Question

Почему планеты не улетают от звёзд

Answer 1

Потому что их удерживает гравитационное поле

Answer 2

Why don't planets fly away from stars?

Planets do not fly away from stars because they are held in orbit by the gravitational force between the planet and the star. The gravitational force is the attractive force between two objects with mass. In the case of planets and stars, the star's mass is much larger than the planet's mass, so the star exerts a strong gravitational force on the planet, keeping it in orbit.

Gravity is a fundamental force of nature that acts over long distances. It is responsible for keeping celestial bodies, such as planets, moons, and asteroids, in orbit around larger objects like stars. The force of gravity pulls the planet towards the star, while the planet's forward motion keeps it from falling directly into the star. This delicate balance between gravity and the planet's motion results in a stable orbit.

Gravitational force and orbital motion

The gravitational force between two objects depends on their masses and the distance between them. According to Newton's law of universal gravitation, the force of gravity is directly proportional to the product of the masses of the two objects and inversely proportional to the square of the distance between them.

In the case of planets and stars, the star's mass is much larger than the planet's mass, so the gravitational force exerted by the star is significantly stronger. This gravitational force pulls the planet towards the star, causing it to move in a curved path around the star. This curved path is known as an orbit.

The planet's orbital motion is a result of its initial velocity and the gravitational force acting upon it. The planet's velocity is perpendicular to the gravitational force, which allows it to continuously fall towards the star while also moving forward. This combination of falling towards the star and moving forward results in a circular or elliptical orbit.

Conclusion

In summary, planets do not fly away from stars because they are held in orbit by the gravitational force between the planet and the star. The gravitational force pulls the planet towards the star, while the planet's forward motion keeps it from falling directly into the star. This delicate balance between gravity and the planet's motion allows planets to remain in stable orbits around stars.