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12-12-2012, 04:51 AM
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#1
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BANNED
Join Date: Dec 10, 2012
Location: Eccie
Posts: 47
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Venue Earth: Are You Prepare
Source From Wiki.
Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets. It is sometimes referred to as the world, the Blue Planet,[22] or by its Latin name, Terra.[note 6]
Earth formed approximately 4.54 billion years ago, and life appeared on its surface within one billion years.[23] Earth's biosphere then significantly altered the atmospheric and other basic physical conditions, which enabled the proliferation of organisms as well as the formation of the ozone layer, which together with Earth's magnetic field blocked harmful solar radiation, and permitted formerly ocean-confined life to move safely to land.[24] The physical properties of the Earth, as well as its geological history and orbit, have allowed life to persist. Estimates on how much longer the planet will be able to continue to support life range from 500 million years (myr), to as long as 2.3 billion years (byr).[25][26][27]
Earth's crust is divided into several rigid segments, or tectonic plates, that migrate across the surface over periods of many millions of years. About 71% of the surface is covered by salt water oceans, with the remainder consisting of continents and islands which together have many lakes and other sources of water that contribute to the hydrosphere. Earth's poles are mostly covered with ice that is the solid ice of the Antarctic ice sheet and the sea ice that is the polar ice packs. The planet's interior remains active, with a solid iron inner core, a liquid outer core that generates the magnetic field, and a thick layer of relatively solid mantle.
Earth interacts with other objects in space, especially the Sun and the Moon. During one orbit around the sun, the Earth rotates about its own axis 366.26 times, creating 365.26 solar days, or one sidereal year.[note 7] The Earth's axis of rotation is tilted 23.4° away from the perpendicular of its orbital plane, producing seasonal variations on the planet's surface with a period of one tropical year (365.24 solar days).[28] The Moon is Earth's only natural satellite. It began orbiting the Earth about 4.53 billion years ago (bya). The Moon's gravitational interaction with Earth stimulates ocean tides, stabilizes the axial tilt, and gradually slows the planet's rotation.
The planet is home to millions of species, including humans.[29] Both the mineral resources of the planet and the products of the biosphere contribute resources that are used to support a global human population.[30] These inhabitants are grouped into about 200 independent sovereign states, which interact through diplomacy, travel, trade, and military action. Human cultures have developed many views of the planet, including its personification as a planetary deity, its shape as flat, its position as the center of the universe, and in the modern Gaia Principle, as a single, self-regulating organism in its own right.
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12-12-2012, 06:45 AM
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#2
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Valued Poster
Join Date: Mar 31, 2010
Location: Houston
Posts: 15,054
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Well, yeh, and in about another billion years, give or take, the Sun will start to use up its nuclear fuel, (Hydrogen), and grow cooler, but in the proccess start to expand untill it completely engulfs the rest of the solar system all the way to the astroid belt.
Has anybody started to prepare for that?
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12-12-2012, 08:06 AM
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#3
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Account Disabled
Join Date: Apr 7, 2010
Location: Texas
Posts: 5,249
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Quote:
Originally Posted by Jackie S
Well, yeh, and in about another billion years, give or take, the Sun will start to use up its nuclear fuel, (Hydrogen), and grow cooler, but in the proccess start to expand untill it completely engulfs the rest of the solar system all the way to the astroid belt.
Has anybody started to prepare for that?
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If they haven't, it is Obama's fault. Will he still be President when the sun burns out? Because that's gonna be his fault too.
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12-12-2012, 06:13 PM
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#4
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Valued Poster
Join Date: Mar 30, 2009
Location: Hwy 380 Revisited
Posts: 3,333
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Hi, Glenna - who ARE you?
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12-12-2012, 06:16 PM
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#5
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Valued Poster
Join Date: May 20, 2010
Location: Wichita
Posts: 28,730
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Just in case, I'm stocking up on sunscreen.
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Quote
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12-12-2012, 08:28 PM
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#6
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Premium Access
Join Date: Dec 18, 2009
Location: Mesaba
Posts: 31,149
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Thanks for the science lesson, but
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12-12-2012, 11:32 PM
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#7
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Valued Poster
Join Date: Jan 3, 2010
Location: Clarksville
Posts: 60,894
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Quote:
Originally Posted by Chica Chaser
Thanks for the science lesson, but
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Excellent!
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12-13-2012, 12:49 AM
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#8
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Premium Access
Join Date: Dec 18, 2009
Location: Mesaba
Posts: 31,149
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That should be WTF's new avatar
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12-13-2012, 05:11 AM
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#9
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Valued Poster
Join Date: Jan 3, 2010
Location: South of Chicago
Posts: 31,214
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Quote:
Originally Posted by Chica Chaser
That should be WTF's new avatar
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+1
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