Because of different luminosities and distances from Earth, Stars have brightness defined as either:
A) Apparent Magnitude - [See Link]. As seen from Earth
B) Absolute Magnitude - [See Link]. Adjusted figures to a standard value.
NB: A Nova [See Link] is not really a star, just the process of a dying star.
Some white dwarfs are older than the sun, and some are not. More massive red dwarfs form from stars larger than the sun, which do not last as long.
Because luminosity is a measure of brightness over distance. Also white dwarfs are a hundred times smaller than the Sun. Most white dwarfs are a long way away and thus are difficult to see.
Darling, it’s all about size with these stellar babes! White dwarfs may be puny compared to supergiants, but they can shine pretty darn bright thanks to their intense temperature. So technically, yes, white dwarfs can be just as bright as those showy supergiants, it’s all about attitude in the cosmic catwalk, honey!
Most stars are dim red dwarfs which we cannot see. Most of the stars we can see actually ARE brighter than our sun. From our perspective, because we are so close to it, the sun appears big, the same reason a 100 watt light bulb in the same room appears brighter than stadium lights four miles away.
300,000,000,000,000 times brighter than the sun
Some white dwarfs are older than the sun, and some are not. More massive red dwarfs form from stars larger than the sun, which do not last as long.
Because luminosity is a measure of brightness over distance. Also white dwarfs are a hundred times smaller than the Sun. Most white dwarfs are a long way away and thus are difficult to see.
Darling, it’s all about size with these stellar babes! White dwarfs may be puny compared to supergiants, but they can shine pretty darn bright thanks to their intense temperature. So technically, yes, white dwarfs can be just as bright as those showy supergiants, it’s all about attitude in the cosmic catwalk, honey!
The Sun is brighter than both M-class stars (red dwarfs) and L-class stars (brown dwarfs). M-class stars are the most common type of stars in the universe but are dim compared to the Sun. L-class stars are even cooler and fainter, often not producing enough light to be seen without a telescope.
Most stars are dim red dwarfs which we cannot see. Most of the stars we can see actually ARE brighter than our sun. From our perspective, because we are so close to it, the sun appears big, the same reason a 100 watt light bulb in the same room appears brighter than stadium lights four miles away.
Dwarfs, such as white dwarfs or brown dwarfs, are small in size but can still be very bright because they have high temperatures that produce intense luminosity. The brightness of a dwarf is determined by its surface temperature, not its physical size. Therefore, even though dwarfs are smaller than the sun, their high temperatures allow them to emit significant amounts of light.
300,000,000,000,000 times brighter than the sun
Brighter Than the Sun was created on 2011-05-23.
Yes, in "absolute magnitude", Mizar is much brighter than the Sun.
Brightness is related to distance. However, from the same distance, an O class star is much much brighter than a M class star. As a comparison, an O class star would appear about 100,000 times brighter than our Sun, whereas a M class star could appear 0.0017 dimmer than our Sun, if the Sun was replaced with each star.
A white dwarf is much denser than the Sun. White dwarfs have a typical density around 1 million times greater than the density of the Sun, resulting in a mass similar to the Sun's but packed into a much smaller volume.
It is better to say that the sun appears brighter because it is closer. Some stars are actually brighter than the sun.