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11 paź 2024 · Gravity is what holds the planets in orbit around the sun and what keeps the moon in orbit around Earth. The gravitational pull of the moon pulls the seas towards it, causing the ocean tides. Gravity creates stars and planets by pulling together the material from which they are made.
It is gravity that holds the Moon in orbit around the Earth, and gravity that enables the Sun to hold onto its family of planets. The pull of the Sun and Moon also causes Earth’s ocean tides. However, the strength of gravity depends on the size and density of an object – what scientists call its “mass”.
Gravity is a pulling force that works across space. That is, objects do not have to touch each other for the force of gravity to affect them. For example, the Sun, which is millions of miles from Earth, pulls on Earth and the other planets and objects in the solar system.
Gravity not only keeps planets and moons in their orbits but also holds them together. It also played a dominant part in their formation. The Sun, for example, produces the heat and light needed for life on Earth through nuclear reactions deep in its interior.
Have you ever seen a fruit or object falling from a tree? And have you ever tried to throw a stone and watch it fall? This force that ‘brings down’ things is called the force of gravity.
The force that pulls things to the centre of Earth (and other planets) is called gravity. Gravity also holds Earth and the other planets in their orbits around the Sun.
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