Who built what was at the time the world’s largest observatory.

• Johannes Kepler

• Nicolaus Copernicus

• Tycho Brahe

The protostellar disk formed after the collapse of the solar nebula. What does the word "proto" mean?

• first

• middle

• last

A/An ____ is the path that a body follows as it travels around another body in space.

• galaxy

• orbit

• pathway

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

There is one point where the object is farthest from the sun. We call it ____

• perihelion

• aphelion

• supahelion

Tags

NGSS.MS-ESS1-2

At which point does a planet move most slowly in its orbit, at aphelion or perihelion?

• aphelion

• perihelion

Tags

NGSS.MS-ESS1-2

Is a force of attraction between objects that is due to their masses and the distances between them.

• attraction

• Orbit

• Gravity

Tags

NGSS.MS-PS2-4

The inward force that causes an object to move in a circular path is called _____.

• gravity

• centripetal force

• motion

The point where the object is closest to the sun.

• perihelion

• supahelion

• aphelion

Who formulated the law of universal gravitation?

• Sir Isaac Newton

• Johannes Kepler

• Galileo Galili

Tags

NGSS.HS-PS2-4

Planets that formed in the outer disk have rocky or metallic cores and deep atmospheres of gas and ice are called _______

• planetary objects

• gas giant planets

• terrestrial planets