Near Earth Objects Essay

1977 words - 8 pages

Abstract
The Earth is under continuous assault by extraterrestrial objects, many of which are too small to pass through the atmosphere. However, those large enough will cause devastating effects and thus it is important to defend against them. The first step for defense is survey and detection for Near-Earth Objects (NEOs), current initiatives such as the Spaceguard Effort and telescopic systems are currently in place, and future detection efforts will enable us to detect smaller NEOS. The mitigation strategies of Kinetic Impactors and Solar Collectors are looked at. The Kinetic Impactor is simple and effective and available with today’s technology while solar collectors although promising, wont be available till the necessary technology is available in the future.
Introduction
Under continual bombardment by cosmic objects, our Earth is in a dangerous place. Although the vast majority are tiny and burn up in the atmosphere before reaching the ground, larger objects are capable of penetrating the atmosphere with potentially devastating effects. Evidence of collisions is abundant on the crater ridden surfaces of mercury and the moon1, both of which have neither atmosphere to protect against smaller objects nor volcanism to reshape its’ surface.
On earth, the threat and danger of near-Earth objects (NEOs) is real, most notably is the object in 1908 that annihilated 2000 square kilometers of Siberian forest1, 2. The object in question, which the explosive force of 12.5 megatons of TNT was only 60-meters in diameter2. Although considered small in size and presenting threat to a limited area, the explosive force of a similar sized NEO in an urban area would cause hundreds of thousands of deaths. NEOs with diameters, one kilometers or more can possibly cause global devastation and although chance of occurrence is extremely low, the results would be catastrophic1, 2, a classic case of the “zero times infinity” problem1. Figure 1 well illustrates the negative relationship between NEO impact frequency and NEO size.
Consequences of NEO impacts depend on factors such as mass, density, impact angle and relative velocity with respect to the Earth3. Major impacts would have immediate effects such as blast, firestorms, severe acid rain, the creation of pyrotoxins and the eradication of the ozone layer2. Such impacts could also trigger volcanic and seismic activity leading to greater environmental disaster2. Sudden climate change can also occur with a great amount of dust and debris is agitated and thrown into the atmosphere, blocking out the sun3. Major impacts at sea would devastate coastal regions with a massive impact-induced tsunami2,3 . Any one of these events are likely to be considered doomsday scenarios but they can be prevented through the defense against NEOs. Defense of the earth against Near-Earth Objects (NEOs) can be achieved through survey and detection of NEOs, current mitigation strategies such as kinetic impactors and through...

Find Another Essay On Near-Earth Objects

Philosophy: Everything in Nature Has an Explanation

1411 words - 6 pages vs. The Physics of Galileo) Another groundbreaking concept introduced by Aristotle was his belief that objects only moved as long as a force was applied to it. This coincided with his other beliefs of Earth operating on different principles than the Heavens. Because of this, on earth, objects stopped moving once the force applied upon them disappeared. But in the Heavens, however, he explained their continuing motion was due to a God-like entity

The Sun Essay

1235 words - 5 pages and sunspots have an indirect but substantial impact. Although sunspots, dark areas on the Sun, do not directly affect life on Earth, the magnetic field producing them does. Plasma near a magnetic field can burst out causing solar flares that send energetic particles, x-rays, and magnetic fields (geomagnetic storms) to Earth. Earth has a magnetic field of its own that normally protects it from these onslaughts, but when sunspot activity is

The Big Bang Theory- excellent essay, got a very very good mark

3623 words - 14 pages theory allows for bangs at widely spaced locations with irregular timing, but does not preclude multiple explosions at the same site.Let us imagine for a moment what took place at the time of the Big Bang. Matter was flung outward in every direction, with varying degrees of force, depending on where in the explosion's nucleus it originated. This means that matter would be spewed out at a wide range of speeds. Objects near Earth have very little shift

Space Exploration

651 words - 3 pages stars outside Earth in all ages. Ancient astronomers observed the objects planets and named them after Roman deities. During the European Renaissance, fundamental physical laws governing planetary motion were discovered, and the orbits of the planets around the sun were calculated. In the 17th century, the Italian astronomer, Galileo, built a telescope to look closely at the moons and planets. The years since 1959 have amounted to a golden age of

The Hubble Telescope

950 words - 4 pages different filters that let scientists study multiple wavelengths of light from ultraviolet to near-infrared light. The Wide Field/Planetary Camera used electronic detectors to record all of the images. It had four small high tech circuitry called Charge-Coupled Devices, the devices could see objects nearly 1,000 million times fainter than the naked eye could see. These four devices each contain 640,000 pixels and the light collected by each pixels is

evolution

633 words - 3 pages Intelligent Design is the scientific theory that there is no explanation of the Earth’s natural beauty, just that an almighty creator designed the earth the way it is. Evolution is the scientific theory that all living things have evolved over time through a natural process. The debate between the two theories has been going on ever since 1859 when Charles Darwin released his book called The Origin of Species. Before Darwin published his work

Understanding Eclipses

691 words - 3 pages Understanding Eclipses A scientific event which captures my interest and attention is an eclipse. In astronomy, an eclipse is a complete or partial obscuring of a celestial body by another. An eclipse occurs when three celestial objects become aligned. There are two distinctly different types of eclipse phenomena known to astronomers. In the first, the eclipsing body comes between an observer and the eclipsed object while the other

Science in the Renaissance: my essay talks about the discoveries that da Vinci and Galileo made. I compared and contrasted their discoveries to Aristotlean theory and each other.

3319 words - 13 pages orbited the Earth.Johannes Kepler (1571-1630), one of Brahe's best students, studied his teacher's theories and tried to improve them, but in doing that, also disproved them. He discovered that all the planets except Earth orbited the Sun in an ellipse, not a circle. This was the best explanation of why the Sun and other planets appeared near and far from the Earth. He also demonstrated a precise mathematical relationship between the planets' speed of

Kessler Syndrome

1447 words - 6 pages scratch the surface of the problem. To address this issue, we need to change the way we operate in space, we need to make sure our debris either falls back to Earth or goes off into outer space. The force of impact debris causes is immense, the bigger the debris the bigger the impact and the more debris made. Objects that collide with each other in space break into smaller objects, etc. This causes the problem to increase even if we stop

Black Holes.

888 words - 4 pages . Scientists have also discovered that they are made of the remains of supernova explosions. If a black holes was to form near enough to the planet Earth, it would begin to suck all the nearby objects into its event horizon and once it got massive enough it could even suck Earth into a hole the seize of a pin point and could destroy all human life. Obviously, that hasn't happened yet. And let's pray that it doesn't happen anytime in the near future.

Be it resolved that Space Exploration is a Pointless Endeavour. (CON)

598 words - 2 pages Mr. Speaker,Neil Armstrong once said, "That's one small step for a man, one giant leap for mankind," after he became the first man to reach the moon. He certainly thought space exploration was a great idea ... and why isn't it? Space exploration is absolutely necessary to humans. Without space exploration, this world would not be near as advanced as it is today. Without space exploration, where could humans go if a nuclear war arises? Without

Similar Essays

A Meteor Will Strike The Earth And Destroy All Life Forms

1179 words - 5 pages “redirect this huge meteor. The thing with that option is that NASA will have to identify any Earth threatening objects ten to twenty years before impact so they can shift it a few millimeters laterally per second during it’s course of travel. If they do identify one though, they would have to send a spacecraft to it and set off an explosion, causing the meteor to veer off course of Earth. But for the meteors we discover a few months before

The Big Bang How The Universe Began

998 words - 4 pages Question 1a) Infrared AstronomyInfrared Astronomy is a study of the Infrared Radiations emitted from celestial objects. All objects from trees, buildings on the earth to distant galaxies emit infrared radiation. The cosmic dust particles block the view of the visible universe such as the center of the Milky Way but these cosmic dust particles are transparent in the Infrared Radiation wavelengths. It is very significant for studying asteroids

Magnetism Essay

627 words - 3 pages heat of sunspots and in the molten core of the Earth.Magnetism also has Field Lines, measured by a compass needle freely suspended in three dimensions, near a magnet or an electrical current. In the side facing the Sun, filed lines are compressed earthward, while on the night side they are pulled out into a very long "tail", like that of a pooper comet. Near Earth, however, the lines remain very close to the "dipole pattern" of a bar magnet. The

Brown Dwarfs Essay

551 words - 2 pages This article was published on the Scientific Daily on the 23rd of December. It was about the discovery of two brown dwarfs by scientists Alex Wolszczan, Evan Pugh, and Penn State. Brown dwarfs are objects in space that sit between the lines of being a star and a planet. This object is dim and hard to distinguish from low mass stars at the early stages of the dwarf’s life. They are often called failed stars because they start their life the