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How to use parallax and Cepheids together to measure distances?
I can't quite grasp the simple version of how the Cepheid method uses the parallax method to measure the distance to distant galaxies.
What I know is that Cepheids exhibit a period vs luminosity ...
- 193
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Describe a path that a star moves around the sky [closed]
Suppose a star in the ecliptic plane has a parallax of p = 0.5 arcsec and a proper
motion perpendicular to the ecliptic plane of µ = 1.0 arcsec/year.
I need to describe the path that the star ...
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