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What else can I help you with?
How does the brightness of a quasar compare with that of a large galaxy?
I assume when you mean brightness, you mean apparent magnitude as opposed to absolute magnitude. The quasar 3C 273 has an apparent magnitude of about 12.8 whereas the brightest galaxy - the Large Magellanic Cloud has an apparent magnitude of 0.9. However, in absolute magnitudes, 3C 273 has an absolute magnitude of about -26.7 very similar to our own Sun.
What two groups of stars can have similar brightness?
First let's assume the question is about a star's actual brightness not apparent brightness as seen from Earth. There are in fact several possibilities. The Hertzprung-Russell diagram is helpful here. One possibility is red dwarfs and white dwarfs. Of course there's large variation within these groups, but a red dwarf can certainly have a luminosity that's similar to a white dwarf. If the question is about apparent brightness, then a distant luminous star can appear similar in brightness to a nearby faint star.
How do you measure absolute magnitude?
The absolute magnitude is the magnitude (brightness) an object would have at a standard distance - how bright would it look at a standard distance. For a star or galaxy, the standard distance of 10 parsecs is commonly used.
05. What two parameters does the brightness of a star depend on?
The brightness of a star - or apparent magnitude [See related question] is how bright a star is as viewed from Earth. Therefore, if we have two stars of similar luminosity but one is twice as far away, then the further star would appear dimmer than the closer star. There are more luminous stars than our Sun but because the Sun is a lot closer, it is brighter. So the brightness of a star depends on it's luminosity and it's distance from the observer. A stars luminosity is a factor of how hot it is, and how big it is.
When was The Absolute at Large created?
The Absolute at Large was created in 1922.
The brightness of a star as seen from earth?
Absolute magnitude. Two stars of the same absolute magnitude usually do not have the same apparent magnitude because one may be much farther from us than the other. The other that is farther away will appear dimmer. To compare absolute brightness, astronomers determine what magnitude the stars would have if they were at a standard distance of about 32.6 light years. The sun has an apparent magnitude of -26.7, if located at a distance of 32.6 light years, have an absolute magnitude of 5. Stars with absolute magnitude values lower than 5 are brighter than the sun. Because of their distance, however, they appear much dimmer.A lot brighter than you think actually.
Which stars always have large positive absolute magnitude?
Does it mean that the star is a main sequesnce star? ( . Y . ) The above isn't true. A star can be a blue supergiant and be on the main sequence but still not be even visible to us, therefore the apparent and absolute magnitude wouldn't be the same. But to answer your question, I don't think it has a name, it just means that you are seeing the star's absolute and apparent magnitude at the same time, so if you placed the star at 32.6 light years away(the absolute magnitude scale)then the star would not appear to change in brightness
Why does a star such as betelgeuse which is located far from earth have a much greater absolute magnitude than apparent magnitude?
well my reason is that the betelgeuse must be very large , because they said that the betelgeuse is located far from earth .
Why does a star such as Betelgeuse which is located far from earth have much greater absolute magnitude than apparent magnitude?
well my reason is that the betelgeuse must be very large , because they said that the betelgeuse is located far from earth .
How could a smaller star have a greater magitude than a larger star?
A smaller star can appear brighter from Earth (apparent magnitude) if it is much closer. The absolute magnitude (brightness compared side by side at fixed distance) can also be higher in a smaller star if it is much hotter and more massive. A smaller star can be much heavier (more dense) and hotter than a large star, especially the huge red giants nearing the end of their life (which have a very low density).
Apparent in a sentence?
His mistakes was apparent, for he had large red marks over his answers.
Why can you see the moon so brightly?
The apparent brightness of any object depends on three factors. 1. Actual size 2. Distance 3. Actual brightness The Moon isn't especially bright; it doesn't shine on its own and the surface is gray dust, so it isn't all that good a reflector. But it's fairly large, and it is VERY CLOSE as celestial bodies go. The Moon is very bright because it reflects sunlight and is very close to Earth.
