The Message
The Message A sudden chill raised the hairs at his neck. It was time to be decisive .... The story begins. "22.35 hours! Juniors! Head out! Towards Objective! We have to isolate Object Anonymous, code Infinitive!" I had instructed my troops to head out, to locate the object known to have arrived from space, crashing into U. S territory in Nevada Desert area. My fellow members and I were being sent to investigate the object and transport it to headquarters at the Pentagon. We were based there, but had collected classified equipment from a base in Nevada itself, Area 51. We were an elite force of the U. S. A, definition code Y2K. The State Department in Washington D. C. confirmed our orders to the president who in turn ordered us to set course for the unknown object. It was a highly advanced mission for Area 51 to cope with, although it was only a couple of miles distant from their base. We were now at a three mile radius from the object, burdened with a mass of the most up to date, but heavy, sophisticated technology, as we had no details of the object: how it would be, what shape, how big, radioactive or not. We had no knowledge. So I told the boys to set up camp here, at three miles. I said, "Take care of the equipment, juniors! Leave your telecommunications at all frequencies on. Corporal Murray, sergeant Moore and I are heading to the object by ground. If the object
The Greenhouse Effect
The Greenhouse Effect About half of the Sun's energy is absorbed into the Earth's surface. The rest is either reflected back into space by the atmosphere or absorbed by dust and gas particles. The solar energy that does reach the Earth's surface heats the land and oceans. Successively, the land and oceans release heat in the form of infrared radiation. Carbon dioxide and methane have the ability to absorb some of the infrared radiation leading to warming of the lower atmosphere. Heat trapping gases similar to these are known as greenhouse gases. This absorption of heat, which keeps the surface of our planet warm enough to sustain us, is called the greenhouse effect. Without heat-trapping greenhouse gases in the air, the Earth's surface temperature would average a freezing -18°C, rather than 15°C. Burning of fossil fuels and land clearing during the past 200 years has led to a growth in the density of greenhouse gases in the atmosphere. This has led to an increase in the amount of infrared radiation that is captured by the atmosphere, which leads to an increase in the average temperature of the atmosphere, producing a run away greenhouse effect. Increased temperatures in the lower atmosphere are likely to produce changes to weather and climate world-wide. Therefore, the enhanced greenhouse effect is often referred to as climate change or global warming. The effects in
Solar Energy.
D. Vitcheva, E. Bennett, J. Fleury Solar Energy Energy is a vital factor and nothing can live and work without it. That's why the subject on energy is very much actual and a source of heated discussions. Many new projects are created by big organizations aiming the best exploitation of resources. Energy is divided into two types: renewable (or sustainable)-those can be exploited over and over again and non-renewable, which are scarce, finite. Examples for renewable energy are wind, solar, geothermal, hydroelectric energy. Examples for non-renewable energy are fossil fuels (coal, oil and natural gas), nuclear energy and fuel wood. However non-renewable resources are mainly the sources of our energy due to the cheaper price and the large quantities of energy they produce. But on the other hand nowadays we are concerned about their scarcity and the harm they cause on our environment. That's why we try to introduce progressively the use of renewable types of energy as solar energy for example. Sun is the primary source of the Earth's energy. Solar energy is produced by the Sun and is the result of nuclear fusion reactions. It propagates itself into our entire galaxy, and only a small amount of it reaches the Earth. Solar Energy is basically made of photons. In 1837, Claude Pouillet introduced the notion of a solar constant, which is the intensity of the solar radiation
The Solar System.
The Solar System The Sun DEFINITION The Sun is a star at the centre of the Solar System. All the planets revolve around it. ? The surface of this burning ball of gas is 5500ºC, with the core reaching a sweltering 15.6 million ºC ? The Sun is so large, you could fit over one million Earths inside it Mercury DEFINITION Mercury is the nearest planet to the Sun and the second smallest in the Solar System ? See the Sun rise twice in one day ? The widest range in temperature of any planet, from a chilly -170°C at night to a sizzling 350°C during the day NUMBER OF MOONS · 0 Venus DEFINITION The second planet from the Sun and the Earth's nearest planetary neighbour ? Experience the longest day of any planet, a staggering 243 Earth days! ? The only planet where the Sun rises in the west and sets in the east ? See volcanoes 100km wide and five km high ? Poisonous Venusian atmosphere - it's full of sulphuric acid NUMBER OF MOONS · 0 Earth DEFINITION The third planet from the Sun, placed between Venus and Mars ? The only planet in the Solar System where life has been confirmed ? The best nightlife in the Solar System! NUMBER OF MOONS · 1 Mars DEFINITION The fourth planet from the Sun, just past the Earth. Often called the 'Red Planet', due to its vivid colour. ? The longest ever canyon system, stretching over 5,000km (3,000 miles) ? Solar
The Solar System.
The Solar System Our solar system contains 9 planets Mercury, Venus, Earth, mars, Jupiter, Saturn, Uranus, Neptune and Pluto. Mercury, Venus, Earth and mars are known as the inner planets and Jupiter, Saturn, Uranus, Neptune and Pluto are the outer planets. All of the planets orbit our Star the Sun. The Sun The sun is 4.5billion years old; it could have over 1 million earths in it. The photosphere (the visible layer of the sun) is 6,000°C and in the core the temperature is 15,000,000°C. The sun has enough fuel to last for five billion years after that it will start to swell up and eventually swallow the earth in its heat. An eclipse of the sun is when the earth passes throw the moons shadow. The sun is a star; it is not as hot as the other stars because they are white hot. Mercury Mercury is the second smallest planet in the solar system; it is even smaller than some moons. Mercury is the closes planet to the sun. Mercury is as cold as -184o C at night and 427o C in the day. Mercury has no moons or rings. One Mercury year is 88 earth days long. Mercury was the roman god of eloquence, games of chance, commerce, and story telling, and was the messenger-god of Jupiter. Venus Venus is the closes planet to us and the second closes to the sun. It is the hottest planet the average temperature is 457o C. Venus is so bright that some times it looks like a star. The
The Solar System.
The Solar System The Solar System consists of o The Sun o 9 Planets o 65 Moons o Asteroids o Comets (less than 1,000 recorded, possibly more than a trillion trapped beyond Pluto) o Dust The Sun is the largest thing in the Solar System, with over 1,000 times the mass of everything else added together. It's the Sun's huge gravity that keeps all of the nine planets, their moons, the asteroids, the comets, and the dust between the planets all orbiting the Sun. It would take more than 100 Earths placed side-by-side to go from one edge of the Sun to the other. The Sun is a star, and shines because it generates light and heat by nuclear reactions in its core. The planets are much smaller than the Sun and shine by reflecting the Sun's light. In order of distance from the Sun, the planets are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. All of the planets travel in the same direction around the Sun in approximately circular paths. The planets fall into two general composition types: terrestrial and gas. The terrestrial planets are Mercury, Venus, Earth, and Mars. Generally, they are small, rocky bodies (lots of materials made of the elements silicon, oxygen, aluminium, magnesium, sulphur and iron) with thin atmospheres. The gas planets Jupiter, Saturn, Uranus, and Neptune are large, gas and liquid bodies with thick deep hydrogen-rich atmospheres
