12-18 năm

Solar eclipses : luminosity, temperature, area covered…

Sự khó khăn: ★ ★

Solar eclipses : a “scale model”

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Moon, phases and eclipses

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Ring’Round the roses in the houses of the Sun

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Elliptical Orbits

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Rock Cycle

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Solar System Science

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Planet Tours

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Saturn 

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Doppler effect and Saturn spectrum

Sự khó khăn: ★ ★ ★

Roemer and the velocity of light

Sự khó khăn: ★ ★ ★

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

Sự khó khăn: ★ ★ ★

Second, metre and speed of light

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Comets: very especial visitors

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Determination of Jupiter’s mass

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Kepler Laws. Experiments

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Galileo and the phases of Venus

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The orbit of Venus

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Navigating the Night Sky

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Equatorial Sundial

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Light pollution, an introduction to astronomy/environmental education

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Light pollution

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Working before observations

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Observation of variable stars

Sự khó khăn: ★

Determining longitude and latitude

Sự khó khăn: ★