Stellar Parallax and Distance Measurement

The video explains how astronomers determine the distance to stars using stellar parallax, a method based on geometry and the Earth's orbit around the Sun. For stars within 400 light years, this method is effective. For more distant stars, astronomers use brightness and color spectrum to estimate distances.

What is the primary method used to determine the distance to nearby stars?

• Using a telescope

• Observing star color

• Stellar parallax

• Measuring star temperature

What is the term for the apparent shift in position of nearby stars against distant stars?

• Stellar parallax

• Stellar motion

• Stellar brightness

• Stellar spectrum

In the hand-eye demonstration, what forms the base of the triangle?

• The length of your arm

• The distance between your eyes

• The angle of your hand

• The distance to the background

How do astronomers use the parallax method to measure star distances?

• By measuring the star's brightness

• By observing the star's color

• By calculating the angle of apparent movement

• By using a telescope

Why do distant stars appear fixed in the sky?

• They are too far to show noticeable parallax

• They are not moving

• They are brighter

• They are larger

What is the maximum distance for which the parallax method is effective?

• 100 light years

• 200 light years

• 400 light years

• 600 light years

What alternative method is used for measuring distances to stars beyond 400 light years?

• Observing star temperature

• Using a telescope

• Brightness measurements

• Stellar parallax

What does the color spectrum of a star indicate?

• The star's actual brightness

• The star's size

• The star's temperature

• The star's distance

How do astronomers determine the distance to a star using brightness?

• By comparing actual and apparent brightness

• By measuring the star's temperature

• By observing the star's color

• By using a telescope