STAAR Science

Front

What is the electromagnetic spectrum?

Back

The electromagnetic spectrum is the range of all types of electromagnetic radiation, which includes gamma rays, X-rays, ultraviolet light, visible light, infrared light, microwaves, and radio waves.

Front

Why do gamma-ray telescopes need to be placed in orbit?

Back

Gamma-ray telescopes must be placed in orbit because Earth's atmosphere blocks short wavelengths of the electromagnetic spectrum, including gamma rays.

Front

What is the Hertzsprung-Russell diagram used for?

Back

The Hertzsprung-Russell diagram is a tool used to classify stars based on their brightness and surface temperature.

Front

How are galaxies classified?

Back

Galaxies are classified based on their shape, which can be spiral, elliptical, or irregular.

Front

What force keeps planets in orbit around the sun?

Back

Gravity is the force that keeps planets in the solar system from moving in straight lines through the galaxy.

Front

What is the difference between visible light and gamma rays?

Back

Visible light is the portion of the electromagnetic spectrum that can be seen by the human eye, while gamma rays are high-energy radiation with much shorter wavelengths.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion; it is not the force that keeps planets in orbit.

Front

What is the role of gravity in the universe?

Back

Gravity is the force that attracts two bodies toward each other, governing the motion of planets, stars, galaxies, and even light.

Front

What is the significance of the distance of stars from Earth?

Back

The distance of stars from Earth affects their apparent brightness; stars that are closer appear brighter than those that are farther away.

Front

What are the main types of galaxies?

Back

The main types of galaxies are spiral galaxies, elliptical galaxies, and irregular galaxies.