Question

gravity keeps celestial objects in orbit, holds massive structures together, and drives the formation of all celestial objects throughout the universe. determine whether each statement is true or false. a moon will stay in orbit around a planet as long as its forward motion is balanced by the planets gravitational pull. planets form within protoplanetary disks containing gas and dust left over from the formation of new stars. both stars and planets form due to increasing gravitational forces pulling in more matter from the surroundings. the gravitational force between a star and a closely orbiting massive planet is weaker than the gravitational force between the star and a small planet orbiting it farther away.

Explanation:

1. A moon's orbital stability relies on the balance between its forward (tangential) motion and the planet's gravitational pull, which acts as centripetal force.
2. Planets form in protoplanetary disks—clouds of gas and dust leftover from star formation—where material clumps together over time.
3. Both stars and planets form when gravitational attraction pulls surrounding gas and dust inward, causing the material to accumulate and compact.
4. Gravitational force depends on mass and distance ($F=G\frac{m_1m_2}{r^2}$). A massive planet close to a star will exert a stronger gravitational force than a small planet far away, since mass has a direct relationship and distance has an inverse squared relationship to force.

Answer:

1. A moon will stay in orbit around a planet as long as its forward motion is balanced by the planet's gravitational pull.: True
2. Planets form within protoplanetary disks containing gas and dust left over from the formation of new stars.: True
3. Both stars and planets form due to increasing gravitational forces pulling in more matter from the surroundings.: True
4. The gravitational force between a star and a closely orbiting massive planet is weaker than the gravitational force between the star and a small planet orbiting it farther away.: False