150 million km from the Sun (one astronomical unit, 1 AU)
23 hours 56 minutes (one sidereal day)
1g (by definition)
Earth has one moon, the Moon.
The Moon is tidally locked to the Earth, meaning that we only ever see one side of it (left-hand picture). The opposite side is called the far side (right-hand picture). (The ‘dark side’ of the Moon is the side that is not currently being illuminated by the Sun. This varies constantly as the Moon rotates on its own axis.)