A telescope on Earth is taking measurements of a nearby star six months apart. The telescope is limited in resolution to 0.001ʺ. How far away is the farthest star the telescope can have a parallax measurement with? Give your answer in: Astronomical Units (AU): Kilometers (km): Parsecs (pc):

Q: Use a diagram to explain what is meant by the parallax angle, p, for a star observed twice from…

A: Diagram for explaining parallax angle:        o   star                                      / \…

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Q: Why are Earth-based parallax measurements limited to the nearest stars?

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Q: Hertzsprung-Russell Diagram

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