Variable red giants represent a fascinating class of stars whose light variability intrigues both astrophysicists and astronomy enthusiasts. These evolved stars, gigantic in size, undergo stellar pulsations that periodically modify their brightness and influence their internal dynamics. The complexity of these pulsations offers direct insight into the internal structure of stars and opens major perspectives … Read more
In the vast universe, measuring astronomical distances has been a major challenge since the beginnings of astrophysics. The variable stars known as cepheids have become fundamental keys for this task, acting as standard candles that allow us to estimate cosmic distances with precision. Their discovery and understanding have revolutionized our ability to map the universe, … Read more
IN SHORT Variable stars: celestial bodies that show variations in brightness. Two main types: Cepheids and RR Lyrae stars. Periodic volume variations affecting brightness and spectrum. Essential for estimating astronomical distances. Constantly increasing cataloging, with a variety of characteristics. Used to determine stellar dynamics. Long-period variable stars: red supergiants with marked brightness variations. Interest in … Read more