Discussion Overview
The discussion revolves around how Greek astronomers might have determined the difference in brightness between stars of different magnitudes using telescopes, despite the historical inaccuracy of their use of telescopes. Participants explore the origins of the magnitude system and its implications for brightness measurement.
Discussion Character
- Debate/contested
- Historical
- Conceptual clarification
Main Points Raised
- One participant suggests using different size telescopes to equalize the brightness of stars in the eyepiece, questioning if this approach is valid.
- Another participant challenges this idea by stating that Greek astronomers did not have telescopes and that the magnitude system was established in the late 1800s.
- A later reply clarifies that while Greek astronomers devised the magnitude system, it was astronomer Herschel who determined the brightness difference between stars of magnitudes 1 and 6 using telescopes.
- It is noted that the magnitude system was based on apparent brightness determined by the human eye, which has a logarithmic response, leading to a logarithmic brightness system.
- One participant encourages specificity regarding the term "size" of the telescopes in relation to the initial suggestion.
Areas of Agreement / Disagreement
Participants express disagreement regarding the historical use of telescopes by Greek astronomers and the timeline of the magnitude system's establishment. There is no consensus on the validity of the initial suggestion regarding telescope use.
Contextual Notes
The discussion highlights limitations in historical accuracy regarding the use of telescopes and the development of the magnitude system, as well as the assumptions about the capabilities of Greek astronomers.