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a star is made up of burning gases which makes it a luminous body.
the sun is the only star in the solar system. the brightest star except
the sun is sirius
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List three factors that control the apparent brightness of a star as seen from earth?
The apparent brightness of a star is determined by its luminosity (true brightness), distance from Earth, and any intervening dust or gas that may absorb or scatter its light. These factors affect how bright a star appears in the night sky to an observer on Earth.
Why must astronmers figure out a star's distance to calculate it's actual brightness?
A star's actual brightness, known as its luminosity, is related to its distance through the inverse square law. This means that a star's apparent brightness decreases with increasing distance. By determining a star's distance, astronomers can accurately calculate its luminosity, providing crucial information about its size, temperature, and energy output.
What is it called when a star suddenly increases in brightness?
A nova is a star that suddenly increases in brightness.
Why can apparent magnitude be a misleading number?
Apparent magnitude can be a misleading number because they do not necessarily correspond with the actual brightness of the star. The apparent magnitude is the number given to a star based on how bright it looks.
Which factor does not affect the apparent brightness of a star?
How old a star is.
The actual brightness of a star is called?
magnitude
A star's brightness is the brightness seen by humans on Earth. A star's brightness is its actual brightness and does not depend on where the star is viewed from.?
The brightness as seen from Earth is called the "apparent magnitude".The real brightness (defined as the apparent brightness, as seen from a standard distance) is called the "absolute magnitude".
What two things must an astronomers find out in order to calculate a star's absolute brightness?
It's distance from Earth and the star's actual brightness
What two factor affect a stars apparent brightness?
Two factors that affect a star's apparent brightness are: 1.) The distance between the Earth and the star 2.) The absolute magnitude (the actual brightness) of the star Hope that helps :P
Why is polaris considered to be a very bright star even though it is not a bright star in earths sky?
That refers to its actual brightness, not to how we see it. The apparent brightness depends on the real ("absolute") brightness, but also on the distance.
How bright a star appears to be in the night sky depends on its actual brightness and its?
Distance from Earth.
What is a stars brightness as if it were a standard distance?
A star's brightness at a standard distance is referred to as its apparent magnitude. This standard distance is 10 parsecs (32.6 light-years) from Earth. Apparent magnitude allows astronomers to compare the brightness of stars as seen from Earth, regardless of their actual distance from us.
Why does a star look smaller than another star but is bigger than the other star?
Normally you would observe the star's brightness, not its apparent diameter.The star's apparent brightness ("apparent magnitude") depends on its real brightness ("absolute magnitude"), and on the distance. Similarly, the star's apparent angular diameter (which is VERY hard to measure) would depend on its actual diameter, and on the distance.
What does the absolute brightness of the star depend on?
the brightness of a star
What is the measure of the star's brightness?
The measure of a star's brightness is its magnitude. A star's brightness as it appears from Earth is called its Apparent Magnitude.Star's brightness is measured by there magnitude.
What is Actual brightness of a star?
a star is made up of burning gases which makes it a luminous body. the sun is the only star in the solar system. the brightest star except the sun is sirius
List three factors that control the apparent brightness of a star as seen from earth?
The apparent brightness of a star is determined by its luminosity (true brightness), distance from Earth, and any intervening dust or gas that may absorb or scatter its light. These factors affect how bright a star appears in the night sky to an observer on Earth.
