EARTH’S MOON
By: Brenda Bimantoro
What is Earth Moon?? ..
• The celestial object which revolves round
the earth; the satellite of the earth; a
secondary planet, whose light, borrowed
from the sun, is reflected to the earth, and
serves to dispel the darkness of night. The
diameter of the moon is 2,160 miles, its
mean distance from the earth is 240,000
miles, and its mass is one eightieth that of
the earth. See Lunar month, under Month.
Properties
Earth Moon
Diameter: 3,476 km
Size: (the picture)
Mass: 7.349 x 1022 kg
Color:
The color of the Earth Moons is grey to white
Moon are made from many rocks and it was
combine into one so they have an magnet to get
the rock .
Distance …
Earth:
The Moon takes about 27 days (27 days, 7 hours, 43 minutes, 11.6 seconds) to go all the
way around the Earth and return to its starting position.
The Moon is about 250,000 miles (384,400 kilometers) from Earth.
The moon orbits Earth at an average speed of 2,288 miles per hour (3,683 kilometers per
hour).
The Moon travels at different speeds during different parts of its orbit. It moves slowest
when it is at furthest distance from Earth. The Moon moves fastest in its orbit when it is
closest to Earth.
Sun:
The Moon, on average, is about 150 million kilometers away from the Sun. That's actually
an interesting coincidence, since the Earth orbits about 150 million kilometers away from
the Sun. What? Well, the Moon orbits the Earth, so it's following the Earth around in its
orbit around the Sun.
Now, we can actually get a little more precise here. The Earth actually takes an elliptical
path around the Sun. It ranges in distance from 147 million km to 152 million km. So the
Moon can actually range in this distance as well.
But wait, we can get even more precise. The Moon takes an elliptical orbit around the
Earth. Sometimes it gets as close as 363,000 km, and other times it gets as far as 406,000
km.
So the closest point that the Moon can get to the Sun is when the Earth is at its closest
point in orbit, and the Moon is most distant from the Earth. The closest point that the Moon
can actually get to the Sun is 146,692,378 km
Life cycle of the Earth Moon
Lunar month
• A lunar month is the time the moon takes to pass
through a complete cycle of its phases and is
measured from New Moon to New Moon. A lunar
month is about 29.5 days (29 days, 12 hours, 43
minutes, 11.6 seconds)
• Whilst the Moon is orbiting the Earth, the Earth
is constantly moving because it is orbiting the
sun. The Moon therefore travels slightly more
than 360° to get from one new moon to the next.
Thus the lunar month is longer.
How old is
the Moon ..??
• The Moon is 4.5
billion years old
History of Moon
• Nobody knows exactly how the moon
formed, but this is one possibility: after the
planet Earth formed (along with the other
planets), about four and a billion years
ago, during the Hadean Eon, there were
still a lot of leftover bits of rock going
around the Sun that were not part of any
plane. One especially big chunk of rock
smashed into the Earth
Temperature
• The temperature on the moon varies
from -387 Fahrenheit (-233 Celsius), at
night, to 253 Fahrenheit (123 Celsius)
during the day.
• Because the moon has no atmosphere
to block some of the sun's rays or to
help trap heat at night, its temperature
varies greatly between day and night.
Motion
• The Moon moves in a counterclockwise
direction with an average orbital speed of
about 0.6 miles/sec or 2,160 m.p.h.
• Because the lunar orbit is elliptical, the
distance between the Earth and the Moon
varies between about 227,000 miles (365,000
km) at perigee, and about 254,000 miles
(409,000 km) at apogee, when the Moon is
farthest from the Earth. The average distance
is about 240,000 miles (385,000 km), or about
60 times the radius of the Earth itself.
Mass / Weight
• The mass of the Moon is
about 7.35 x 1022 kg, or
about 1/81 of the Earth's
mass.
• The weight of the moon
varies in different
situations.
Connection to the Earth
• There was no consensus about the origin of the Moon.
• There were three principal theories: co-accretion which
asserted that the Moon and the Earth formed at the
same time from the Solar Nebula; fission which
asserted that the Moon split off of the Earth; and
capture which held that the Moon formed elsewhere
and was subsequently captured by the Earth.
• None of these work very well. But the new and
detailed information from the Moon rocks led to the
impact theory: that the Earth collided with a very large
object (as big as Mars or more) and that the Moon
formed from the ejected material.
• There are still details to be worked out, but the impact
theory is now widely accepted.
Conditions
• The moon's diameter is about 2,160 mi (3,476
km), somewhat more than 1/4 the earth's
diameter. The moon has about 1/81 the mass of
the earth and is 3/5 as dense.
• The surface of the Moon is rocky and covered
with craters. Mountains and hills surround the
edges of large, flat plains. The lunar mountain
ranges, with heights up to 25,000 ft (7,800 m),
are comparable to the highest mountains on
earth but in general are not very steep.
Conditions
• There is no air on the Moon, but it has recently
been announced that water is definitely present according to NASA between 10 and 300 million
tons of water-ice is scattered inside the craters of
the lunar poles.
• There are dark areas on the Moon. These are
really dry land but long ago astronomers thought
they were filled with water, so they called them
seas.
Time Length
• The Moon is a 4.6 billion year old ball of rock
that circles around Earth once every 27 days, 7
hours and 43 minutes.
Bibliography
• http://wiki.answers.com/Q/What_is_the_distance_from_t
he_moon_to_the_sun
• http://www.lunarlandowner.com/moon_data.htm
• http://www.universetoday.com/20050/10-interesting-factsabout-the-moon/
• http://answers.yahoo.com/question/index?qid=201009140
35436AAKhhrE
• http://nineplanets.org/luna.html
• http://solarsystem.nasa.gov/planets/profile.cfm?Display=F
acts&Object=Moon
• http://www.woodlandsjunior.kent.sch.uk/time/moon/facts.htm
• http://coolcosmos.ipac.caltech.edu/cosmic_kids/AskKids/m
oontemp.shtml