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What is the symbol for CEPHEID in NASDAQ?
The symbol for CEPHEID in NASDAQ is: CPHD.
In what year did CEPHEID - CPHD - have its IPO?
CEPHEID (CPHD) had its IPO in 2000.
What is the market cap for CEPHEID CPHD?
As of July 2014, the market cap for CEPHEID (CPHD) is $2,827,322,635.80.
What is the most accurate way to determine the distance to a very distant irregular galaxy?
Cepheid variables
What is cepheid phase?
The Cepheid phase is a stage in the life cycle of a star where the star pulsates in a predictable manner, changing in brightness over a fixed period of time. This pulsation is used by astronomers to accurately measure the distance to Cepheid variable stars and other celestial objects.
What does the company Cepheid manufacture?
Cepheid is a company that works to improve healthcare by marketing and manufacturing molecular systems and tests that are not difficult to use. They are working on cancers and infectious diseases in particular.
How is the brightness of a Cepheid star calculated by knowing the period?
The brightness of a Cepheid star is determined by its period-luminosity relationship, which is a relationship between the star's variability period and its intrinsic luminosity. By measuring the period of a Cepheid star, astronomers can use the period-luminosity relationship to calculate its luminosity, and from there determine its apparent brightness as observed from Earth.
Are all red giants Cepheid Variables?
No, not all red giants are Cepheid variables. Cepheid variables are a specific type of variable star that pulsates regularly, making them useful for measuring cosmic distances. Red giants, on the other hand, encompass a broad class of stars in the later stages of their evolution, which may or may not exhibit variability in their brightness.
What is the pulsation period of a Cepheid star?
The pulsation period of a Cepheid star typically ranges from a few days to a few months. This period is directly related to the star's intrinsic brightness, making Cepheids useful for measuring astronomical distances.
How do you pronounce cepheid?
seh-fee-id or see-fee-id (most common pronunciations I think:) 'seh' as in seven or 'see' as in 'sea' Important variable star for distance calculations.
How are cepheid variables used in determining distance?
Cepheid variables are a type of pulsating star whose brightness varies in a regular pattern. The key relationship used in distance measurement is the period-luminosity relation, which states that the longer the pulsation period of a Cepheid, the more luminous it is. By measuring the period of a Cepheid's brightness fluctuations, astronomers can determine its absolute brightness and compare it to its observed brightness to calculate the distance using the inverse square law of light. This method allows for accurate distance measurements to nearby galaxies and helps establish the scale of the universe.
Which kind of object is the best standard candle?
A Cepheid variable or a nova depending on what you are trying to observe.
