The Moon is Earth's only natural satellite. Although not the largest natural satellite in the Solar System, among the satellites of major planets it is the largest relative to the size of the object it orbits.
Distance to Earth: 238,900 miles (384,400 km)
Gravity: 1.622 m/s²
Orbitalperiod: 27 daysAge: 4.527 billion years
Circumference: 6,784 miles (10,917 km)
Waxing Moon:the moon at any time after new moon and before full moon,so called because its illuminated area is increasing.
Waning Moon:the moon at any time after full moon and before new moon(so called because its illuminated area is decreasing).
Gibbous Moon:It’s when the Moon is more than half full, but not quite fully illuminated, when you look at it from the perspective of Earth.
Cresent Moon:A crescent moon is part way between a half moon and a new moon, or between a new moon and a half moon.
A waxing moon: the left side of the moon should appear round and smooth. The right side will be a crescent shape that looks a little rough as it moves into an oval shape, like the letter "C".while...
in a waning moon the right side, which will be the round and smooth side this time. The left side should appear blurred and rough, like the letter "D".
The lunar phase or phase of the moon is the shape of the illuminated (sunlit) portion of the Moon as seen by an observer on Earth. The lunar phases change cyclically as the Moon orbits the Earth, according to the changing positions of the Moon and Sun relative to the Earth. A lunar cycle is about 29 days.
The Moon (or Luna) is the Earth’s only natural satellite and was formed 4.6 billion years ago around some 30–50 million years after the formation of the solar system. The Moon is in synchronous rotation with Earth meaning the same side is always facing the Earth. The first unmanned mission to the Moon was in 1959 by the Soviet Lunar Program with the first manned landing being Apollo 11 in 1969.
The dark side of the moon is a myth:
In reality both sides of the Moon see the same amount of sunlight however only one face of the Moon is ever seen from Earth this is because the Moon rotates around on its own axis in exactly the same time it takes to orbit the Earth, meaning the same side is always facing the Earth. The side we see is lit by reflected sunlight, while the side facing away from Earth lies in darkness and has only been seen by the human eye from a spacecraft.
The rise and fall of the tides on Earth is caused by the Moon:
There are two bulges in the Earth due to the gravitational pull that the Moon exerts; one on the side facing the Moon, and the other on the opposite side that faces away from the Moon, The bulges move around the oceans as the Earth rotates, causing high and low tides around the globe.
A person would weigh much less on the Moon:
The Moon has much weaker gravity than Earth, due to its smaller mass, so you would weigh about one sixth (16.5%) of your weight on Earth. This is why the lunar astronauts could leap and bound so high in the air.
The Moon has only been walked on by 12 people; all American males:
The first man to set foot on the Moon in 1969 was Neil Armstrong on the Apollo 11 mission, while the last man to walk on the Moon in 1972 was Gene Cernan on the Apollo 17 mission. Since then the Moon has only be visited by unmanned vehicles.
The Moon has no atmosphere:
This means that the surface of the Moon is unprotected from cosmic rays, meteorites and solar winds, and has huge temperature variations. The lack of atmosphere means no sound can be heard on the Moon, and the sky always appears black.
The Moon has quakes:
These are caused by the gravitational pull of the Earth. Lunar astronauts used seismographs on their visits to the Moon, and found that small moonquakes occurred several kilometres beneath the surface, causing ruptures and cracks. Scientists think the Moon has a molten core, just like Earth.
The first spacecraft to reach the Moon was Luna 1 in 1959:
This was a Soviet craft, which was launched from the USSR. It passed within 5995 km of the surface of the Moon before going into orbit around the Sun.
The Moon is the fifth largest natural satellite in the Solar System:
At 3,475 km in diameter, the Moon is much smaller than the major moons of Jupiter and Saturn. Earth is about 80 times the volume than the Moon, but both are about the same age. A prevailing theory is that the Moon was once part of the Earth, and was formed from a chunk that broke away due to a huge object colliding with Earth when it was relatively young.
The Moon will be visited by man in the near future:
NASA plans to return astronauts to the moon to set up a permanent space station. Mankind may once again walk on the moon in 2019, if all goes according to plan.
During the 1950’s the USA considered detonating a nuclear bomb on the Moon:
The secret project was during the height cold war was known as “A Study of Lunar Research Flights” or “Project A119″ and meant as a show of strength at a time they were lagging behind in the space race.
The Moon is drifting away from the Earth:
The Moon is moving approximately 3.8 cm away from our planet every year. It is estimated that it will continue to do so for around 50 billion years. By the time that happens, the Moon will be taking around 47 days to orbit the Earth instead of the current 27.3 days.
Copernicus was born in 1473. He explained to the world how the sun was the center of the solar system, not the Earth. This led to today's understanding about the sun and Earth.We have seasons because of the way the Earth tilts towards the sun. The solstices is what makes the night time and day light hours. They usually occur each year on June 20 or 21 and December 20 or 21. The vernal equinox and autumnal equinox are the beginning of Spring and Fall. At these times of the year the sun is usually over the Earth's equator.Winter isn't warmer because in other places it is summer during that time.There isn't a lunar eclipse every month because the orbit of the moon and the Earth is always tilted 5 degrees in some direction.Equinox means equal night which is when day and night are both 12 hours.Solstice is the changes of the seasons on Summer and Winter
Alfred Wegener was a German meteorologist and geophysicist who developed the first theory of continental drift and formulated the idea that a supercontinent known as Pangaea existed on the Earth millions of years ago.
coming closer together, especially in characteristics or ideas.
tending to be different or develop in different directions.
Places where plates slide past each other are called transform boundaries. Since the plates on either side of a transform boundary are merely sliding past each other and not tearing or crunching each other, transform boundaries lack the spectacular features found at convergent and divergent boundaries. Instead, transform boundaries are marked in some places by linear valleys along the boundary where rock has been ground up by the sliding. In other places, transform boundaries are marked by features like stream beds that have been split in half and the two halves have moved in opposite directions.
What tectonic plate is just off the coast of Washington?