Astronomy

Front

What is a light-year?

Back

A light-year is the distance that light travels in one year, used to measure vast distances in space.

Front

What are galaxies?

Back

Galaxies are large groups of stars, gas, dust, and dark matter that are bound together by gravity.

Front

What causes summer on Earth?

Back

Summer occurs when one side of the Earth is tilted towards the Sun, receiving more direct sunlight.

Front

Why do we use light-years instead of miles or kilometers in space?

Back

Because space distances are so huge that using miles or kilometers would result in very large and hard-to-work-with numbers.

Front

What keeps the solar system in motion?

Back

The Sun's gravity keeps all the components of our solar system in motion.

Front

What is the Milky Way?

Back

The Milky Way is the galaxy that contains our solar system, along with billions of other stars.

Front

What are planets?

Back

Planets are large celestial bodies that orbit a star, such as the Sun, and do not produce their own light.

Front

What is the difference between a comet and an asteroid?

Back

Comets are icy bodies that release gas or dust, while asteroids are rocky bodies that do not.

Front

What is the role of gravity in the universe?

Back

Gravity is the force that attracts objects with mass towards each other, keeping planets in orbit around stars.

Front

What is the solar system?

Back

The solar system is a collection of the Sun and all the celestial bodies that are bound to it by gravity, including planets, moons, asteroids, and comets.