It takes nearly 16 days for Titan to orbit all the way around Saturn. Titan is the only known moon in our solar system to have a dense atmosphere, and the only object other than Earth that has evidence of bodies of water. Titan is the sixth moon from Saturn. Titan is a very planet like moon; its diameter is about 50% larger than Earth's moon and is nearly 80% more massive. 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.
Collision Course – NEO ‘s When looking at the Earth in the Solar System , there are many fascinating objects , and also many dangerous ones . NEO ‘s , or Near Earth Objects are constantly being studied to determine the actual possibility of collision with the Earth . Most NEO ‘s consist of meteors , meteorites ,comets and asteroids . Though most of the objects are too small to cause any sort of substantial damage , there are a few that are capable of causing the next major extinction . In order for an object to be considered a NEO , it must be within 1 .3 AU ‘s (or astronomical units )from the Sun .
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.
It is the second brightest object in the sky after the sun. The gravitational forces between the Earth and the moon cause some interesting effects; tides are the most obvious. It is the only celestial body other than Earth on which humans have set foot. The first man to make proper maps of the moon was Galileo. 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”.
We learned a lot about the origin of the moon and also about the early history of the earth. Not to mention all the technological advances that were made such as the advancements in computers which were used to guide the Saturn V rocket into the earth's orbit (Howell). After all the benefits that we have reaped from going to the moon why would we stop. The problem is that with the advancement of technology a lot of space missions that used to require humans no longer do. That is why after George W. Bush announced the launch of a program designed to put men back on the moon many people, including astronomers came out against the idea (David).
His name is one of only 72 names inscribed on the Eiffel Tower. Shortly after the discovery of Neptune, Le Verrier was convinced that there still might be another planet further out in our Solar System. It turned out to be a large moon of Neptune, named Triton. With this discovery, more accurate and detailed data could be obtained about Neptune, such as Neptune’s mass and orbital path. A British astronomer, William Lassell, is actually credited with the discovery of Triton.
Tides are daily movements of ocean water that change the level of the ocean's surface.The tides are caused by the exertion of gravitational forces by the moon and sun, and the rotation of the Earth. The relationship between the phases of the moon and the tides was first discovered more than 2,000 years ago by Pytheas, a Greek explorer. However, Pytheas could not explain the reasons behind the relationship. It was not until Sir Isaac Newton published his theories on gravitational pull in 1687 that the relationship between the moon and tides were fully understood. Gravitational forces from both the sun and moon continuously pull on the Earth.
This finding of the impact crater is very important because that implies the rocks at the rim of crater provide give scientists more information about the origin of the moon, the moon in the ancient time. Comparing the number of impact craters on the Earth to the Moon and other terrestrial worlds, we could say that it is very rare. There are many reasons that could explain why other planets will be more impact craters than the Earth, for example, Earth’s atmosphere, geological activity, and human activities could be responsible to the phenomenon of lost impact craters on the Earth. First, the Earth’s atmosphere, a lot of smaller meteorite or comet cannot get through Earth’s atmosphere. They burn up after entering the Earth’s atmosphere, thus a lot of them did not make
Earth and Mars also both have a lithosphere, hydrosphere and atmosphere. This means that the environment on Mars has air, water and ice systems which affect the geology of Mars just like they affect the geology on Earth. There has always been a debate as to whether or not there could be life on Mars. This may be one reason as to why Mars and its geology has been a target of scientific exploration and research for hundreds of years. Mars is the fourth planet from the sun formed approximately 4.5 billion years ago.
Three of the four inner planets (Venus, Earth, and Mars) have atmospheres substantial enough to generate weather. All of the inner planets have impact craters and tectonic surface features such as rift valleys and volcanoes. The first of the inner planets, and closest planet to the Sun, is Mercury. It is the smallest planet in the Solar System and has no natural satellites. Its only known geological features are impact craters and lobed ridges or rupes (steep slopes or cliffs), probably produced