How do light-years help astronomers to determine the ages of distant objects in space?

Which of the following best describes the difference between two different units of distance in space?

Which of the following models is most similar to the celestial sphere?

Your friend argues that all the stars in a typical constellation are approximately the same distance from Earth. Is your friend correct?

At the eye doctor, you place a paddle over your left eye to read the eye chart. When you repeat the process with the right eye, you notice that the coat hanger in your peripheral vision has shifted. Explain what has happened in terms of parallax.

What is parallax?

How are objects located on the celestial sphere?

An astronomical unit is equivalent to

A star is located approximately 500 million light-years from Earth. Can a student determine the star's distance by calculating its parallax angle?

A light-year is a measure of

What is the distance of an object from Earth if the object is 7 AU from the sun? (Assume that both Earth and the object are located in the same direction from the sun.)

What is a constellation?

How do scientists define an astronomical unit?

What is necessary to calculate a star's distance from Earth?

Approximately how many astronomical units are equivalent to one light-year?

Vega, the brightest star in the constellation Lyra, has a parallax angle of approximately 0.13 arcseconds when viewed at 2 different times six months apart. Approximately how far away is Vega from the Sun?

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