The Geology of the Moon Approximately 4.5 billion years ago a large asteroid struck Earth and thus resulted in the Moon. This impact theory suggests that the collision ejected raw materials which in time became the Moon. With the Moon having no significant atmosphere, it can reserve a good record of the impact history. This information can provide geologists with clues to the history of the Earth. The crust of the Moon is composed of a variation of primary elements, including uranium, oxygen, thorium, potassium, silicon, magnesium, iron, titanium, calcium, aluminum and hydrogen.
Although very thin, Mercury’s atmosphere is made up of trace amounts of gasses including 42% Oxygen, 29% Sodium, 22% Hydrogen, 6% Helium, and 0.5% Potassium. Mercury’s location in the solar system makes it difficult at best to hold at atmosphere as it is in such close proximity to the sun. The atmosphere would only be there for a short amount of time before being blasted off my solar winds, meteoroid bombardment and outgassing (the gas escapes into the
Chemical propulsion is the only way to get spacecraft from the surface of the planet but once in space, it’s a different story. Nuclear propulsion is vastly superior to chemical propulsion. The reason that nuclear propulsion is better is because it has a higher specific impulse or Isp. Absolute Astronomy’s definition of Isp is a way to describe the efficiency of rocket and jet engines. (“Specific Impulse”, n.d.).
But with the earth being three times more massive than the moon, it is able to stay in place. Since the moon’s gravitational pull isn’t great enough to pull Earth closer, it grabs a hold to the ocean. This creates a tidal bulge in the direction of the moon and on the opposite side as well. This is where the high tides and low tides are distinguished. When the moon is aligned with the sun, spring tides are created making the high tides more dramatic.
These estimates are used largely to guess the mass of asteroids and comets. They are just general guesses made when there is no other information available to help determine the mass. These guesses are more accurately formed as the objects pass by other massive objects like planets where the effect of the planets mass on the direction of the object and the speed of the object can lead to a much more accurate predictor of mass. In no case is an objects spin used in the equations to determine mass. Only the rate at which other objects spin around it.
Lake Vostok makes it even more difficult to explore because of it’s climate. That is exactly why scientists are trying to seize the opportunity and just find out even more about the desolate terrain of the Antarctic. Not only does its bleak menacing environment provide us with many different possibilities of new living life forms, but Lake Vostok also provides us with some information about Jupiter’s moon Europa. It’s astonishing how NASA itself does everything in it’s power, with all of the technology to find out there is other living life forms in our solar system. But the answer can lie right in front of our very own eyes, because the climate on Lake Vostok is similar to that of Europa’s.
Spitzer Space Telescope Make It bigger! Make it better! Telescopes have been around since the sixteen hundred’s; why not build a bigger better telescope in space! Space has always been a place of wonder for the human race. Objects appear to be close but are often many light years away from earth.
These types of lava are very viscous due to its high silica content. This is because the lava rises from the subduction zone through continental lithosphere which has a low density and is filled with air spaces containing gases which become incorporated into the lava. This very viscous lava often blocks off vents of volcanoes and when the pressure building up in the vent is eventually released, the top of the volcano can be blown off leaving a huge crater, such as in the 2002 eruption of Mount Etna in Sicily. When the two plates involved are oceanic, explosions tend to be less violent than this as the melted lithosphere which forms the lava is denser and so contains fewer gases. At constructive boundaries where plates are moving apart from one another, basaltic lava is erupted between the gaps.
Its magnetic field indicates large amounts of molten nickel and iron in outer core. The moon lacks a hydrosphere/atmosphere/magnetosphere. Tides occur cause a tidal bulge which is the difference in the moon and earths gravitational force. Spring tides=high tide, neaptide=low tides. Highest and lowest tides occur during new and full moons.
Our atmosphere stores gases, known as greenhouse gases, like water vapor, carbon dioxide, methane gas, fluorinated gases, and nitrous oxide. These greenhouse gases trap some of the radiation which warms our planet to allow humans, plants and animals to survive. The dramatic changes to the climate from greenhouse gases is not a natural process which is why the climate changes are such a big issue . Throughout the history of the earth natural climate changes have been known to occur over thousands of years due to the Earth’s orbit and the exposure to the sun. That fact is actually used in arguments for people that believe global warming is a myth.