0
What else can I help you with?
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 are variable star?
Variable stars are stars whose brightness changes over time due to intrinsic or extrinsic factors. Intrinsic variables, like Cepheid and Mira variables, undergo changes in their own properties, such as pulsations or eruptions. Extrinsic variables, such as eclipsing binaries, have their brightness altered by external factors, like one star passing in front of another. These stars are important for studying stellar processes and measuring distances in the universe.
What is an apparent brightness?
An apparent brightness is the brightness of a star as measured by an observer.
What part of a star is called magnitude?
Magnitude refers to the brightness of a star. There are two main types: apparent magnitude, which is how bright a star appears from Earth, and absolute magnitude, which measures a star's intrinsic brightness.
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.
How do you describe a variable star?
A variable star is a star whose brightness as seen from Earth that fluctuates.
How do you describe variable stars?
A variable star is a star whose brightness as seen from Earth that fluctuates.
Which changes would changes would correspond to a decrease in a star's absolute brightness?
A decrease in a star's absolute brightness could be caused by the star moving farther away from Earth, interstellar dust blocking some of its light, or a decrease in the star's temperature. All of these factors would result in less light reaching Earth, causing a decrease in the star's apparent brightness.
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 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 are variable star?
Variable stars are stars whose brightness changes over time due to intrinsic or extrinsic factors. Intrinsic variables, like Cepheid and Mira variables, undergo changes in their own properties, such as pulsations or eruptions. Extrinsic variables, such as eclipsing binaries, have their brightness altered by external factors, like one star passing in front of another. These stars are important for studying stellar processes and measuring distances in the universe.
What measures the brightness of the star?
photographs use to measure the brightness of a star
What space words start with the letter v?
Well, I got a couple that I can think of off the top of my head Venus - Planet Virgo - Constellation Variable Star - A star whose brightness changes periodically Van Allen Belts - Radiation/Groups of charged particles that surround the Earth
How are the brightness and temperature related?
brightness and temperature are both related because brightness is actually tempature. However the system has become more refined. Instead of just looking at the star and determining magnitude one or magnitude two, an astronomer measures the brightness of the star using a device called a photometer. The photometer counts the number of photons coming from the star. This photon count is then compared to the photon count from a star whose magnitude is known. An accurate magnitude can then be calculated.
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 is the purpose of a star's brightness?
There is no purpose of a star's brightness. They just exist and shine.
