Your question does not make any sense. The Earth and the Moon stay the same size and are always in Space.
The Moon is Smaller then the Earth.
To launch a space shuttle (or anything) you have to overcome gravity. The gravitational attraction of the moon is tremendously less than that of the Earth. The moon is much smaller than the Earth.
As objects get smaller, the ratio of surface area (heat loss to space) to volume (heat retained) gets larger. It is easier for the Moon to lose heat to space. Next, the Moon has no atmosphere to act as a blanket to prevent heat loss to space. Finally, the Moon is formed of lighter materials than the Earth proper, perhaps lighter materials from Earth. This means Earth's core has more heavy elements, that appear to actually be radioactive, heating the Earth's core.
moon is smaller
The Moon is smaller than the Earth
because the moon is much smaller than earth
It isn't smaller - Earth is larger.
The gravity is less on the Moon, because the Moon is smaller than earth; it has less mass, and therefore "sucks" less than the earth. Weight is gravity times mass, you have the same mass on Earth and on the Moon (and in space), but weigh less on the moon.
Mercury is almost the same size as the Moon. The Moon is smaller than Earth. Mercury is then smaller than Earth.
because the earth is far from the moon
The moon is much smaller, about 1/4 the diameter of Earth.
Pluto is the dwarf planet that is smaller than the Earth's moon.