can someone please answer these questions about the moon?

Question

when was earth's moon discovered?
distance from earth?
rotational period?
orbital period?
what is the atmosphere made up of?

if anyone can answer the same things about jupiter or mars or saturns moons you'll get 10 points!

please help me!

Answer 1

Unlike the moons of other planets, the moon of the Earth has no proper English name other than "the Moon".

The word moon is a Germanic word, related to Latin mensis; it is ultimately a derivative of the Proto-Indo-European root name-, also represented in measure (time), with reminders of its importance in measuring time in words derived from it like Monday, month and menstrual.

In English, the word moon exclusively meant "the Moon" until 1665, when it was extended to refer to the recently-discovered natural satellites of other planets.The Moon is occasionally referred to by its Latin name, Luna, in order to distinguish it from other natural satellites.

The first leap in lunar observation was prompted by the invention of the telescope. Galileo Galilei made good use of this new instrument and observed mountains and craters on the Moon's surface.

The average centre-to-centre distance from the Earth to the Moon is 384,403 km, which is about 30 times the diameter of the Earth.

The Moon has a diameter of 3,474 km [1]—slightly more than a quarter that of the Earth. This means that the volume of the Moon is close to 1/50th that of Earth.

The gravitational pull at its surface is about 1/6th of Earth's.
The Moon makes a complete orbit around the Earth every 27.3 days, and the periodic variations in the geometry of the Earth–Moon–Sun system are responsible for the lunar phases that repeat every 29.5 days.

Atmosphere:
The Moon has an atmosphere so thin as to be almost negligible, with a total atmospheric mass of less than 104 kg.
One source of its atmosphere is outgassing—the release of gases such as radon that originate by radioactive decay processes within the crust and mantle. Another important source is generated through the process of sputtering, which involves the bombardment of micrometeorites, solar wind ions, electrons, and sunlight. Gases that are released by sputtering can either reimplant into the regolith as a result of the Moon's gravity, or can be lost to space either by solar radiation pressure or by being swept away by the solar wind magnetic field if they are ionised. The elements sodium (Na) and potassium (K) have been detected using earth-based spectroscopic methods, whereas the element radon–222 and polonium–210 have been inferred from data obtained from the Lunar Prospector alpha particle spectrometer. Argon–40, He–4, O and/or CH4, N2 and/or CO, and CO2 were detected by in-situ detectors placed by the Apollo astronauts.

Answer 2

Discovered By
Known by the Ancients


Date of Discovery
Unknown



Average Distance from Earth
Metric: 384,400 km
English: 238,855 miles


Sidereal Rotation Period (Length of Day)
27.321661 Earth days
655.72 hours



Sidereal Orbit Period (Length of Year)
0.075 Earth years
27.321661 Earth days



http://solarsystem.nasa.gov/index.cfm

Answer 3

You can get all of those answers with a quick web search.
When was Earths Moon first discovered?? The first time JoJo the caveman looked at something other than the ground ☺

Doug