3 citations · 13 across the 15 of their papers we have counts for
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Venus transits: history and opportunities for planetary, solar and gravitational physics
Costantino Sigismondi, Xiaofan Wang, Patrick Rocher +1
The data of 2012 transit of Venus are compared with the ones of 2004. The thickness of the atmosphere of Venus, its aureole and the effect of oblateness and other asphericities in…
Solar diameter, eclipses and transits: the importance of ground-based observations
Costantino Sigismondi
The lifetime of a satellite is limited, and its calibration may be not stable, it is necessary to continue ground-based measures of the solar diameter with methods less affected by…
Measuring the Earth-Sun distance during a lunar eclipse
Costantino Sigismondi
The classical method for measure the Earth-Sun distance is due to Aristarchus and it is based upon the measure of the angle Moon-Earth-Sun when the Moon is exactly in quadrature. S…
Introduction to pinhole astronomy
Costantino Sigismondi
The observation of the Sun with a pinhole in order to check the first and the second Kepler's law has been realized for high school students. The settling of the experiment in orde…
Variable stars magnitudes estimations exploiting the eye physiology
Costantino Sigismondi
The physiology of the dark adaption process of the eye is revisited from an astronomical point of view. A new method for the magnitude estimation of a star is presented. It is base…
Astronomy in the Church: the Clementine Sundial in Santa Maria degli Angeli, Rome
Costantino Sigismondi
Pope Clement XI (1700-1721) ordered Francesco Bianchini (1662-1729) to build a Meridian Line. Bianchini was the Secretary of the Commission for the Calendar. He chose the Basilica…