Apparent and Absolute Brightness

Why can the apparent magnitude be inaccurate?

• It doesn't exist

• 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 messed up

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

• further away

• cooler in temperature

• very close

• batteries are dying

What is magnitude?

• the process inside a star that produces the star's energy

• term used by scientists to describe a star's brightness

• star groupings in space

• the process inside a star that produces the star's energy

Which of the following stars would be seen as the brightest star?

• Alpheratz, which has an apparent magnitude of 2

• Alcyone, which has an apparent magnitude of 3

• Deneb, which has an apparent magnitude of 1

• Sirius, which has an apparent magnitude of -1

Which star appears the least bright from Earth?

• B

• A

• C

• D

Which star is the brightest based on APPARENT magnitude?

• Sun

• Sirius

• Vega

• Polaris

Brightness determined by DISTANCE from the earth

• Amazing magnitude

• Absolute magnitude

• Apparent magnitude

• Awesome magnitude

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

• Bigger

• Smaller

• Nearer

• Further

Tags

NGSS.MS-ESS1-1

Which star is the brightest?

• Sirius

• Alderban

• Rigel

• Sun

What is the difference between apparent brightness and absolute brightness?

• Apparent brightness is how bright a star appears from Earth, while absolute brightness is how bright it actually is at a standard distance.

• Apparent brightness is the actual brightness of a star, while absolute brightness is how bright it appears from Earth.

• Apparent brightness is measured in watts, while absolute brightness is measured in lumens.

• Apparent brightness is only applicable to stars within our galaxy, while absolute brightness applies to all stars.