Exploring the Stars: A Cosmic Journey

What are the two main gases that make up most stars?

• Nitrogen and Helium

• Hydrogen and Oxygen

• Oxygen and Carbon

• Hydrogen and Helium

What process allows stars to produce energy and glow?

• Nuclear fusion

• Solar power

• Chemical reaction

• Photosynthesis

What is the term used to describe a star's true brightness?

• Radiance

• Luminosity

• Magnitude

• Intensity

Why does Betelgeuse appear less bright than the Sun, despite being more luminous?

• It's smaller than the Sun

• It's much farther from Earth

• It's a different color

• It's cooler than the Sun

What influences a star's brightness as seen from Earth?

• Its size and age

• Its distance and power

• Its color and temperature

• Its motion and direction