STARS

Front

What does a star's magnitude scale indicate?

Back

The magnitude scale indicates the brightness of a star; lower numbers mean brighter stars.

Front

If a star has a magnitude of 6, how does it compare to a star with a magnitude of 1?

Back

A star with magnitude 6 is fainter than a star with magnitude 1.

Front

What color indicates a hotter star?

Back

Blue stars are hotter than red stars.

Front

Where are blue giants located on the Hertzsprung-Russell (H-R) diagram?

Back

Blue giants are found in the upper left section of the H-R diagram.

Front

What happens to the apparent brightness of a light source if the distance is tripled?

Back

The apparent brightness decreases by a factor of 9.

Front

What is the hottest spectral classification of stars?

Back

The hottest spectral classification is O.

Front

What is the relationship between a star's color and its temperature?

Back

A star's color indicates its temperature; blue stars are hotter, while red stars are cooler.

Front

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

Back

The main sequence is a diagonal band where most stars, including our Sun, are found, representing a stable phase of stellar evolution.

Front

How does the distance to a star affect its brightness as observed from Earth?

Back

As the distance to a star increases, its brightness decreases.

Front

What is the significance of the H-R diagram in astronomy?

Back

The H-R diagram classifies stars based on their luminosity and temperature, helping to understand stellar evolution.