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Gravity and Space

Gravity and Space. Gravity. Note that this force goes both ways – the Earth is attracted to us. Gravity is an attractive force that affects anything with mass:. Gravity. If you double the mass of one object you double the force. F. F.

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Gravity and Space

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  1. Gravity and Space

  2. Gravity Note that this force goes both ways – the Earth is attracted to us. Gravity is an attractive force that affects anything with mass:

  3. Gravity If you double the mass of one object you double the force F F If you double the distance the gravitational force decreases F F Gravity depends on 2 things: 1) The mass of the objects 2) The distance between them

  4. Gravity and our Solar System • The Sun’s gravity is what holds our solar system together. • Since Jupiter is the largest planet, it has the most gravity. • Pluto has the least amount of gravity of all the planets

  5. 04/01/2020 Gravity and our Solar System • What do you think would happen to the planets if the sun’s gravitational pull suddenly disappeared? To get an explanation WATCH THIS! • GRAVITY – it’s what holds our Solar System together!

  6. Now let’s learn about… An overview of the Solar System

  7. The Sun • The sun is the biggest, brightest, and hottest object in the solar system. • The sun is an ordinary star. • The sun is made of about 70% hydrogen and 28% helium.

  8. Mercury • Mercury is solid, rocky, and is covered with craters. • Mercury has almost no atmosphere. • There are no moons on mercury • Mercury is the smallest of our eight.

  9. Venus • Venus is the sixth largest planet. It’s slightly smaller than Earth. • The surface is rocky and very hot. The atmosphere completely hides the surface and traps the heat. • Venus has no moons.

  10. Earth • Earth is the fifth largest planet and the third from the sun. • It is a rocky planet covered mostly by water. • The Earth has one moon.

  11. Moon

  12. Mars • Mars is the fourth planet from the sun. • Mars is rocky • Mars has a thin atmosphere of mostly carbon dioxide. • Mars has two small moons.

  13. Moons of Mars Phobos Deimos

  14. Jupiter • The Great Red Spot, a huge storm of swirling gas that has lasted for hundreds of years. • Jupiter does not have a solid surface. The planet is a ball of liquid surrounded by gas. • Jupiter has over 65 moons!

  15. Io

  16. Europa

  17. Ganymede

  18. Callisto

  19. Saturn • Saturn is the second largest planet and the sixth from the sun. • Saturn is made of materials that are lighter than water. If you could fit Saturn in a lake, it would float! • Saturn has 62 moons.

  20. Rings of Saturn • Saturn’s rings are not solid; they are composed of small particles of ice and rock.

  21. Uranus • Uranus is the third largest planet and the seventh from the sun. • Uranus is one of the giant gas planets. • Uranus is blue-green because of the methane in its atmosphere.

  22. Neptune • Neptune is the fourth largest planet and the eight from the sun. • Like Uranus, the methane gas gives Neptune its color. • Neptune has 13 known moons

  23. How Did We Learn All This?Now, let’s look at a few of history’s greatest contributions to space exploration and learn about the different crafts used.

  24. Galileo Galilei

  25. Robert Goddard Robert H. Goddard is know as the American father of modern rocketry He built and tested the world's first liquid-fuel rocket in 1926. Over the course of his career, Goddard not only developed the calculations for rocket flight and also made advances in rocket design and construction.

  26. What is a rocket?Rockets are space craft with chemical propellants used to escape the earths gravity.

  27. Sputnik 1The first manmade satellite to orbit the earth – Soviet Union.

  28. Explorer 1The first U.S. satellite to orbit the Earth.

  29. What is a satellite?An object that orbits another object. They can be natural , like a moon orbiting a planet, or artificial, like Explorer 1.

  30. Natural Satellites These planets are all satellites of the sun Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Pluto

  31. Artificial Satellites Artificial satellites have been around for 50 years and have 3 main uses: 1) Observation (e.g. Hubble Space Telescope) – these are in orbit high above the Earth and can observe the universe without interference 2) Communications – radio, phone, navigation 3) Monitoring – weather and spying

  32. Voyager 1 and 2These were probes discovered many things including the rings and moons of the far away gas giant. It is the farthest man mad object in space.

  33. What is a probe?A space probe is a robotic spacecraft that leaves Earth orbit and explores space.

  34. NASAStrands for National Aeronautics and Space Administration. It is our governmental agency devoted to exploring space.

  35. Apollo MissionsThese missions were to land a man on the moon and return him safely. "That's one small step for a man. One giant leap for mankind."- Neil Armstrong

  36. The Space ShuttleThis program created the first reusable space craft that could carry people and cargo to and from space.

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