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
IN BRIEF Astrobiology: study of extraterrestrial life. Analysis of geochemical and biochemical factors conducive to life. Search for habitable exoplanets in the universe. History: from antiquity to the present, a continuous quest. Scientific challenges to detect life elsewhere. Impact of discoveries on our understanding of life on Earth. Astrobiology is a fascinating discipline that explores … Read more
IN BRIEF Main objectives: Exploration of the Moon, Jupiter, Mars, and beyond. Voyager 1: The farthest space probe that has transmitted data about interstellar space. Hubble: The first telescope to study the atmosphere of exoplanets. Galileo: A landmark mission around Jupiter, providing images and atmospheric data. Crucial discoveries: Identification of compounds such as sodium in … Read more