Understanding Stars and the Universe

Front

What is gravitation's role in stars?

Back

It facilitates the conversion of mass into energy.

Front

How can the composition of a star be determined?

Back

By the color of light it radiates.

Front

What is the relationship between mass and energy in the universe?

Back

All mass was once energy.

Front

What happens to the energy released in nuclear fusion in stars?

Back

It increases the thermal energy of the star's atoms.

Front

How does redshift of light from distant galaxies support the Big Bang theory?

Back

It suggests galaxies are moving away.

Front

What is nuclear fusion?

Back

A process where two light atomic nuclei combine to form a heavier nucleus, releasing energy.

Front

What is a star's life cycle?

Back

The sequence of stages a star goes through from formation to death, including main sequence, red giant, and supernova.

Front

What is a black hole?

Back

A region in space where the gravitational pull is so strong that nothing, not even light, can escape.

Front

What is the significance of the Hertzsprung-Russell diagram?

Back

It classifies stars based on their luminosity and temperature, showing the relationship between them.

Front

What is the Big Bang theory?

Back

A scientific explanation for the origin of the universe, stating it began from a singular point and has been expanding ever since.