Wednesday, June 17, 2020
Alien Base in Nevada
Tuesday, June 16, 2020
Space Exploration
Monday, June 15, 2020
Outer space Mission
Sunday, June 14, 2020
Universe
The Universe
Welcome to the Universe. We will start with Tyrion Lannister of physics - The Planck Length which is the smallest thing you can sensibly talk about. And... next stop is our subatomic partical and meet our first neutrino. There are around 65 billion of them passing through just 1 square cm of Earth every second. Up next - we bump into quarks. These come in several flavours: Up, Down, Strange, Charm, Top and Bottom. These are about as close to the building blocks of nature as we have managed to get so far. Next stop - we get to the A-list celebritites of subatomic world Neutron and Proton usually they engage in three ways: With Electron and a kinky arrangement known as atoms .Funny thing about subatomical particles: Sometimes they behave as waves,other times as particles depending on how they are feeling and whether or not are they in mood .Which brings us to some more celebrities you have heard of Such as Helium, Hydrogen, Carbon and Cesium and all of this stuff we study in periodic table.
So far and everything in the universe is controlled by 4 forces: The Strong Force, which generally binds quarks, protons and neutrons together. Then there's weak force, which regulates radioactive decay. The electromagnetic force, which holds atoms and molecules together basically... And finally - Gravity. It was the promiscuous hussie of physics and regulates everything else like Universes.
We'll get to there later All the stuff is contained in a neat little package called The Standard Model and is about as close to a theory of everything we've managed to get so far. Generally, the little stuff comes under a title Quantum Physics and a big stuff, to which we get to in a moment, is known as Relativistic Physics Scientists are working very hard on getting the two of them to move in together but currently they have severe commitment issues.
Moving a bit further up we get to the code of life Deoxyribonucleic acid, also known as DNA. DNA is made of a sneeze called ATCG Or Adenine, Thymine, Cytosine, Guanine depending on how these are arranged we can get anything from Ebola virus to Papyrus, to the German Iris to Miley Cyrus .Up some more now we get the Cells top favourites including Red Blood, White Blood, Dendritic and soft. The next level above that should be familiar this is where we find raindrops, Blue Whales, hakisaks, Redtube, the human race as well as subway . Out a little further now we are looking down on all of human history Including all of our insecurities, morgage repayments and ex-emotional times. M
Moving on we get to the eight planets and 146 moons of our Solar System which doesn't count Pluto Because you are not a planet. Then there's the Sun, which is a four and a half billion year old burning ball of Hydrogen and Helium several billion years from now The Sun will rage quit and turn into a red giant gobbling whatever is left of a planet by then out again, we find the Milky Way.
The Milky Way contains at least a 100 billion stars. Stars can be by themselves, or orbiting each other called a Binary Star System Or occasional group of three, which is called a Trinary/Ternary Or Ménage a star and that's not all . There's the Nebulae, which is a little starry womb where a lots of stars are born Moons, which either come from planets or are a random floating matter And comets, meteors and a million other types of astronomical bodies that there simply isn't time to talk about. At the center of our galaxy And lots of other galaxies, are Black holes ,these are enourmous wells of gravity that suck matter in and distort time. Fun fact: If you'd hold your breath while falling into a black hole You would die, obviously And then there's the rest of the Universe.
The Milky Way, our galaxy, is one of a list of hundred billion galaxies each one prettier than the last since there are a 100 billion galaxies with at least a 100 billion stars in them That means there are at least 10 000 000 000 000 000 000 000 (do the math) stars In the Universe.
The Universe itself, as far as we are aware, is about 95 billion lightyears across or to put it in another way.If you are travelling with the speed of light 300,000 kilometers per second it would take you 95,000,000,000 years to get from one side to the other except for the fact that the Universe is expanding And the expansion is getting faster which literally makes no sense.
And a...That's... that's about it really. Oh! except there might be Parallel universes And hidden dimensions of space And we completely forgot about Time. The Universe began, if you can call it that, about 14 billion years ago (the Big Bang) . The first few galaxies turned up a few hundred million years later. A few hundred millions after that we get the Milky Way and another few and you've got a very young Earth, then oceans, then life a bit later Reptiles and the Dinosaurs Game over for dinosaurs. Evolution of hominids And finally all of our bullsh*t here. Anyway Nothing means anything and we all are going to die.
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Friday, June 12, 2020
Into the Space
Sputnik - The Spark of the Space Fire
It all begun on October 4th in year 1957, when the Soviet Union successfully launched Sputnik I, the world's first artificial satellite. Sputnik was about the size of a beach ball (58 cm. in diameter), weighing only 83.6 kg. , which took about 1 hour and 38 minutes to orbit the Earth on its elliptical path. That launch initiated many new political, military, technological, and scientific developments. The Sputnik launch was a single event that spark started the Space Fire and the U.S.-U.S.S.R Space Race.
The story begun in 1952, when the International Council of Scientific Unions decided to term the period from July 1, 1957, to December 31, 1958, as the International Geophysical Year (IGY) because of the fact that the cycles of solar activity would be at a high point then. In October 1954, the council passed a resolution aiming for artificial satellites to be launched during the IGY to map the Earth's surface.
In July 1955, the White House put forward plans to launch an Earth-orbiting satellite for the IGY and start looking for proposals from various Government research agencies to undertake development. In September 1955, the Naval Research Laboratory's Vanguard proposal was chosen to be used by the U.S. during the IGY.
The Sputnik launch changed everything. As a technological achievement, Sputnik caught the world's attention and the American public off-guard. Its size was more impressive than Vanguard's intended payload of 1.58 k.g.. In addition,It created a fear among people about the Soviet's ability to launch satellites also translated into the capability to launch ballistic missiles that could carry nuclear weapons from Europe to the U.S.
Then the Soviets struck again; on November 3, Sputnik II was launched, carrying a much heavier payload, including a dog named Laika.
Initially after the Sputnik I launch in October 1957, the U.S. Defense Department responded to the political excitement by approving funding for another U.S. satellite project. As an alternative to Vanguard simultaneously, Wernher von Braun and his Army Redstone Arsenal team began work on the Explorer project. On January 31, 1958, the wind flow changed, when the United States successfully launched Explorer I. The Explorer program continued as a successful ongoing series of lightweight, scientifically useful spacecraft. This satellite Explorer 1 carried a small scientific payload that eventually discovered the magnetic radiation belts around the Earth, named after principal investigator James Van Allen.
In July 1958, Congress passed the National Aeronautics and Space Act (commonly called the "Space Act"), which created NASA as of October 1, 1958 from the National Advisory Committee for Aeronautics (NACA) and other government agencies. Thus, the Sputnik launch also led directly to the creation of National Aeronautics and Space Administration (NASA).
This metal arming key is the last remaining piece of the Sputnik 1 satellite. It prevented contact between the batteries and the transmitter prior to launch. Currently on display at the Smithsonian National Air and Space Museum.
Wednesday, June 10, 2020
Astronomical Discoveries
Some astronomical discoveries from ancient Greece
The Histories by Herodotus (484BC to 425BC) offers an unforgettable loop into the world as it was known to the ancient Greeks in the mid-fifth century BC.The Greeks were always ahead in the field of education, science and technology.
The greeks didn't stepped back in the field of astronomy also.
Here are the few great Astronomical observations by the ancient Greeks that were proved right and amazed the world by their discoveries and observations. All these observations were first taken as mare jokes and flukes but later on they proved to be absolutely true and layer on develped to the facts we know.
The planets Orbit the Sun
About a few centuries later, there had been a lot of progress. Aristarchus of Samos (310 B.C. to 230 B.C.) argued that the sun was like the “central fire” for the cosmos and placed all of the then known planets in their correct order along with the correct distance around the sun. This is the earliest known heliocentric theory of the solar system.
Unfortunately, the original text in which he made the argument has been lost in history, so it cannot be know for certain how he worked it out. Aristarchus knew the sun was much bigger than the Earth as well as the moon, and he may have supposed that it should therefore have the central position in the solar system.
Nevertheless it ws a jaw-dropping finding, especially when it is considered that it wasn’t rediscovered until the 16th century, by Nicolaus Copernicus, who even acknowledged Aristarchus during the development of his own work.
The size of the Moon
One of Aristarchus’ books that did survive was about the sizes and distances of the sun and moon. In this remarkable treatise, Aristarchus put forward the earliest known attempt of calculations of the relative sizes and distances to the sun and moon.
It had long been observed that the sun and moon appeared to be of the same apparent size in the sky, which is clearified by the fact that the sun was further away. They realized this from solar eclipses, caused by the moon passing in front of the sun at a certain distance from Earth.Also, for an the instant when the moon is at first or third quarter, Aristarchus reasoned that the sun, Earth, and moon would form a right-angled triangle.
Pythagoras had already determined how the lengths of a triangle’s sides were related a couple of centuries earlier, Aristarchus used the triangle to idealise the distance to the sun was between 18 and 20 times the distance to the moon. He also estimated that the size of the moon was approximately one-third that of Earth, based on careful observation on the timing of lunar eclipses.
While his estimated distance to the sun was much low (the actual ratio is 390), on account of the lack of telescopic precision available at that time, and the value for the ratio of the size of the Earth to the moon is surprisingly accurate (the moon has a diameter 0.27 times that of Earth).
Today, we know the size and distance to the moon accurately by a variety of means, including precise telescopes, radar observations and laser reflectors left on the surface by Apollo astronauts. But these observations by Aristarchus at that time were surprisingly amazind and gazing and even these days they are valid to some extent.
The Earth's Circumference
Eratosthenes (276BC to 195 B.C.) was the chief librarian at the Great Library of Alexandria and a keen experimentalist. Among his many great achievements ,he also got the credit of the earliest known calculation of the circumference of the Earth. Pythagoras is generally regarded as the earliest proponent to propose the fact of a spherical Earth, although didn't put anything about its size. Eratosthenes’s famous and yet simple method had relied on measuring the different lengths of shadows cast by poles stuck vertically into the ground, at midday on the summer solstice, at different latitudes.
The sun is enough far away that, wherever its rays arrive at Earth, they are considerably parallel, as had previously been shown by Aristarchus. So the difference in the shadows demonstrated how much the Earth’s surface curved. Eratosthenes used this to estimate the Earth’s circumference to a great approximity of 25,000 miles (40,000 km). This is within a couple of percent of the actual value, as established by modern Geodesy (the science of the Earth’s shape).
Later on , another scientist called Posidonius (135 B.C. to 51 B.C.) used a slightly different method and arrived at almost exactly the same answer. Posidonius lived on the island of Rhodes for much of his life. There he observed the bright star Canopus would lie very close to the horizon. However, when in Alexandria, in Egypt, he noted Canopus would ascend to some 7.5 degrees above the horizon.
Given that 7.5 degrees is 1/48th of a circle, he multiplied the distance from Rhodes to Alexandria by 48, and arrived at a value also of approximately 25,000 miles (40,000 km).Which also supports Aristarchus experiment and observations.
The first Astronomical Calculator
The world’s oldest surviving mechanical calculator is the Antikythera Mechanism. The amazing device was discovered in an ancient shipwreck of the Greek island of Antikythera in 1900.
The device had now been fragmented by the passage of time, but when intact it would have appeared to be a box housing dozens of finely machined bronze gear wheels in it. When manually rotated by a handle, the gears spun dials on the exterior showing the phases of the moon, the timing of lunar eclipses, and the positions of the five planets (Mercury, Venus, Mars, Jupiter, and Saturn) known at that time at different times of the year. This even gave an account for their retrograde motion – an illusionary change in the movement of planets through the sky.
There is no clear proof an finding about who built it, but it dates to some time between the third and first centuries B.C., and could possibly be one of the work of Archimedes. The gearing technology with the sophistication of the Antikythera mechanism was not seen again for a thousand years.
Like these a vast majority of these works were lost to history and time and our scientific awakening is delayed by millennia. As a tool for introducing scientific measurement, the techniques of Eratosthenes are comparably easy to perform and require no special equipment, allowing to those who are just beginning their interest in science to understand by doing, experimenting and observing ultimately, following in the footsteps of some of the early great scientists.