Why would a close star's brightness not be strictly related to their temperature?

Answer 1

Yes.

Stars appear to have different brightness for two main reasons:

1 The actual "luminosity" of the star itself. (That depends mainly on the star's temperature and surface area.)

2 The distance of the star from Earth.

Answer 2

How bright a star is how it is burning its gases and the color depends on WHAT gasses it is burning, the sun is red because it is seperating hydrogen atoms apart and creating helium atoms which have two orbiting particles. and in doing so it creates enormous amount of heat that is why the sun is both hot and red and bright.

Answer 3

This is mainly due to differences in mass. A more massive star will burn its fuel much faster. Also, the stars you see may be in different states of their life cycle. For example, in a few billion years, our Sun will be much brighter than now.

Answer 4

One star can be brighter than another because the first one:

• Has a greater surface temperature. Total energy output is approximately proportional to the fourth power of the absolute temperature.
• Has a larger diameter. Total area, and therefore brightness, is proportional to the square of the diameter.
• Is closer to us. This, of course, affects only its apparent brightness, not its real brightness.

Answer 5

Of course, it's easy to say that the bigger star would be brighter. However, brightness will also depend on how far or near the star is to us in relation to the other. Say, the larger star may be brighter, but because it's so much further away from us (Earth) than the smaller star, it may appear as dim as the smaller one.

Answer 6

No. Stars vary in size from teeny-tiny, barely-stars-at-all brown dwarfs to enormous blazing super-giants than are visible from other galaxies.

In fact, the closest star to our Sun is Proxima Centauri, a red dwarf so dim that it cannot be seen without a telescope.

Answer 7

The brightness of a star is related to it's temperature and it's distance from us.

The brightest star is our Sun, whereas the dimmest star is one which we cannot observe - either because it is too cool or it is too far away - or both.

Answer 8

No. Not a stellar expert here, but stars come in all sizes and colors. Red giants, main sequences, blue normals, white dwarves, super novas, and others. White dwarves are smaller than planets and invisible without a telescope. The Dog Star is an example of this, but somehow the Dogon tribesmen of Africa have known of its existence without telescopes for some time, and its exact position in earth's sky. Black holes are invisible even with the most powerful telescope, and their exisistence was proved mathematically by Stephen Hawking.
Yes. "Shining", emitting light and electromagnetic radiation generated by nuclear fusion, are the criteria for being a star.

Answer 9

No they do not.

Stars vary greatly in the amount and type of light they produce.

Some stars are very large, others very small compared to our sun this affects the amount of light they emit.

In addition a star may be actually brighter than another but be far more distant and appear less bright.

Answer 10

They are binary stars spinning around each other.