What is the answer?

Stars are often classified by their apparent brightness in the nighttime sky. Stars can also be classified in many other ways. Which of these is least useful in classifying stars?

OPTIONS:
- visible color
- composition
- surface texture
- temperature
surface texture
Vad är svaret? Stjärnor klassificeras ofta efter sin skenbara ljusstyrka på natthimlen. Stjärnor kan också klassificeras på många andra sätt. Vilken av dessa är minst användbar för att klassificera stjärnor? ALTERNATIV: - synlig färg - sammansättning - ytstruktur - temperatur
What's the answer? Stars are often classified according to their apparent brightness in the night sky. Stars can also be classified in many other ways. Which of these is the least useful for classifying stars? ALTERNATIVE: - visible colour - composition - surface structure - temperature
ytstruktur
surface structure