The blue giant star in Orion is called Bellatrix, and its distance is 243 ly. What is the distance in parsecs?

To convert light years to parsecs, you can use the conversion factor that 1 parsec is equal to approximately 3.26 light years.

So, to convert the distance of Bellatrix from light years to parsecs:

243 ly × (1 pc / 3.26 ly) ≈ 74.54 pc

Therefore, the distance of Bellatrix in parsecs is approximately 74.54 parsecs.