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The apparent magnitude of a star is dependent on the star's size, temperature and distance from where it is observed. An absolute magnitude is determined by the same three factors, but the distance is fixed at 10 parsecs.
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What 2 factors determine a star's apparent magnitude?
There are three factors, actually. The star's size and temperature determine the absolute magnitude, or how bright the star really is. Those two factors can be considered as one - the star's absolute magnitude. The absolute magnitude combined with our distance from the star determines its apparent magnitude, or how bright the star appears to be from Earth. So, a big, hot, super bright star very far away may have the same apparent magnitude as a small, cool star that's fairly close to the Earth.
What are three factors that determine the apparent magnitude of a star?
Its real (absolute) magnitude; its distance from Earth; the amount of light that's absorbed by matter between the star and us (extinction); distortions due to gravitational lensing.
What factor is not used to determine a star's apparent magnitude?
how dense the star is
What are three physical factors that determine a star's brightness?
Three physical factors that determine a star's brightness are its temperature (hotter stars are brighter), size (larger stars are generally brighter), and distance from Earth (the closer a star is, the brighter it appears).
What factors do not affect the absolute magnitude of a star?
The absolute magnitude of a star is not affected by its distance from Earth, its spectral type, or its position in the galaxy. Instead, it is a measure of the star's intrinsic brightness, specifically how bright it would appear at a standard distance of 10 parsecs. Factors like the star’s age or its surrounding environment also do not influence its absolute magnitude.
What are three ways we determine a star?
It isn't clear what you want to determine about the star.
What 3 factors determine a stars apparent magnitude?
A star's apparent magnitude is determined by its intrinsic brightness (absolute magnitude), its distance from Earth, and any interstellar material that may absorb or scatter its light. The closer a star is to Earth, the brighter it appears, while more distance results in a dimmer appearance. Additionally, dust and gas in space can diminish the light that reaches us, further affecting how bright the star seems.
What is the difference between a twelfth magnitude and fifteenth magnitude star?
The main difference is brightness: a twelfth magnitude star is brighter than a fifteenth magnitude star. Magnitude is a logarithmic scale, so each step in magnitude represents a difference in brightness of about 2.5 times. This means a twelfth magnitude star is approximately 12.5 times brighter than a fifteenth magnitude star.
What is a star brightness called?
the brightness of a star is called it's magnitude
Star A is a first magnitude star. Star B is a sixth magnitude star. Which star is brighter and by how much?
A magnitude 1 star is 100 times brighter than a magnitude 6 star.A magnitude 1 star is 100 times brighter than a magnitude 6 star.A magnitude 1 star is 100 times brighter than a magnitude 6 star.A magnitude 1 star is 100 times brighter than a magnitude 6 star.
What is star's magnitude?
The magnitude is the brightness of the star.
What are the three methods for determining how far away a star is from Earth?
Triangulation using the base of Earth's orbit and parallax observations.Use of Cepheid variable starsUse of the star's colour spectrum to determine it's luminosity and comparison of that with its apparent magnitude.
