MOD Stars/HR Diagrams/Measuring the Sky

Front

What is the angle measure upward from the horizon?

Back

Altitude

Front

What is a binary star system?

Back

A star system with two stars.

Front

What characteristics are plotted on H-R diagrams?

Back

Luminosity versus surface temperature.

Front

Which characteristic CANNOT be determined using an H-R diagram?

Back

Distance from Earth.

Front

What causes stars to perform nuclear fusion?

Back

Extreme gravitational force.

Front

What is the H-R diagram used for?

Back

To classify stars based on their luminosity and temperature.

Front

Define luminosity in the context of stars.

Back

The total amount of energy emitted by a star per unit time.

Front

What is the significance of surface temperature in stars?

Back

It affects the color and spectral classification of the star.

Front

What is the main sequence in the H-R diagram?

Back

A continuous band where most stars, including the Sun, are found, indicating a stable phase of hydrogen burning.

Front

What are red giants?

Back

Stars that have expanded and cooled, found above the main sequence on the H-R diagram.