The magnitude of three stars is indicated. Which star is the brightest?

Correct Answer: Option A — Vega + 0.1

In the astronomical magnitude scale, lower numerical values represent brighter objects. A magnitude of +0.1 is significantly brighter than +0.9 or +1.2. This logarithmic scale is standard in the Nautical Almanac, where smaller numbers indicate higher intensity of light reaching the observer from the celestial body.