Composition and distance.
The apparent brightness of a star is determined by its luminosity (true brightness), distance from Earth, and any intervening dust or gas that may absorb or scatter its light. These factors affect how bright a star appears in the night sky to an observer on Earth.
distance from the sun and the age of the star
It's Mass
How dense it is, and how far away it is.
Two factors that affect a star's apparent brightness are: 1.) The distance between the Earth and the star 2.) The absolute magnitude (the actual brightness) of the star Hope that helps :P
Distance from Earth, size of star, and temperature of star.
Distance from Earth, size of star, and temperature of star.
The mass of the host star.
Distance and intervenng or close celestial bodies
Distance and intervenng or close celestial bodies
Distance and intervenng or close celestial bodies
A star can appear to become brighter and dimmer on a regular basis if it is a variable star. Variable stars can pulsate, eclipse with another star, or vary in brightness due to other factors. By observing these fluctuations in brightness over time, astronomers can gain insights into the star's properties and behavior.