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What two things must an astronomer find out in order to calculate a starts absolute brightness?
Wiki User
∙ 9y ago
Three things, really. An astronomer needs to determine the apparent brightness of a star or other object, and needs to know its distance. He would also need to have an estimate about extinction - that is, how much of the light is absorbed on its way.
Wiki User
∙ 9y ago
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What is the measurement that starts with absolute zero?
The measurement that starts with absolute zero is temperature measured in Kelvin. In the Kelvin scale, absolute zero is the point at which all thermal motion ceases, making it the lowest possible temperature.
What is kelvin of -255?
There is no such thing as negative Kelvin. The Kelvin temperature scale starts at absolute zero, which is the point where all atomic motion stops. Negative values below absolute zero are not physically meaningful.
Is 278k equal to 5 degrees C?
No, 278k is equal to 5 degrees Celsius. The Kelvin scale starts at absolute zero, whereas Celsius scale starts at 0 degrees C with water freezing point at 0 degrees C.
Why is the Kelvin scale not expressed in degrees like the Celsius scale?
The Kelvin scale is an absolute temperature scale that starts at absolute zero, the point at which all molecular motion ceases. Since there are no negative temperatures in the Kelvin scale, it is not expressed in degrees. On the other hand, the Celsius scale is relative to the freezing and boiling points of water, hence it is expressed in degrees.
What two factors affect how bright a star appears in the night sky?
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
Who is A famous astrologer whose name starts with g?
Galileo Galilei is a famous astronomer. He was an Italian astronomer. He was born in 1564 and died in 1642.
Who is the first astronomer to explain why the sun and stars move across the sky?
Galileo was the first astronomer to explain why the sun and starts travel across the sky
What does an astronomer use that starts with c?
Astronomers use a camera. It begins with the letter c.
What is the measurement that starts with absolute zero?
The measurement that starts with absolute zero is temperature measured in Kelvin. In the Kelvin scale, absolute zero is the point at which all thermal motion ceases, making it the lowest possible temperature.
What are the three diffrent types of scales that mesure and teputure?
The Absolute scale (degrees Kelvin) which starts at absolute 0. The Centigrade scale that starts at the freezing point of ice. The Fahrenheit scale that starts at the freezing point of brine.
What are absolute pathnames in unix?
An absolute path name is one that starts at the root directory and navigates from there. An absolute path name can be accessed from anywhere in the system without having to navigate to it.
Famous person name that is alive or dead that starts with G?
Mikhail Gorbachev was the President of the Soviet Union. Galileo Galilei was an astronomer.
What is the unit of temperature on the kelvin scale?
The Kelvin, abbreviated K. The scale starts at absolute zero.
What is the difference between absolute temperature scale and kelvin scale urgent I am convinced that there is a difference?
The Kelvin scale is an absolute temperature scale where 0K represents absolute zero. The absolute temperature scale refers to any temperature scale that starts at absolute zero, such as the Kelvin scale. So, the Kelvin scale is a specific type of absolute temperature scale.
Is absolute temperature is same like absolute zero?
No, but they are related. Absolute zero is the coldest possible temperature. Absolute temperature is the temperature above this coldest possible temperature - i.e., how much hotter is it than the coldest theoretically possible temperature. Celsius temperature isn't absolute. It starts from the temperature of freezing water, and it needs negative numbers for anything colder than that. Fahrenheit temperature isn't absolute. It says that zero is 32 degrees colder than freezing water, and it needs negative numbers for anything colder than that. Absolute temperature starts from absolute zero. Nothing is colder than that, so absolute temperature is never a negative number.
What is an instrument used to calculate that starts with A?
The word you're looking for is... Abacus.
Which is larger an object's celsius temperature or it's kelvin temperature?
Its Kelvin temperature. The Kelvin scale starts at absolute zero and goes up. Absolute zero on the celsius scale is -273.15oC
