Why is the sun hot ?

Why is the Sun hot ?

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Why is the sun hot?,  now before you jump on the comments and say “because it’s the sun, stupid” think about it, our sun is basically a giant nuclear reactor at the centre of our solar system but not like the ones on earth. They create energy by nuclear fission, that is they split large atoms like uranium into smaller lighter ones and in the process it releases large amount of energy. Atomic bombs also work in the same way which is why they are so destructive. The sun creates its energy by nuclear fusion, the most efficient way to …

Why cant you fly a plane into space?

Why can’t we fly a plane into space ?

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  Why can’t we fly a plane into space, what stops it from just flying higher and higher until we are in space? Well, there a several issues but assuming we are in something like a normal jet airliner, then one of the main problems is the air or lack of it as we get closer to space. A plane flies because as it is propelled forward, the wings, which are shaped to make the air flow faster over the top of them than the bottom, generate lift. As the plane goes faster the wings creates more lift and when the …

Apollo, the Lunar Dust and NASA's Dirty Problem

Apollo, the Lunar Dust and NASA’s Dirty Problem

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Sometimes the smallest things can be one of the biggest headaches. During the Apollo missions of 1969 to 72,  the tiny particles of lunar dust turned out to be a major issue. Described as being as fine as talc but as rough as sandpaper, it also has properties that make it dangerous for both men and machines and has been cited as a bigger problem for future astronauts than radiation by some scientists. The lunar surface is covered in a thin layer of dust which has been created by the bombardment of meteorites and micrometeorites over millions of years. These …

7 Key Inventions that Made the Modern World

7 key Inventions that Made the Modern World

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The modern world is filled with amazing inventions but as newton stated “If I have seen further, it is by standing on the shoulders of giants” and this applies to the 7 key inventions in this video, which if any one of these had not occurred, our modern world would look very different to how we see it today. No 1. The Electrical generator This first invention is probably the most fundamental of all the ones here, for without this, all but one of the following inventions would not have been possible. Electricity had been known about since greeks and …

5 Reasons Why We Cant Find Aliens - The Fermi Paradox

5 Reasons Why We Cant Find Aliens – The Fermi Paradox

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One of the biggest questions and indeed paradoxes that man has pondered on is the fermi paradox. This is, that despite there being billions of other stars with earth like planets out there, where are the signs of life from all the other alien civilisations that should statistically exist. So far we have found nothing to prove that intelligent life exists anywhere else other than here on Earth. In this video we’ll look at 5 reason why we can’t find any aliens. Earth Isn’t As special As We like to Think We humans do tend to hold ourselves in high …