Stars and Constellations in Our Galaxy

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Do all stars appear in different positions at different times of the year?

Slide 13

Constellations

What is changing at the same (annual) timescale that we are observing the changing zodiac?

Do the constellations appear to change positions in the night sky as Earth travels around our Sun throughout the year?

Are the constellations themselves moving?

What causes this apparent change in positions?

Do all stars appear in different positions at different times of the year? All except Polaris

Why is Polaris the only star that appears “fixed”?

Slide 14

Constellations

What is changing at the same (annual) timescale that we are observing the changing zodiac?

Do the constellations appear to change positions in the night sky as Earth travels around our Sun throughout the year?

Are the constellations themselves moving?

What causes this apparent change in positions?

Do all stars appear in different positions at different times of the year?

Why is Polaris the only star that appears “fixed”? Earth’s axis points to Polaris

Slide 15