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A star whose brightness changes?
A star who's brightness changes is called a variable star.Examples are:AlgolPolarisBetelgeuse.See related link for more information.
What kind of star is a pulsating star?
A pulsating star is a type of variable star that changes in brightness due to periodic expansions and contractions of its outer layers. These changes can be regular or irregular, and the star's size and temperature vary over time. Examples of pulsating stars include Cepheid variables and RR Lyrae stars.
Why are Cepheid variable so important for measuring long distances in the universe?
The perceived brightness of an object with known brightness can be used to gauge distances. Cepheid variables are known to have a brightness directly related to their period. Which means that if we know the period of the Cepheid variable, we know what its brightness is, and can use it to gauge the distance to the stellar group the Cepheid is part of.
What is a variable star?
A variable star (or pulsating star) is a star that an earth observer sees as changing in luminosity over time. This variation in brightness may be something the star is "doing itself" because of changes in its nucleosynthetic processes, or it may be due to the passage of dust clouds or the like between the star and the observer. Wikipedia has more information, and you'll find a link to their post below.
What type of star is torcular?
Torcular is a type of Mira variable star that exhibits pulsations and periodic changes in brightness. These stars are red giants that have expanded and are nearing the end of their life cycle, with their outer layers becoming unstable and pulsating.
A star whose brightness changes?
A star who's brightness changes is called a variable star.Examples are:AlgolPolarisBetelgeuse.See related link for more information.
What kind of star is a pulsating star?
A pulsating star is a type of variable star that changes in brightness due to periodic expansions and contractions of its outer layers. These changes can be regular or irregular, and the star's size and temperature vary over time. Examples of pulsating stars include Cepheid variables and RR Lyrae stars.
What is a cephid star?
A cepheid (which take their name from prototypical stars in constellation Cepheus) is a type of star which varies or pulses over time. They are important to astronomy as they help establish a "standard candle" which helps in measurement of distance. The variation in brightness, size and spectrum is proportional to the density and size of the star; thus, the absolute magnitude can be calculated and the distance of a cepheid of a given luminance can be inferred from how quickly it changes. Hubble used this method to show that the "spiral nebulae" were in fact not close objects inside our galaxy but instead were distant galaxies.
How can a variable resistor be used to control the brightness of light?
A variable resistor can be connected in series with a light bulb in a circuit. By adjusting the resistance of the variable resistor, the current flowing through the circuit changes, affecting the brightness of the light bulb. Increasing the resistance decreases the current, resulting in lower brightness, while decreasing the resistance increases the current, leading to higher brightness.
Why are Cepheid variable so important for measuring long distances in the universe?
The perceived brightness of an object with known brightness can be used to gauge distances. Cepheid variables are known to have a brightness directly related to their period. Which means that if we know the period of the Cepheid variable, we know what its brightness is, and can use it to gauge the distance to the stellar group the Cepheid is part of.
A variable that changes as another variable changes?
dependent variable
What is a variable that changes as another variable changes?
the dependent variable
What is a variable that changes another variable changes?
the dependent variable
What is a factor that changes in an experiment due to the changes in the independent variable?
Changes in the independent variable will cause changes in the dependent variable.
How do you calculate the distance of nebulae?
There are many ways to calculate distance at huge scales. One popular way is using a Cepheid within the nebula. A Cepheid is a very luminous variable star (a star that changes brightness). The changing of brightness tells us a lot about the distance by measuring the period (time) and the luminosity. See the related link for more methods.
A variable that does not change as another variable changes-?
The variable that changes due to a change in another variable is known as 'dependant variable".
The factor that changes in an experiment is the variable?
Yes.The answer that changes is the variable
