A full moon is visible in this view above Earth's horizon and airglow

The moon and Earth's atmosphere.

The moon and Earth's atmosphere.

Color mosaic of the Earth's moon.

Earth rising above the Moon's horizon.

A gibbous moon visible above Earth's atmosphere.

The Lunar CRater Observation and Sensing Satellite (LCROSS).

Earth's thin line of atmosphere and a gibbous moon.

Artist rendition of a new spaceship to the moon.

The Apollo 10 Command and Service Modules in lunar orbit.

Artist's concept showing showing a possible inner core of the Earth's moon.

Progress of the International Space Station as it crosses the face of the moon.

An astronaut takes a last look at Earth before entering orbit around the moon.

Illustration of Enceladus in front of the Earth and next to Earth's moon.

Artist's concept of a lunar cycler.

A starship from Earth travels to a red planet.

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

A starship from Earth with ion drive propulsion explores the cosmos.

A reusable lunar shuttle prepares to dock with a lunar cycler.

Artist's concept of a view across the surface of Themisto towards Jupiter and its moons.

A Phobos mission rocket ignites its chemical thrusters.

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

An astronaut floating in front of a water covered world with two moons.

Antique Celestial Illustration (aquatint) showing the relationship the Earth's Orbit around the Sun and the Moon's Orbit around the Earth., 1842

Antique Celestial Illustration (copper engraving) of the Geometrical Constructions of Solar and Lunar eclipses., 1757

Antique Astronomical Illustration (copper engraving) of Venus as lighted by the Sun, the lighting of the Earth and Moon in their orbits relative to the Sun etc., 1794

View of the Moon and Earth taken by Lunar Orbiter 1.