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Sirius is actually a binary star system.

  • Sirius A has a luminosity of 25.4 solar luminosity
  • Sirius B has a luminosity of 0.026 solar luminosity

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13y ago
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9y ago

The Andromeda galaxy (or M31) has an estimated luminosity of 26 billion times the luminosity of the Sun.. or in other words, about 25% brighter than the Milky Way; however, some intergalactic dust tends to obfuscate our view and some estimates are higher.

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7y ago

Orion is a constellation, not a single star. The constellation contains a very large number of stars and other cosmic objects which have no astrophysical relationship with one another. It is simply that they are located in such direction, and are so far away, that they appear to move together. The brightest is RIgel, with an apparent magnitude of 0,18, the seventh brightest star. Others cannot even be seen from earth based telescopes.

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Q: What is the luminosity of Andromeda?
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What is the luminosity of polaris?

Polaris has a luminosity of 2,200 solar luminosities.


How do you measure the distance to a cepheid?

Cepheids have a certain relationship between their period, and their absolute luminosity. Thus, their absolute luminosity can be determined. Comparing this with their apparent luminosity allows us to calculate their distance.Cepheids have a certain relationship between their period, and their absolute luminosity. Thus, their absolute luminosity can be determined. Comparing this with their apparent luminosity allows us to calculate their distance.Cepheids have a certain relationship between their period, and their absolute luminosity. Thus, their absolute luminosity can be determined. Comparing this with their apparent luminosity allows us to calculate their distance.Cepheids have a certain relationship between their period, and their absolute luminosity. Thus, their absolute luminosity can be determined. Comparing this with their apparent luminosity allows us to calculate their distance.


Why is the suns luminosity 1?

A solar luminosity is equal to the current luminosity of the Sun, which is 3.839 × 1026 W, or 3.839 × 1033 erg/s.So dividing one solar luminosity with the Suns luminosity gives 1.Also it is a lot easier talking about a luminosity of 1 rather than 3.838 x 1026 W, the same way astronomers use 1 AU to mean 150,000,000km.


How does the luminosity of a blackbody vary with its surface temperature?

Both the absorption and the luminosity of a blackbody in equilibrium increase in magnitude with increasing temperature, and the spectral distribution of the luminosity increases in frequency (decreases in wavelength).


What correctly describes the relationship between the luminosity of two stars that have the same radius?

The star that is hotter will have a higher luminosity.

Related questions

How did Edwin Hubble measure the distance to the Andromeda Galaxy?

He applied the period-luminosity relation to Cepheid variables.


What is a sentence with luminosity in it?

I was enthralled by the luminosity of the deep water jellyfish.


Why is Andromeda called Andromeda?

Andromeda means "ruler of men".


How is star luminosity measured?

A star's luminosity is measured according to the relevance to the sun. Basically for example, if a star is 8,300 degrees Celsius and has a luminosity of 0.001; the luminosity is compared to the sun.


Who is the guy in the Luminosity commercial?

Michael Emerson is in the Luminosity commercial.


What is luminosity of the Rigel?

Rigel has a luminosity of 117,490 solar luminosities.


What is the luminosity of polaris?

Polaris has a luminosity of 2,200 solar luminosities.


Why was the Andromeda galaxy named after Andromeda?

Because it is located in the Andromeda Constellation.


What is the luminosity of the sun?

The absolute luminosity is about 3.839×1026 W, or 3.839×1033 erg/second. The comparative luminosity of an astronomical object is based on the Sun, so it has a relative luminosity of 1.


What is a sentence with luminosity?

The stars in the night sky shine with a remarkable luminosity.


How do you determine a stars luminosity?

To determine a star's luminosity is from size and temperature.


What is meant by the term Andromeda?

The term Andromeda can mean several different things. In mythology, Andromeda is the daughter of Cassiopeia and Cepheus. Andromeda also can refer to the Andromeda Galaxy, which is 2.5 million light years away from us. Andromeda is also a television series and there's a game called Andromeda. Andromeda can refer to any of these things.