adrianositizano: Richard Feynman on Quantum Mechanics Part 2 QED Fits of Reflection and Transmission Quantum Beha

adrianositizano: Richard Feynman on Quantum Mechanics Part 3 Electrons and their Interactions

🌜The Moon🌛
✨The Moon is 384, 400 km from the Earth and More than 25% of Earth's diameter.
✨Once every month, the Moon orbits the Earth. Each orbit takes 27.3 days. It spins around once on its axis in exactly the same time, so only one side of the Moon's surface can be seen.
✨The moon is the brightest object in the night sky, but it does not give out any light itself. It shines only because it surface reflects sunlight.
✨One half of the Moon is always lit by the sun, but as it travels round the Earth, different amount of sunlit side can be seen. This is why the Moons seems to charge shape. These are called the phases of the Moon.
✨A lunar month is the time between one Full Moon and the next. This is slightly longer than the time the moon takes to orbit the Earth because the Earth is also moving.
✨The Moon has no atmosphere and its surface is simply dust, pitted with craters created by meteorites smashing into it early in its history.
✨On the Moon's surface are large, dark patches called seas because that is what people once people once believed they were. They are actually lava flows from ancient volcanoes.
✨One side of the moon is always turned away from the Earth and is called its far side. This is because the moon spins round on its axis at exactly the same time that it orbit the Earth.
✨Unlike the Earth's surface, which changes by the hour, the Moon's dusty, crater pitted surface has remained much the same for billions of years. The only change happens when the meteorite smashes into it and creates a new crater.
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National Geographic: Moon 101 | National Geographic

Mike Sammartano: An Introduction to Earth's Moon

CrashCourse: The Moon: Crash Course Astronomy #12

The universe🚀
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🌘Eclipse🌒
✨When one space object, such as the Moon, blocks out the light from another, such as the Sun, an eclipse occurs.
✨A lunar eclipse is when the Moon travels behinds the Earth, and into the Earth's(Earth is between the Moon and the Sun).
✨Lunar eclipses happen about once or twice a year and lasts only a few hours.
In a total lunar eclipse, the Moon turns rust-red.
✨Lunar eclipse can be seen from anywhere on the half of the Earth facing the Moon.
✨A Solar eclipse is when the Moon comes between the Sun and the Earth, casting a shadow up to 270 km wide onto the Earth's surface.
✨In a total eclipse of the Sun, the Moon passes directly in front of the Sun, completely covering it so that only its corona can be seen.
✨There are at least two solar eclipses every year, but they are only visible from a narrow strip of the world.
✨Totality is when the Moon blocks out the face of the Sun completely. It only lasts for a few minutes.
✨Solar eclipse are possible because the Moon is 400 times smaller than the Sun, and is also 400 times closer to the Earth.This means the Sun and the Moon appear to be the same size in the sky.
✨During a total Solar eclipse of the sun, the moon blocks everything except the sun's corona.
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Space Videos: What is an eclipse? Lunar and Solar eclipses explained

Jared Owen: Solar Eclipse and Lunar Eclipse

National Geographic: Solar Eclipse 101 | National Geographic

Science Strangeries
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A Brief History of Time
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Narrated by: Michael Jackson
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🌔Mars🌖
✨The nearest planet to Earth after Venus is Mars. It has a daytime temperature and atmosphere more like the Earth's than any other planet.
✨Mars is called the red planet because it is rust in colour. This comes from oxidized(rusted) iron in its soil.
✨The fourth planet out from the sun, Mars orbits at an average distance of 227.9 million km. It takes 687 Earth days to complete its orbit.
✨Mars is 6794 km in diameter and spins around once every 24.62 hours- almost the same as the Earth takes to rotate.
✨Olympus Mons, Mars's Volcano, is the biggest in the solar system. It covers the same area as the UK and is three times higher than Mount Everest.
✨The surface of Mars is dry, rocky and covered in dust. The wind blows up huge dust storms, sometimes covering the whole planet. Dust devils, similar to small tornadoes, often race across the surface of Mars.
✨Almost all the water on Mars is frozen in to ice. There are ice caps at the poles, and thinn cloud made of ice crystals in the sky. Orbiting spacecraft have found ice hidden beneath the surface.
✨Mars was probably warmer and wetter in the past. Spacecraft have spotted many dried-up riverbeds, gullies and lake beds, and the Mars Rovers, Spirit and Opportunity have found minerals that normally form in water.
✨The Mars Global surveyor spacecraft has discovered two gullies on Mars where water or mud may have gushed out on to the surface in the last few years.
✨In 2008, NASA's Phoenix lander confirmed the presence of water in the form of ice crystals just below the surface. The ice was found in a soil sample scooped from a 5cm deep trench nicknamed snow White.
✨Mars is the best known planet besides Earth. Studies have revealed a planet with a surface like a red, rocky desert- but there is also plenty of evidence that Mars wasn't always so desert like.
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Tom Pickett's Astrophotography: Mars - The Red Planet