Transziti

Transziti refers to transit events in astronomy—the passage of a body across the disk of another body from an observer’s viewpoint. The most widely studied transiti are planetary transits, where a planet passes in front of its host star and temporarily dims the star’s light. Transziti can also describe solar system transits, such as a planet or the Moon crossing the face of the Sun as seen from Earth.

Observationally, transziti are detected through precise photometry, producing characteristic light curves that show a small, temporary dip in brightness. The transit depth provides the planet–star radius ratio, approximately ΔF ≈ (Rp/R*)^2 for small planets, while the duration and timing reveal orbital period, geometry, and speed. Variations in transit timing can indicate additional planets or gravitational effects within the system. Transit spectroscopy, using observations at multiple wavelengths, can probe planetary atmospheres during the transit by analyzing the star’s light filtered through the planet’s atmosphere.

Transziti have driven major advances in exoplanet science. Space-based missions such as Kepler, CoRoT, and TESS have discovered thousands of exoplanets primarily through transit observations, enabling statistical studies of planetary populations and measurements of planetary radii. Ground-based surveys complement these findings, especially for brighter stars and longer-period planets. In addition to exoplanet research, historical transits, such as those of Venus and Mercury across the Sun, have contributed to solar system science and calibrations of astronomical distances.

See also: Transit method, Light curve, Exoplanet, Transit timing variation.