Star Brightness

The brightness of a star as seen from earth

• Apparent magnitude

• Awesome magnitude

• Absolute magnitude

• Amazing magnitude

Brightness determined from 10 parsecs away is called the

• Amazing magnitude

• Absolute magnitude

• Apparent magnitude

• Awesome magnitude

Why can the apparent magnitude be inaccurate?

• It's only from 10 parsecs away

• It may not be brighter compared to another star but instead just closer

• It only shows the brightness of stars too far away for humans to detect

• the scale is upside down

In comparison to other stars in the sky, the Sun appears brighter because it is–

• Bigger

• Smaller

• Nearer

• Further

Alpha Centauri A is a star that is larger than the Sun, yet it appears much less bright. Which of the following is the best explanation for this?

• The difference in brightness is due to the distance of the Sun and Alpha Centauri A from Earth

• The smaller a star the brighter it appears

• The older the star the brighter it appears

• The larger the star always appears to be brighter

The absolute brightness of a star depends on its

• distance and temperature.
• size and temperature.
• color and temperature.
• distance and color.

The brightness of a star as seen from Earth is its

• apparent magnitude

• absolute brightness.

• parallax.

• reflective brightness.

What color of star is the hottest?

• Blue
• Red
• Yellow
• Orange

The color of a star depends on its

• size
• temperature
• shape
• magnitude

A very bright star can seem to be dimmer because it is 

• further away
• cooler in temperature
• very close
• batteries are dying