Unit 6 Vocab

Front

What is the measure of how bright a star appears as seen from Earth?

Back

Apparent magnitude

Front

What is the term for the measure of the brightness of a star?

Back

Magnitude

Front

What do we call the total amount of light (energy) emitted by a star or other celestial body?

Back

Luminosity

Front

What is the name of the diagram that shows the relationship between the brightness, surface temperature, and color of stars?

Back

HR Diagram

Front

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

Back

Galaxy

Front

What is the difference between apparent magnitude and absolute magnitude?

Back

Apparent magnitude is how bright a star appears from Earth, while absolute magnitude is how bright a star would appear at a standard distance of 10 parsecs.

Front

What is the significance of the HR Diagram in astronomy?

Back

The HR Diagram helps astronomers classify stars and understand their evolution based on their brightness and temperature.

Front

What factors can affect the apparent magnitude of a star?

Back

Distance from Earth, intrinsic brightness (luminosity), and interstellar dust can all affect a star's apparent magnitude.

Front

How is luminosity related to a star's temperature and size?

Back

Luminosity increases with temperature and size; hotter and larger stars emit more energy.

Front

What is the role of gravity in the formation of a galaxy?

Back

Gravity pulls together gas, dust, and stars to form galaxies, holding them together.