12-18 years

Solar eclipses : luminosity, temperature, area covered…

Solar eclipses : a “scale model”

Moon, phases and eclipses

Ring’Round the roses in the houses of the Sun

Elliptical Orbits

Rock Cycle

Solar System Science

Planet Tours

कठिनाई: ★ ★ ★

Saturn 

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Doppler effect and Saturn spectrum

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Roemer and the velocity of light

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From the Galilean Solar System to the detection of new minor bodies

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Second, metre and speed of light

Comets: very especial visitors

Determination of Jupiter’s mass

Kepler Laws. Experiments

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Galileo and the phases of Venus

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The orbit of Venus

Navigating the Night Sky

Equatorial Sundial

Light pollution, an introduction to astronomy/environmental education

Light pollution

Working before observations

Observation of variable stars

Determining longitude and latitude