Exploring the Stars: A Cosmic Journey

What is the primary process that allows stars to glow?

• Photosynthesis

• Nuclear fusion

• Chemical reaction

• Solar flares

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

• Nitrogen and Oxygen

• Carbon and Hydrogen

• Oxygen and Carbon

• Hydrogen and Helium

How is nuclear fusion related to a star's glow?

• It cools the star down

• It creates darkness

• It generates energy that produces light

• It absorbs light from other stars

What happens during nuclear fusion inside a star?

• Oxygen splits into carbon

• Carbon fuses into nitrogen

• Hydrogen atoms combine to form helium

• Helium turns into hydrogen

What does a star's luminosity measure?

• Its size

• Its temperature

• Its distance from Earth

• The amount of light it emits

Why do some stars appear brighter than others from Earth?

• Their size

• Their color

• Their distance from Earth

• Their temperature

What factor does not affect a star's apparent brightness?

• Its age

• Its size

• Its distance from Earth

• Its true brightness

What is true brightness also known as?

• Apparent brightness

• Luminosity

• Magnitude

• Radiance

Which star is larger, Betelgeuse or the Sun?

• Betelgeuse

• The Sun

• They are the same size

• It cannot be determined

Why does the Sun appear so bright to us?

• Because it's the only star in our solar system

• Because it's the largest star

• Because it's very close to Earth

• Because it has the highest luminosity