Question
Which of the following represents the brightness of a celestial object measured from Earth?
Absolute brightness
Apparent magnitude
Luminosity
Proto-star
Answers
Answered by
GPT-4o mini
The correct term that represents the brightness of a celestial object measured from Earth is **Apparent magnitude**.
- **Absolute brightness** (or absolute magnitude) refers to the intrinsic brightness of a celestial object, as it would be seen at a standard distance of 10 parsecs (about 32.6 light-years) from the observer.
- **Luminosity** is the total amount of energy emitted by a star or celestial object per unit of time, regardless of distance.
- **Proto-star** is a stage in the formation of a star and not related to brightness measurements.
So, the answer is **Apparent magnitude**.
- **Absolute brightness** (or absolute magnitude) refers to the intrinsic brightness of a celestial object, as it would be seen at a standard distance of 10 parsecs (about 32.6 light-years) from the observer.
- **Luminosity** is the total amount of energy emitted by a star or celestial object per unit of time, regardless of distance.
- **Proto-star** is a stage in the formation of a star and not related to brightness measurements.
So, the answer is **Apparent magnitude**.