Exoplanète

Exoplanète is a term used to describe a planet that orbits a star outside of our solar system. These celestial bodies are also known as extrasolar planets. The discovery of exoplanets began in the early 1990s, and since then, thousands have been identified. Scientists are able to detect exoplanets through various methods, most commonly by observing the slight dimming of a star as a planet passes in front of it, a technique called the transit method. Another common method is the radial velocity method, which detects the gravitational wobble a planet induces on its host star.

The study of exoplanets is a rapidly evolving field in astronomy. Researchers aim to understand the diversity of planetary systems, the conditions under which planets form, and the potential for life beyond Earth. Exoplanets vary greatly in size, composition, and orbital characteristics. Some are gas giants similar to Jupiter, while others are rocky planets comparable to Earth, and some are in the "habitable zone" of their stars, where temperatures might allow for liquid water on the surface. The search for exoplanets is crucial for answering fundamental questions about our place in the universe and the prevalence of other worlds.