The answer is "objects in the universe rotate and revolve at different speeds."

Stars, planets, moons, and other objects in space orbit around each other due to gravity. This type of motion is called revolution. Many objects in space also spin in place. This motion is called rotation.

One Earth rotation is the length of an Earth day and is the reason we experience night and day. One Earth revolution around the sun is the length of a year. Other planets have different lengths of days and years because they rotate and revolve at different speeds.

All planets in our solar system revolve around the sun in the same direction. Most of them (with the exception of uranus and venus) rotate in the same direction as well. About half of the galaxies in the universe rotate clockwise, and the other half rotate counter clockwise. Galaxies are also moving away from each other due to the expansion of the Universe brought on by the Big Bang.

Star - A ball of hydrogen gas held together by gravity. The central core of a star is extremely hot and produces energy. Some of this energy is released as visible light, which makes the star glow
Planet - a celestial body moving in an elliptical orbit around a star
Solar System - a collection of planets and their moons in orbit around a star, together with smaller bodies in the form of asteroids, meteoroids, and comets
Galaxy - a system of millions or billions of stars and the solar systems within them, together with gas and dust, held together by gravitational attraction

The answer is "It indicates that the universe is expanding."

Stars, planets, moons, and other objects in space orbit around each other due to gravity. This type of motion is called revolution. Many objects in space also spin in place. This motion is called rotation.

One Earth rotation is the length of an Earth day and is the reason we experience night and day. One Earth revolution around the sun is the length of a year. Other planets have different lengths of days and years because they rotate and revolve at different speeds.

All planets in our solar system revolve around the sun in the same direction. Most of them (with the exception of uranus and venus) rotate in the same direction as well.About half of the galaxies in the universe rotate clockwise, and the other half rotate counter clockwise. Galaxies are also moving away from each other due to the expansion of the Universe brought on by the Big Bang.

The answer is "The Milky Way." Distances in the universe are so vast that they can be difficult to comprehend. We measure distances in space using light years. A light year is about 6 trillion miles, the distance light travels in one Earth year.

We live on Earth, a planet in a solar system that orbits our sun. Our solar system is only part of a much larger system of many billions of stars called the Milky Way Galaxy. The Milky Way is shaped like a disk with concentrations of brighter stars and clouds of gas shaped like a whirlpool. The Milky Way is only one galaxy of many billions of galaxies in the universe.

In order from smallest to largest, some important terms to remember are: planets and stars, solar systems, galaxies, the universe. Each term is a component of the next. (Aside from planets and stars which are both different components of solar systems.)

The answer is "The Milky Way." Distances in the universe are so vast that they can be difficult to comprehend. We measure distances in space using light years. A light year is about 6 trillion miles, the distance light travels in one Earth year.

We live on Earth, a planet in a solar system that orbits our sun. Our solar system is only part of a much larger system of many billions of stars called the Milky Way Galaxy. The Milky Way is shaped like a disk with concentrations of brighter stars and clouds of gas shaped like a whirlpool. The Milky Way is only one galaxy of many billions of galaxies in the universe.

In order from smallest to largest, some important terms to remember are: planets and stars, solar systems, galaxies, the universe. Each term is a component of the next. (Aside from planets and stars which are both different components of solar systems.)

The answer is "a moon" because moons revolve around planets.

Star - A ball of hydrogen gas held together by gravity. The central core of a star is extremely hot and produces energy. Some of this energy is released as visible light, which makes the star glow.
Planet - a celestial body moving in an elliptical orbit around a star
Solar System - a collection of planets and their moons in orbit around a star, together with smaller bodies in the form of asteroids, meteoroids, and comets.
Galaxy - a system of millions or billions of stars and the solar systems within them, together with gas and dust, held together by gravitational attraction

The answer is "It indicates that the universe is expanding."

Stars, planets, moons, and other objects in space orbit around each other due to gravity. This type of motion is called revolution. Many objects in space also spin in place. This motion is called rotation.

One Earth rotation is the length of an Earth day and is the reason we experience night and day. One Earth revolution around the sun is the length of a year. Other planets have different lengths of days and years because they rotate and revolve at different speeds.

All planets in our solar system revolve around the sun in the same direction. Most of them (with the exception of uranus and venus) rotate in the same direction as well.About half of the galaxies in the universe rotate clockwise, and the other half rotate counter clockwise. Galaxies are also moving away from each other due to the expansion of the Universe brought on by the Big Bang.

The answer is "objects in the universe rotate and revolve at different speeds."

Stars, planets, moons, and other objects in space orbit around each other due to gravity. This type of motion is called revolution. Many objects in space also spin in place. This motion is called rotation.

One Earth rotation is the length of an Earth day and is the reason we experience night and day. One Earth revolution around the sun is the length of a year. Other planets have different lengths of days and years because they rotate and revolve at different speeds.

All planets in our solar system revolve around the sun in the same direction. Most of them (with the exception of uranus and venus) rotate in the same direction as well. About half of the galaxies in the universe rotate clockwise, and the other half rotate counter clockwise. Galaxies are also moving away from each other due to the expansion of the Universe brought on by the Big Bang.

Star - A ball of hydrogen gas held together by gravity. The central core of a star is extremely hot and produces energy. Some of this energy is released as visible light, which makes the star glow
Planet - a celestial body moving in an elliptical orbit around a star
Solar System - a collection of planets and their moons in orbit around a star, together with smaller bodies in the form of asteroids, meteoroids, and comets
Galaxy - a system of millions or billions of stars and the solar systems within them, together with gas and dust, held together by gravitational attraction

The answer is "a moon" because moons revolve around planets.

Star - A ball of hydrogen gas held together by gravity. The central core of a star is extremely hot and produces energy. Some of this energy is released as visible light, which makes the star glow.
Planet - a celestial body moving in an elliptical orbit around a star
Solar System - a collection of planets and their moons in orbit around a star, together with smaller bodies in the form of asteroids, meteoroids, and comets.
Galaxy - a system of millions or billions of stars and the solar systems within them, together with gas and dust, held together by gravitational attraction