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It is certain that there won’t be any life on earth once the sun gets burnt out and it starts expanding to form a red giant which will end the earth and solar system. This is estimated to happen in five billion years from now on. But that time is very far from us, so we don’t need to panic right now. Besides, the search for another shelter planet is going on with the rapid development in science and technology. The other thing that we should fear is about the changing climate and unpredictable weathers that we have been facing currently. It has certainly been a time to be serious about the preservation of earth and its atmosphere to keep our human kind alive.

People might have misunderstood the definition of climate change when they see some extreme winters and get confused that there is no such thing like global warming. It is well to be taken into account that the extreme winters and extreme summers are a part of climate change.

Leaving the talk about changing Earth, I want to talk about the changed Venus now. The other fact what we have is the planet Venus which is second nearest to the sun (Earth being the third). The composition of our mother planet and Venus planet is exactly the same. The major between the planets is the surface temperature and water percentage. It is believed that there used to be oceans and most probably life too. The water vapour layers can be seen on the surface of Venus which means that there was water on Venus. The other question left hereby is the amount of water. If the amount of water vapour in Venus' atmosphere let condensed to water and puddle onto its surface, it would create a global puddle 3 cm deep. Whereas in case of earth, the water on earth would create a global puddle of 3 km deep. However, this fact has to be corrected taken into account that Venus is losing its water vapour. Some millions years back, it might have more water vapour or even oceans too. Venus Express (group of scientists studying Venus) has confirmed that Venus has lost huge quantity of water into space. Therefore, there is a chance that oceans used to exist in the past.

Now let us see how the water has escaped into the atmosphere which will be interesting for us in Earth. As ultraviolet radiation from the Sun streams into Venus' atmosphere, it breaks up the water molecules into atoms: two hydrogens and one oxygen atom. Such continuous reaction transformed water to oxygen and hydrogen. These gases could easily escape to the atmosphere. This shows us that ultraviolet rays from the sun are the main reason for the loss of water on Venus. As a reason of ozone depletion, the water on the earth could face the same attack. The current surface of Venus is like a hot oven. It could be such that the surface was similar to ours in the past over there. I hope and wish that our earth will never be an hot oven. Let us preserve our earth and let preserve ourselves.

The society I am living is about 5 square kilometers in area. It takes probably an hour to go around. This society is just a small part of the city, and the city itself is a small part of the country. There are hundreds of such countries and thousands of such cities on the earth. I can't imagine how many hours or years will it take to visit around the earth. 

The other day I was browsing some images of telescopic views of space. At some point it was difficult to distinguish the microscopic pictures and the telescopics pictures. The planets and stars just seemed like bacterias when looking through a microscope. Our planet Earth was just one of those dots. There are millions and billions of such dots in the universe. All the evolution from the microorganisms to the human civilization happened in this small dot. Humans developed and invented several things in this small dot. Many wars were also fought in this small dot as well. There are infinity no. of events that happened in this small dot. This small dot is our planet Earth which is such vast and giant in our view. But the fact is that our Earth is just a dot, a micro-organism in the sea of galaxies. Our universe is really really elegant.


South Korea has lost contact with its Naro-1 rocket, just 137 seconds after take-off. Officials believe the rocket exploded.

Korea Aerospace Research Institute (KARI) and Khrunichev State Research and Production Space Center had hoped to use a Naro-1, South Korea's first carrier rocket, to launch a STSAT-2B satellite.

South Korea had postponed the launch on Wednesday due to problems with the rocket's fire extinguisher system. Science Ministry spokesman Pyun Kyung-bum said, "We expect that it will be difficult to launch today".

The rocket lifted off from Goheung's Naro Space Centre at 1701 (0801 GMT) today. The rocket apparently exploded 137 seconds after launch, when a flash was seen from an on-board camera and communication was lost. The loss of communication occurred when the rocket had achieved an altitude of around 70 kilometers (43 mi). Television cameras captured a white speck, presumably part of the rocket, falling into the sea.

Analysts say the failure is a setback for South Korea. If it had been successful, it would have been the first Naro-1 launch to reach orbit. The launch cost South Korea an estimated US$400 million, and if successful, would have launched a satellite called the STSAT-2B into orbit. The satellite was designed to examine climate change and its effects.

The incident is seen as a major setback for South Korea's space program, which had been aiming to become the 10th country to achieve the capability to launch satellites, and the fourth Asian country, after China, Japan, and India. A successful launch would have helped South Korea to become a player in commercial space launches, an industry valued at around US$250 billion. Since 1992, South Korea has launched 11 satellites from overseas sites with foreign-made rockets.

Chinese researchers have successfully built an electromagnetic absorbing device for microwave frequencies. The device, made of a thin cylinder comprising 60 concentric rings of metamaterials, is capable of absorbing microwave radiation, and has been compared to an astrophysical black hole (which, in space, soaks up matter and light).

The research published June 3 in New Journal of Physics (co-owned by the Institute of Physics and German Physical Society), shows how the researchers utilised the special properties of metamaterials, a class of ordered composites which can distort light and other waves.

Qiang Cheng and Tie Jun Cui of the State Key Laboratory of Millimeter Waves at Southeast University in Nanjing, China, designed and fabricated their absorbing device, officially called an "omnidirectional electromagnetic absorber," using 60 strips of circuit board arranged in concentric layers coated in copper. Each layer is imprinted with alternating patterns, which resonate or don't resonate in electromagnetic waves.

The designed device can trap and absorb electromagnetic waves coming from all directions by spiraling the radiation inwards and converting its energy into heat with an absorption rate of 99%. Hence it behaves like an "electromagnetic black body" or an "electromagnetic black hole."

At the moment, the device only works with microwaves, but the researchers are planning to develop a black hole for visible light next.

The current results could find some applications in microwaves. As the researchers write, "The good agreement between theoretical and experimental results has shown the excellent ability for metamaterials as the candidate to construct artificial omnidirectional absorbing devices.

"Since the lossy core can transfer electromagnetic energies into heat energies, we expect that the proposed device could find important applications in thermal emitting and electromagnetic-wave harvesting."

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