User:P0531pj102

apophis since man has benn studying for astroids man has found over 100,000 of them. but one astroid was discovered at the end of 2004 ok so it was a new astroid but when you put the numbers in so you can see it in the feuture. they found out that this astride on firday,13 april 2029 will come so close to earth that it will be able to dip bellow our satulie communaticans. then seven years later then if it passes through a key hole 300,000 miles wide then 7 year latter it will return and then hitting earth in 2036.

what would it do? if apophis dose hit the earth then it would cause the worst inmagionable thing in recorded history. it wouls wash away a larg chunk of calaforna. but apophis isent big enough to wipe us out compleatly. but there is a 99.2% chance that apophis would not hit earth. Possible impact effects what would it do #2 Area where the asteroid could have impacted on Earth.NASA initially estimated the energy that Apophis would have released if it struck Earth as the equivalent of 1480 megatons of TNT. A later, more refined NASA estimate was 880 megatons. The impacts which created the Barringer Crater or caused the Tunguska event are estimated to be in the 10-20 megaton range. The 1883 eruption of Krakatoa was the equivalent of roughly 200 megatons.

An impact winter is a period of prolonged cold weather caused by the impact on the Earth of a large asteroid or comet. If such an impact occurred on land or the floor of a shallow sea, it could cause large amounts of dust or ash to be thrown into the Earth's atmosphere, blocking the Sun's light and dramatically lowering the amount of sunlight reaching the earth's surface. Impact winter is one of the mechanisms proposed for extinction events, such as the asteroid impact at Chicxulub in Mexico which supposedly led to the extinction of the dinosaurs.

Depending on the size of the object, and the location and angle at which it hits the earth, material can be thrown into the atmosphere by two mechanisms:

The impact could eject large amounts of regolith (and perhaps shattered bedrock) into the atmosphere The impact could produce a global firestorm or strike a heavily forested area, throwing up large amounts of smoke and ash into the atmosphere. The latter scenario is the more dangerous, as the lighter particles from the fire would take weeks or months to fall back to earth, and could be distributed by jet streams around the world, making the cooling a global event.

The mechanism of impact winter is very similar to that which occurs after nuclear war, leading to nuclear winter. Volcanoes also eject large amounts of opaque material into the higher parts of the atmosphere, with large explosions such as the 1991 explosion of Mount Pinatubo and the much larger 1783 Laki eruption, having measurable effects on the world's climate. The simultaneous eruption of a number of large volcanoes, a catastrophic volcanic winter scenario, is another proposed mechanism for extinction events.

The exact effects of any impact would have varied based on the asteroid's composition, and the location and angle of impact. Any impact would have been extremely detrimental to an area of thousands of square kilometres, but would have been unlikely to have long-lasting global effects, such as the initiation of an impact winter.

what are we doing to pervent this? nasa crew ed lue and stan love they can may just save the planet. they say with enought worning they can send a large enough ship and go to it and use the ships gravity to slitly shift the mateor off of its course.

Discovery Apophis was discovered on June 19, 2004, by Roy A. Tucker, David J. Tholen, and Fabrizio Bernardi of the NASA-funded University of Hawaii Asteroid Survey from Kitt Peak National Observatory in Arizona. This group observed for two nights. The new object received the provisional designation 2004 MN4.

On December 18, the object was rediscovered from Australia by Gordon Garradd of the Siding Spring Survey, another NASA-funded NEA survey. Further observations from around the globe over the next several days allowed the Minor Planet Center to confirm the connection to the June discovery.

[edit] Naming When first discovered, the object received the provisional designation 2004 MN4 (sometimes written 2004 MN4), and news and scientific articles about it referred to it by that name. When its orbit was sufficiently well calculated it received the permanent number 99942 (on June 24, 2005), the first numbered asteroid with Earth-impact solutions (to its orbit determination from observations). Receiving a permanent number made it eligible for naming, and it promptly received the name "Apophis" as of July 19, 2005. Apophis is the Greek name of the Ancient Egyptian enemy of Ra: Apep, the Uncreator, a serpent that dwells in the eternal darkness of the Duat (underworld) and tries to swallow Ra during His nightly passage. Apep is held at bay by Set, the Ancient Egyptian god of Chaos.

Although the Greek name for the Egyptian god may be appropriate, Tholen and Tucker (two of the co-discovers of the asteroid) are reportedly fans of the TV series Stargate SG-1. The show's main antagonist in the first several seasons was an alien named Apophis who took the name for the Egyptian god and sought to destroy Earth.[3].