Transit of Earth from Mars
A transit of Earth across the Sun as seen from Mars takes place when the planet Earth passes directly between the Sun and Mars, obscuring a small part of the Sun's disc for an observer on Mars. During a transit, Earth would be visible from Mars as a small black disc moving across the face of the Sun. They occur every 26, 79 and 100 years, and every ~1,000 years, there is an extra 53rd-year transit.
Earth and Moon transiting the Sun in 2084, as seen from Mars. This Image created using SpaceEngine
Earth and Moon from Mars, as photographed by the Mars Global Surveyor
In astronomy, a 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.
Transit of Venus as seen from Earth, 2012
Io transits across Jupiter as seen by Cassini spacecraft
The light curve shows the change in Luminosity of star as a result of transiting. The data was collected from the Kepler mission.