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what do you think size tells us about absolute brightness ?

  • Listed: 24 June 2024 14 h 03 min

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what do you think size tells us about absolute brightness ?

Here are some links that might be useful to you:

https://www.space.com/21640-star-luminosity-and-magnitude.html

https://www.space.com/21640-star-luminosity-and-magnitude.html
Luminosity and magnitude explained | Space
However, the brightness of a star depends on its composition and how far it is from the planet. Astronomers define star brightness in terms of apparent magnitude — how bright the star appears …

https://earthsky.org/astronomy-essentials/stellar-luminosity-the-true-brightness-of-stars

https://earthsky.org/astronomy-essentials/stellar-luminosity-the-true-brightness-of-stars
Star brightness versus star luminosity | Astronomy Essentials | EarthSky
We use the equation below to solve for the star’s luminosity, relative to the sun’s, where L = luminosity and T = surface temperature, and the surface temperature equals 2 solar. L = T 4. L …

https://www.thoughtco.com / hertzsprung-russell-diagram-4134689

https://www.thoughtco.com / hertzsprung-russell-diagram-4134689
What the Hertzsprung-Russell Diagram Reveals about Stars – ThoughtCo
Think of luminosity as a way to define the brightness of an object. Temperature is something we’re all familiar with, generally as the heat of an object. It helps define something called a star’s spectral class, which astronomers also figure out by studying the wavelengths of light that come from the star. So, in a standard H-R diagram …

https://www.learnthesky.com/blog/apparent-versus-absolute-magnitude

https://www.learnthesky.com/blog/apparent-versus-absolute-magnitude
Apparent versus Absolute Magnitude – Learn the Sky
Absolute magnitude is the brightness of a star from a distance of 10 parsecs away. A parsec is equal to 3.26 light-years. Each object in the sky has a designated apparent and absolute magnitude value. For example, Sirius, the brightest star in the night sky, has an apparent magnitude of -1.46 and an absolute magnitude of +1.42.

https://www.teachastronomy.com/textbook/Properties-of-Stars/Absolute-Brightness

https://www.teachastronomy.com/textbook/Properties-of-Stars/Absolute-Brightness
Teach Astronomy – Absolute Brightness
The distinction between apparent and absolute brightness would not be important if all stars had the same energy output. Imagine a large darkened room scattered with 100-Watt light bulbs. … Even if we could see a star’s size, it would not help us estimate absolute brightness or luminosity since stars have a huge range of .

https://phys.libretexts.org/Bookshelves/Astronomy__Cosmology/Astronomy_1e_(OpenStax)/17:_Analyzing_Starlight/17.01:_The_Brightness_of_Stars

https://phys.libretexts.org/Bookshelves/Astronomy__Cosmology/Astronomy_1e_(OpenStax)/17:_Analyzing_Starlight/17.01:_The_Brightness_of_Stars
17.1: The Brightness of Stars – Physics LibreTexts
If m 1 and m 2 are the magnitudes of two stars, then we can calculate the ratio of their brightness (b2 b1) ( b 2 b 1) using this equation: m1 −m2 = 2.5 log(b2 b1) or b2 b1 = 2.5m1−m2 m 1 − m 2 = 2.5 log. ⁡. ( b 2 b 1) or b 2 b 1 = 2.5 m 1 − m 2. Here is another way to write this equation:

https://askanydifference.com/difference-between-landscape-and-portrait

www.physicsbootcamp.org/sec-Luminosity-of-Stars.html
Luminosity and Temperature of Stars
The flux (F) of a star measured on Earth is called its apparent brightness. Sometimes, we designate the apparent brightness by (F_m) to distinguish it from a related quantity called absolute brightness which is the brightness of the star if the said star were 10 pc away instead of (r) away. We will denote the by (F_M …

https://openstax.org/books/astronomy/pages/17-1-the-brightness-of-stars

https://openstax.org/books/astronomy/pages/17-1-the-brightness-of-stars
17.1 The Brightness of Stars – Astronomy | OpenStax
After all, the luminosity is a really important characteristic that tells us a lot about the object in question, whereas the energy that reaches Earth is an accident of cosmic geography. To make the comparison among stars easy, in this text, we avoid the use of magnitudes as much as possible and will express the luminosity of other stars in …

https://www.astronomy.ohio-state.edu/pogge.1/Ast162/Unit1/bright.html

https://www.astronomy.ohio-state.edu/pogge.1/Ast162/Unit1/bright.html
Lecture 7: Brightnesses of Stars – Ohio State University
The modern system of magnitudes defines them as follows: 5 steps of magnitude = factor of 100 in brightness. Bigger magnitude = fainter star. The standard of brightness is the star Vega (0th magnitude) Examples: 10th mag star is 100x fainter than a 5th mag star. 20th mag star is 10,000x fainter than a 10th mag star.

https://www.skyatnightmagazine.com/space-science/stellar-magnitudes-how-measure-star-brightness

https://www.skyatnightmagazine.com/space-science/stellar-magnitudes-how-measure-star-brightness
Stellar magnitude, the scale to measure the brightness of stars – BBC …
Stellar magnitude, the scale to measure the brightness of stars – BBC Sky at Night Magazine. A beginner’s guide to stellar magnitude, how astronomers measure a star’s brightness and which are the brightest objects in the sky.
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