Moon rocks contain few volatile substances (e.g. water), which implies extra baking of the lunar surface relative to that of Earth. The relative abundance of oxygen isotopes on Earth and on …

One theory states that the debris from the impact was hurtled into space where, due to gravity, it combined. This resulted in the formation of the Moon. The gravitational pull of the Moon on the …

An asteroid is a rocky body in space which may be only a few hundred feet wide or it may be several hundred miles wide. They are considered to be debris left over from the formation of …

The Moon: Earth's Satellite The Moon is the only place in our solar system, other than Earth, where humans have visited. On July 20, 1969, astronauts Neil Armstrong and Edwin Aldrin …

Jupiter's Moon, Io Jupiter's moon Io is 778 million kilometers from the Sun. Except at its volcanic hot spots, Io's surface temperature is well below freezing. Instruments aboard the space probe …

The StarChild site is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), within the Astrophysics Science Division (ASD) at NASA/ GSFC. StarChild …

A careful observer will certainly notice that over the period of months, the crescent of the Moon does indeed seem to go from being lit on the "bottom" of the Moon to being lit on the side of …

Hi'iaka is the larger moon, while the smaller moon was named Namaka. It is believed that these moons formed as a result of a collision between Haumea and some other body. Haumea is …

Neither are we aware of the pull of lunar gravity on our bodies, but the Moon's gravity is responsible for the ocean tides on Earth. The story of Isaac Newton discovering the laws of …

The Moon orbits Earth at an average distance of 382,400 kilometers. The lunar month is the 29.53 days it takes to go from one new moon to the next. During the lunar month, the Moon goes …