| Answer | Crossword Clue |
|---|---|
| parallaxes | PARALLAX, an apparent optical displacement of an object |
| parallax | an apparent optical displacement of an object |
| parallax | the apparent displacement of an observed object due to a change in the position of the observer. |
| magnitudes | The degree of brightness of a star. The magnitude of an astronomical object is now reckoned as the negative logarithm of the brightness; a decrease of one magnitude represents an increase in brightness of 2.512 times. A star with an apparent magnitude of six is barely visible to the naked eye |
