| 1 | Each pixel is assigned a color and intensity. | |
| 2 | Some witnesses compared the fireball' s brightness to the sun. | |
| 3 | The brightness of a star depends on its surface temperature and size. | |
| 4 | Astronomers describe star brightness in terms of magnitude and luminosity. | |
| 5 | Astronomers can estimate the size and brightness of a star by its color. |
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