Questions tagged [brightness]
The brightness tag has no usage guidance.
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Can a telescope ever increase the apparent luminance of an extended object?
From what I know about common telescope designs, telescopes don't increase the apparent luminance of extended objects compared to the luminance seen with the naked eye. In this sense extended objects ...
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1answer
34 views
Strip Brightness in a Spherical System
My question concerns the following problem, published in Galactic Dynamics by Binney and Tremaine and based on a work by Schwarzschild.
Specifically, I am having difficulties in deriving the given ...
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1answer
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How imperceptible will the 4-July-2020 penumbral lunar eclipse be?
Wikipedia's July 2020 lunar eclipse; Visibility says:
It will be visible from some parts of North America during moonrise, South and North America, the extreme part of Namaqua Land in South Africa ...
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1answer
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Is it possible to calculate how much a star's brightness dims when a planet transits in front of it from a viewer's perspective?
Last night I got to thinking about what would happen if Jupiter and Venus suddenly switched places.
Since Venus comes the closest to Earth than any other planet and Jupiter is much larger, does that ...
3
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1answer
158 views
How do we measure the brightness of the stars?
How do scientists measure the brightness of so distant stars?
