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Gravity is a force of attraction that exists between any two masses, any two bodies, any two particles. Gravity is not just the attraction between objects and the Earth. It is an attraction that exists between all objects, everywhere in the universe. Sir Isaac Newton (1642 -- 1727) discovered that a force is required to change the speed or ...
Smaller, lighter objects, such as tennis balls. 3. Activity: Explain that the sheet represents spacetime, the large object represents the Sun and the smaller object represents a planet. Have the students pull the edges of the sheet outward. Make sure the sheet is taut. Roll the lighter balls across the sheet. Note how they travel in a straight ...
Stars evolve, or change, over time. It may take millions of years or it may take billions of years for a star to complete its life cycle. A star is a brilliantly glowing sphere of hot gas whose energy is produced by an internal nuclear fusion process. Stars are contained in galaxies. A galaxy contains not only stars, but clouds of gas and dust.
GRAVITY The invisible force between objects that makes objects attract each other. GRAVITATIONAL PULL The attraction that one object has for another object due to the invisible force of gravity. H HURRICANE A very, very strong windstorm where the wind blows in circles at more than 46 kilometers per hour. Heavy rains often come with the winds. I J K
25 de ago. de 2023 · Fighting for liberty raising the energy. Bursting at the seams. Freedom looking down a telescope. Starlight never been so beautiful. Whole world waiting for us time to go. Escaping gravity. We'll be rising high above the rain. Sunset never gonna be the same. Thunder calling us to outer space.
The Capture Theory: This theory proposes that the Moon was formed somewhere else in the solar system, and was later captured by the gravitational fieldof the Earth. The Moon's different chemical composition could be explained if it formed elsewhere in the solar system, however, capture into the Moon's present orbitis very improbable.
What makes the Sun shine? Answer: The simple answer is that deep inside the core of the Sun, enough protons can collide into each other with enough speed that they stick together to form a helium nucleus and generate a tremendous amount of energy at the same time. This process is called nuclear fusion.
Galileo designed a variety of scientific instruments. Among them was the hydrostatic balance. This was an instrument used to find the specific gravity of objects by weighing them in water. Go to Imagine the Universe! (A site for ages 14 and up.) The StarChild site is a service of the High Energy Astrophysics Science Archive Research Center ...
It is 9.5 trillion (9,500,000,000,000) kilometers. The size of a galaxy may be as little as a thousand light-years across or as much as a million light-years across. A galaxy contains stars, gas, and dust which are held together as a group by gravity. There may be millions, or even billions, of stars in one galaxy.
Galaxies range from a few thousand to a million light-years in diameter. A galaxy is a cluster of stars, dust, and gas which is held together by gravity. Galaxies are scattered throughout the universe and they vary greatly in size. A galaxy may be alone or it may be in a large group of galaxies called a "supercluster".
