor over the Americas.

January 2, 2009 - Cloud simulation of a single day centered over Canada.

View of the sun peeking over the limb of the Earth.

Full Earth showing evaporation over the Atlantic Ocean and the surrounding continents.

This image shows the limb of the Earth at the bottom transitioning into the orange-colored troposphere.

Aurora borealis and Full Moon over the Yukon River, Canada.

A moon rises over a rocky and barren alien landscape.

A young moon sets over two domed observatories, Crowell, Texas.

Aurora and a Full Moon over Tennevik River, Troms County, Norway.

Gibbous moon and crepuscular rays over Dinosaur Provincial Park, Canada.

Aurora borealis and Full Moon over the Yukon River, Canada.

Illustration of the peaks surrounding the Peary crater on Earth's moon.

UFO's from different alien races fighting each other in the Earth's atmosphere.

Belt of Venus and full moon rising over Silver City, New Mexico.

A blue moon rising over a calm alien ocean with a starry sky as a backdrop.

Earth and the moon.

Earth, moon and the sun.

Antique Astronomical Illustration (copper engraving) of a Planetarium showing the Orbits and relationships of the Sun, Moon, Planets and Earth over a period of Time (fig I)., 1757

View of sunrays over globes

Mir Russian Space Station in orbit over Earth.

A lake of liquid methane on Saturn's giant moon, Titan.

An artist's depiction of sunrise over a planet viewed from space.

Artist's depiction of a heavily cratered moon in orbit around it's home planet.

An Earth-like planet rises over a rocky and barren alien world.

Artist's concept of a view across the surface of the Moon towards Earth in the distance.

An artist's depiction of a large planet covered by oceans with a thick atmosphere.

Illustration of an astronaut in orbit over earth-like planet system with space station.

Artist's depiction of a satellite in orbit around an Earth-like world and moon.

An artist's depiction of an Earth type world with two orbiting moons.

The moon over the airglow of Earth's atmosphere.