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The star is hotter because the fusion process is more energetic, and photons are emitted as a result of fusion. So more energetic fusion...more energetic photons. On the electromagnetic spectrum, higher energy is to the right, which is the "brighter" end of the spectrum.
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Does a star get brighter when is hot or cold?
Any hot object will glow brighter when it is hotter.
What happens to brightness as surface temperature of the main sequence stars increase?
The hotter the star, the brighter. Ex: A stove
What happens to the brightness of main sequence stars as they get hotter?
As they get hotter, they usually get brighter.
Is there a star that is hotter than the sun?
Yes, many stars are brighter than our sun. Deneb and Rigel are two examples. Rigel is over 100,000 times brighter than Sol.
What makes some stars appear brighter than others the temperature or the size?
It is a mixture of both. A hotter star will generally appear brighter than a cooler star of the same size. Similarly, a large star will appear brighter than a small one of the same temperature. The brightest stars are generally red supergiants, which are comparatively cool stars, but are so large that their size more than makes up for it. A star's apparent brightness from any given vantage point also depends on its distance. The closer a star is to you, the brighter it will appear.
What are the factors that make one star appear brighter than another star?
The size of the star, because the smaller the star the hotter it is because of nuclear fusion. So the hotter the brighter.
The bigger the hotter the star the what?
The bigger the COOLER the brighter.
Does a star get brighter when is hot or cold?
Any hot object will glow brighter when it is hotter.
Is Sun hotter than the star VV cephie?
You know, VV cephie is orange, sun is yellow and yellow is brighter than orange and the brighter the star is, the hotter it gets. So sun is hotter than VV cephie.
How does the HR diagram explain why some smaller cooler stars are brighter than larger hotter stars?
In terms of absolute magnitude, a larger hotter star will necessarily be more luminous than a smaller cooler star. However, if a smaller cooler star is much closer to us than a larger hotter star, it may appear to be brighter. None of this has anything to do with the HR diagram.
Why do stars with smaller masses burn longer than stars with larger masses?
Stars with larger masses have stronger gravity; this results in more pressure; which in turn makes the star hotter. As a result of the higher temperature, they will shine brighter, and burn their fuel much faster.
What happens to brightness as surface temperature of the main sequence stars increase?
The hotter the star, the brighter. Ex: A stove
Will a super red giant live longer than a red giant star and which will burn hotter?
A supergiant is brighter than a red giant. That means it spends its energy faster, and lives less. To burn its energy faster, it must be hotter in its nucleus. That doesn't necessarily mean that its surface temperature is faster (rather, it will usually be bigger, and have a larger surface to irradiate).
Why will a star with a large mass radiate more energy into space and appear hotter and brighter than a star with a smaller mass?
Because the larger mass means more core pressure, making fuel (hydrogen turning into helium) burn faster and more frequently, resulting in a hotter, brigher star. A small mass star has less fuel and internal pressure, so it generates less light and is red in color. A medium star like our sun burns moderately, and is yellow. The H-R Diagram places these stars in spectral classes, from biggest and hottest to smallest and dimmest, and the orders are O, B, A, F, G, K and M. We are a type G star. Think of a fire; the more fuel you put on it, the hotter and brighter it blazes and it can become white-hot if it is a very intense fire. As the ashes burn down, the fire is smaller, dimmer and the coals appear red, which is cooler. The principle is the same with stars; the bigger and hotter they are, the brighter they burn but they have shorter lives than do moderate and small stars.
What is a brighter star?
A star that is brighter than another.
What happens to the brightness of main sequence stars as they get hotter?
As they get hotter, they usually get brighter.
Is there a star that is hotter than the sun?
Yes, many stars are brighter than our sun. Deneb and Rigel are two examples. Rigel is over 100,000 times brighter than Sol.
