## More about parallax

### More About Parallax

Astronomers can measure parallax by measuring the position of a nearby star very carefully with respect to more distant stars behind it, then measuring those distances again six months later when the Earth is on the opposite side of its orbit. The shift is tiny... less than an arcsecond even for the nearest star (an arcsecond is 1/60 of an arcminute, which is 1/60 of a degree).Tell me more about finding distances to stars |

Tell me how to derive the parallax formula. |

Click here to return to finding the distance to HT Cas using parallax. |