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If the Sun were located at the very rim of the galaxy,would that change how we observe the Milky Way as a band of lightthat wraps all the way around the Earth?...

Question

If the Sun were located at the very rim of the galaxy,would that change how we observe the Milky Way as a band of lightthat wraps all the way around the Earth?

If the Sun were located at the very rim of the galaxy, would that change how we observe the Milky Way as a band of light that wraps all the way around the Earth?



Answers

Suppose the Milky Way was a band of light extending only halfway around the sky (that is, in a semicircle). What, then, would you conclude about the Sun's location in the Galaxy? Give your reasoning.

All right, So what we're told in this problem is that stars up here dimmer. But as long as you can still identify the angle at which the star is being viewed, whether it's dim or bright, as long as you can accurately identify that angle, it would have no effect when parallax now the star being dimmer, may make it harder to identify exactly what that angle is. So perhaps slightly less, um, accuracy, but overall very little effect. However, spectroscopic parallax is different, and in the first when I was talking about tricking the metric Parallax. Now we're told in table 13.3 that you need to use the H R diagram to find the luminosity in order to do this spectroscopic parral X method and then you also relate luminosity to distance and brightness, and so distances calculated based on brightness and based on luminosity. But brightness is affected by the phenomenon as being too this being described Trigana Metric and the the um, the dust in the Milky Way galaxy. So I would think that it would have a large impact because of the need to identify the brightness

So over the course of a billion years Ah, lot of star formation will occur. Uh huh. Ah, lot of the young, um oops. Not young. A lot of the massive stars. More massive stars will burn brightly and then die quickly. Um, and so the color of the galaxy will actually, uh, turn from blue to red relatively soon. So the galaxy gets read over time because of because the galaxy population, um are the stellar population becomes it's not younger, but older. Still, the population gets older. That's great. On DSO, older stars dominate less massive these or less massive. And on dso, the spectrum gets redder on because and, uh, the mass of the stock on eso. So the galaxy retains a lot of it's mass. Um, and so the luminosity will also go up. Luminosity of a galaxy will also go up because it retains its mass. So these, uh, stars that are left are evolved stars and so evolved stars such as red giant stars are brighter. Um, then your regular main sequence stars, and so these redder and so the galaxy is not just redder, but also more luminous as time goes on

So what this question is posing theoretically is what would happen if the wavelengths that photosynthesis needed. We're not the ones that occurred on Earth. So how are you going? Let's just look at what happens on Earth that like makes photos. It's this possible. So we know that the blue range and the red range of light that is emitted from the Sun is what capitalizes photosynthesis. And we can see here are the things that I wrote that is from 4 25 to 4 50 nanometers of the blue And 600 700 families for the red. So this also poses a question. I thought we were going over why they are chloroplast green and why are plants green from that? The blue or red was because they absorb the blue and red and the unusable raise. The rest of the spectrum are bounced off and the ones are bounced off our green. So if you think about like that, if there are to be plants on other planets that had a star like the sun, but it admitted different wavelengths of light. The only feasible outcome that you could think of with that they wouldn't be green. And it's just because if they were having a different wavelength of light, they wouldn't be absorbing the same ones we have here on earth. So the plants might be red, yellow, blue, you name it because they must be accepting the wavelengths that we have on earth that are an example. So that's really the only feasible outcome you can think of. And it all comes down to what the file coins except. And uh like I said, if they want to accept the blue and red range, then naturally they'll accept other ones and the plants will be a different color.

The Sooner Australia Radius is given by two G turns massive. The black hole divided by speed off lightsquared putting numbers. And we have to dance 6.67 times gentle unaided, 11 times the mass of the black hole, which is 0.8 times 10 to the negative, too divided by the speed off light three times 10 to the eight meters per second squared. So that comes out to be 2.37 times. Tend to the to us year of, uh, meter. Now that we with God's our aid, we'd once kids are may be 1000 meter times who are like year being 9.46 times tend to that Wells, you got me. Good. So this comes out to be 25.5 light years.


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