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Most of the light in normal galaxies is emitted by stars, particularly those in the main sequence phase, which are the hottest and most luminous. Young, massive stars contribute significantly to the light output due to their brightness, while older stars, including red giants and white dwarfs, also play a role in the total luminosity. Additionally, regions of star formation and emission nebulae can enhance the light emitted in specific wavelengths, particularly in the visible and ultraviolet spectra. Overall, the combined light from a diverse population of stars and stellar processes dominates a galaxy's luminosity.
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Why did Hubble find out about the most distance galaxies?
Hubble discovered the most distant galaxies primarily through his observations of redshift, which revealed that galaxies are moving away from us. This shift in the light spectrum indicated that the universe is expanding, allowing astronomers to infer the distance of these galaxies. By analyzing the light from these distant objects, Hubble was able to identify galaxies that were billions of light-years away, pushing the boundaries of our understanding of the universe's size and age. His work laid the foundation for modern cosmology and our understanding of the universe's evolution.
How did Edwin hubble sub-categorize spiral galaxies?
Hubble devised subcategorization for spiral galaxies first based on whether the galaxy exhibited a bar and then how well the spiral arms were defined. The classes are designated as Sa, Sb, and SC with the Sa class being the most tightly wound. A capital B designation after the S indicates the presence of a bar as well.
What layer emits the light we see of the sun?
The part of the sun that is going to emit the most visible light is going to be the Photosphere
When astronomers investigate the most distant galaxies they see evidence that?
When astronomers investigate the most distant galaxies, they find evidence that the universe was much younger and more active in its early stages. Observations of these galaxies reveal higher rates of star formation and interactions, suggesting that they were in a more chaotic and dynamic state. Additionally, the light from these galaxies has taken billions of years to reach us, allowing astronomers to study the evolution of galaxies over cosmic time. This research helps to deepen our understanding of the universe's formation and the processes that shaped its structure.
What color do elliptical galaxies tend to be and why?
Elliptical galaxies tend to be reddish in color because they are made up of older stars that emit more red light. These galaxies have used up most of their gas and dust, resulting in a lack of ongoing star formation. This makes their overall color appear reddish compared to younger, bluer galaxies.
What is the red shift of light from most galaxies is evidence that?
The most plausible explanation for the redshift is that galaxies are moving away from us. This is similar to the Doppler effect, but it is normally believed that space itself is expanding, so the situation is a bit different from the "normal" Doppler effect.
What does light reaction produce?
Light pollution sometimes. But most time it produces the light that emits in a better way.
How large are most galaxies?
i would say a couple light years.
What gas is the most common in nebulae?
The most common gas in nebulae is hydrogen. Hydrogen makes up about 90% of the atoms in the universe and is the building block for stars and galaxies. It emits light in the red part of the spectrum, creating the characteristic pink or red glow of many nebulae.
What radiates most of the sunlight we see?
The photosphere of the sun emits visible light.
The Sun emits its most intense radiation as?
The Sun emits its most intense radiation as ultraviolet light and visible light. This radiation is produced by nuclear fusion occurring in the Sun's core, where hydrogen atoms combine to form helium atoms, releasing large amounts of energy in the process.
How far away are the most distant galaxies?
That is impossible to answer because scientist don't know ALL the galaxies.
Will you move into another galaxy?
Not in the near future. Other galaxies are hundreds of thousands, or millions, of light-years away; travelling at the speed of light, it would thus take millions of years to travel to most galaxies; travelling at a lower speed would, of course, take longer.Not in the near future. Other galaxies are hundreds of thousands, or millions, of light-years away; travelling at the speed of light, it would thus take millions of years to travel to most galaxies; travelling at a lower speed would, of course, take longer.Not in the near future. Other galaxies are hundreds of thousands, or millions, of light-years away; travelling at the speed of light, it would thus take millions of years to travel to most galaxies; travelling at a lower speed would, of course, take longer.Not in the near future. Other galaxies are hundreds of thousands, or millions, of light-years away; travelling at the speed of light, it would thus take millions of years to travel to most galaxies; travelling at a lower speed would, of course, take longer.
The spectra of most galaxies show redshifts this means that their spectral lines?
have wavelengths that are longer than normal:)
What type of light does the sun emit most strongly, and is it visible to the human eye?
The sun emits visible light most strongly, which is the type of light that is visible to the human eye.
What is an extremely remote celestial object that emits an exceptionally large amount of energy?
An extremely remote celestial object that emits an exceptionally large amount of energy is a quasar. Quasars are ultra-bright active galactic nuclei powered by supermassive black holes at their centers, releasing immense amounts of energy as they accrete surrounding matter. They are among the most luminous objects in the universe and can outshine entire galaxies, making them visible across vast distances. Their light provides valuable insights into the early universe and the formation of galaxies.
Where does lighting originated?
The vast majority of light that is received by Earth originates from the sun, our star. However, we receive light from all the stars and galaxies that we can see.*Every natural object on earth emits light, after absorbing the sun's energy. However, unless the object is extremely hot, the vast majority of that light is usually in a form you cannot see, light waves in the infrared spectrum. Most objects also scatter or reflect light from their surfaces.
