Unit 6 Vocab

Front

What is the total amount of light (energy) emitted by a star or other celestial body called?

Back

Luminosity

Front

What do we call a luminous globe of gas that produces its own heat and light?

Back

Star

Front

What are clouds of dust and gas, which are sites of star formation, known as?

Back

Nebulae

Front

What is a system of stars and associated matter, held together by gravitational attraction, called?

Back

Galaxy

Front

What term describes the different colors of light emitted based on the chemical composition of the light source?

Back

Spectra

Front

What is the process by which stars form from nebulae?

Back

Star formation

Front

What is the main difference between a star and a planet?

Back

A star produces its own light and heat, while a planet does not.

Front

What is the significance of luminosity in understanding a star's life cycle?

Back

Luminosity helps determine a star's size, temperature, and stage in its life cycle.

Front

What role do nebulae play in the universe?

Back

Nebulae are the birthplaces of stars and can also be remnants of dead or dying stars.

Front

How do galaxies differ from nebulae?

Back

Galaxies are vast systems containing billions of stars, while nebulae are smaller clouds of gas and dust.