In order for an object to be considered a NEO , it must be within 1 .3 AU ‘s (or astronomical units )from the Sun . 1 .3 AU is the same as about 93 million miles . The NEO ‘s are objects that have been bumped by the gravity of other planets which let them get close to the Earth ‘s orbit . One of the major groups of NEO ‘s are meteoroids . The term meteor is actually used to describe the streak of visible light after it ‘s trip through the Earth ‘s orbit .
The geology of Mars is so immense and intricate. It would take an abundance of time to even come close to describing Mars precisely. It seems odd to me that Mars is so similar to Earth and yet we know so little about it. The only information available to us is due to visits to the planet via space ship and satellites. Also images that we are able to see from the Earth.
The first person to walk on the Moon was the American astronaut, Neil Armstrong, who stepped out of his space landing craft, the Eagle, on 21 July 1969 with these famous words, “That’s one small step for man, one giant leap for mankind”. The Moon is much smaller than the Earth, with a diameter of 3,476 kilometers. It is airless, waterless and lifeless. The moon’s surface is covered in craters, pits and scars. It shows the damage caused by large pieces of rock hitting it billions of years ago.
It is the second largest moon in the Solar System, the largest is Jupiter’s moon Ganymede, and it is larger by volume than Mercury. Titan was the first known moon of Saturn. It was discovered in 1655 by the Dutch astronomer Christiaan Huygens. Titan is mostly composed of ice and rocky material. Because Titan has such a dense atmosphere scientists had a lot of trouble studying the surface of the large moon.
Vincent P. Salarda BSBA-1B Earth Science TTH: 2:30pm-4pm 07/21/15 07/23/15 Prof. Pinky de Garcia “ Intoduction to Earth Science “ Earth is the densest planet in our Solar System. It has a density of 5.51 grams per cubic centimeter. This is only the average density of the planet. The core is much denser than the oceans for example. Actually, scientists believe that the massive amounts of iron in our planet’s core is what makes it so dense.
No longer are they looked upon as the gods or answers, but they still carry much intrigue for people. The nine planets in our solar system have very unique characteristics, and help us understand many things about the universe. The Solar System contains the Sun, eight planets, at least three dwarf planets, more than 130 satellites, and a large number of small bodies such as comets and asteroids. The Solar System is located in the Milky Way galaxy, which contains about 200 billion stars and multiple other solar systems such as ours. The inner Solar System contains four of the eight planets in our solar system.
One example of history that is retained on the surface of the Moon but has been lost from the surfaces of the terrestrial planets is the simple impact craters. They are very common and very easily spotted on the moon. The simple impact is created from meteorite or comet crashing into the surface of the moon. At the moment of collision, the surface of the moon ejects debris out into space and leave a crater behind. A simple impact crater has a circular shape surrounded by a rim that is elevated from the center of the crater.
The outermost planets are; Jupiter, Saturn, Uranus, and Neptune, and are known as the Jovian Planets. These Jovian planets are known as the gas giants because they are all gigantic compared with Earth, and they have a gaseous nature. They are made up of helium and hydrogen and are much larger than the first four. Even though each individual planet of our solar system is important in its own way, they are all held together by the gravitational pull of the Sun. The huge mass of the Sun makes it unequivocally the largest object in our solar system.
Life has altered the atmosphere by releasing high levels of carbon dioxide along with other chemicals which has been slowly thinning the atmosphere over the years, 3. Why is the rotation of Venus different from that of Earth? All the planets in the solar systems rotate counter clockwise around the sun except Venus. Venus rotates clockwise or retrograde around the sun. Venus also has the slowest rotation out of all the planets rotating around the sun every 243 Earth days.
Gravitational forces from both the sun and moon continuously pull on the Earth. It is the moon's gravity that is the force behind the Earth's tides. Every particle on Earth is pulled on by the gravity of the moon. Because liquids move more easily, the pull of gravity is much more noticeable in liquids than in solids. The moon's pull is strongest on the part of the Earth directly facing the moon.