IN BRIEF Orbital mechanics: study of the movements of objects in space. Satellite orbits: relationship between altitude and duration of presence in orbit. Kepler’s laws: foundations of observed planetary movements. Artificial satellite: human-made object orbiting a celestial body. Trajectories: key concept in spatial mechanics for calculating orbits. Types of satellites: varieties ranging from weather to … Read more
IN BRIEF Big Bang: cosmic event marking the origin of the Universe according to the current cosmological model. Origins of the Universe: study of the conditions preceding and following the Big Bang. Formation Eras: the Universe evolved through the radiation era, followed by the matter era. String Theory: suggests that the Big Bang could be … Read more
IN BRIEF Observable universe : Visible part of the universe, limited by the cosmic horizon. Size of the universe : Estimated to be at least 96 billion light-years. Cosmic horizon : Boundary beyond which the universe remains opaque. Cosmic microwave background : Light from the Big Bang visible at about 13.8 billion light-years. Expansion of … Read more
IN BRIEF K2-18b: possible shelter for extraterrestrial life. Habitable exoplanets: fewer than expected. Multiplication of discoveries of planetary systems. Importance of advanced telescopes in the research. Search for signs of life in the atmospheres of exoplanets. International collaboration to explore habitable planets. New strategies to detect extraterrestrial life. Reflection on the intellectual challenges of this … Read more
IN BRIEF The rover Curiosity discovered the presence of sulfates on Mars, indicating an environment conducive to life. Pure sulfur was identified for the first time, enriching our knowledge of the red planet. A study revealed fossil evidence of a cyclic climate, similar to that of Earth. Scientists discovered a volcano with an impressive height … Read more
IN BRIEF Dark matter: Makes up about 25% of the universe. Dark energy: Represents about 70% of the universe. Dark matter: Has an attractive virtue, promoting clumping. Dark energy: Has a repulsive virtue, pushing celestial objects away. 95% of the universe: Formed by dark matter and dark energy. Invisible: Cannot be detected by light. Persistent … Read more
IN BRIEF Spiral galaxies: grouping of hundreds of billions of stars Structure in the shape of a disk and central bulge Formed by the collapse of hydrogen and helium clouds Spiral arms influenced by giant molecular clouds Notable examples like the Milky Way and the Andromeda Galaxy Variety of shapes: spiral, elliptical, barred, and irregular … Read more