astronomical transit
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An astronomical transit occurs when a celestial body passes directly between a larger body and the observer, creating a distinctive alignment in the sky. Transits matter because they allow astronomers to study the properties of distant objects, such as detecting exoplanets around other stars or measuring the size and composition of celestial bodies.
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Phobos transits the Sun, as viewed by the Perseverance rover on 2 April 2022
In astronomy, a transit (or astronomical transit) is the passage of a celestial body directly between a larger body and the observer. As viewed from a particular vantage point, the transiting body appears to move across the face of the larger body, covering a small portion of it.