No; the surface temperature (if that's what you mean) can vary quite a lot, from perhaps 3000 kelvin for the coolest red dwarf stars, up to over a hundred thousand kelvin for the hottest stars.
Yes, they have roughly the same surface temperature. Internal temperatures may be very different depending on the respective stages of stellar evolution the stars are in.
Two stars of the same spectral class must have the same temperature and color. This classification system groups stars based on their temperature, with each spectral class representing a specific range of temperatures.
No. Red stars have the lowest surface temperatures while blue stars have the highest.
Cygnus is a constellation comprising 84 stars which appear in the Bayer Flamsteed lists. They are not all the same and cover a wide range of temperatures.
The temperatures of stars from hottest to coldest are blue stars, white stars, yellow stars (like our sun), orange stars, and red stars. Blue stars can have surface temperatures exceeding 30,000K, while red stars typically have surface temperatures around 3,000K.
The smallest stars in the main sequence are the stars with cooler surface temperatures.
Blue stars are hotter than white stars. Blue stars have surface temperatures ranging from 20,000 to 50,000 degrees Celsius, while white stars typically have temperatures around 7,500 to 10,000 degrees Celsius.
Class O stars are the hottest of stars with temperatures greater than 30,000oK
4 200*C
Red stars have the lowest surface temperatures.
Blue stars are hotter than white stars. Blue stars have surface temperatures ranging from 10,000 to 40,000 degrees Celsius, while white stars have temperatures in the range of 7,500 to 10,000 degrees Celsius.
Different sized stars burn at different temperatures. Different temperatures produce different colours. Stars that are moving away from us will shift their colours towards the red. This is called "Red shift".