questionable topic – uneasy matters since 2008

Top 10 Most amazing facts about the Earth

Posted in amazing, facts by questionabletopic on Saturday, April 26, 2008

(замість прологу)

Маленький Нострадамус маме:
– Мама,а что у нас сегодня на обед?
– А то ты, сука, не знаешь…

так от, те чого я не знав:

Top 10 Most amazing facts about the Earth

1. Gravity is not the same over the surface of the Earth

It turns out that in some places you will feel slightly heavier than others. A low spot can be seen just off the coast of India, while a relative high occurs in the South Pacific Ocean. The cause of these irregularities is unknown since present surface features do not appear dominant. NASA‘s twin satellites, launched in March 2002, are making detailed measurements of Earth’s gravity field which will lead to discoveries about gravity and Earth’s natural systems.

2. Atmosphere ‘escapes’

Due to thermal energy, some of the molecules at the outer edge of the Earth’s atmosphere have their velocity increased to the point where they can escape from the planet’s gravity. This results in a slow but steady leakage of the atmosphere into space. Because unfixed hydrogen has a low molecular weight, it can achieve escape velocity more readily and it leaks into outer space at a greater rate. For this reason, the Earth’s current environment is oxidizing, rather than reducing, with consequences for the chemical nature of life which developed on the planet. The oxygen-rich atmosphere also preserves much of the surviving hydrogen by locking it up in water molecules.

3. The Earth is slowing down

As a result of variation in gravitational forces due to the moon, the sun and other planets in the solar system, displacements of matter in different in different parts of the planets and other excitation mechanisms, the rotational speed of the Earth about it’s axis varies in time. Recently, days have been getting shorter by hundredths of a second, which implies that the angular velocity of the Earth has been increasing. The factors causing this increasing in the Earth’s rotational velocity have not been determined. The rotation data shows oscillations over several different timescales. The one with the largest variation is seasonal: Earth slows down in January and February.
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