12-18 years
Craters
Planetary systems
There is more to astronomy than meets the eye
Experiments and exercises involving gravitational lenses
How do we know that the Universe is expanding?
Muons in the mountains
Eta Carinae: Reconstruction of major astronomical event
The age of Crab nebula
Distance and age of a star cluster
Cepheids and distance of galaxies
Let’s make a portrait of a galaxy
Travelling through Galaxy
About parallax…and constellations
Travelling through Galaxy: 3D models of constellations
Orion
Ranking the brightest stars of a constellation
Making a constellation slide
Brilliant stars on the screen by overhead projector
An estimate of the number of stars visible to photographs
Moon orbit
Didactical activities about tides
The shape of the Earth and the sky
Aristarcho’s proportio
Why are the eclipses dancing through the calendar?