Some of the main themes explained in this talk are:

• Distances in the universe
• Star brightness. Magnitude
• Stellar size and masses
• Solar spectrum. Spectroscopy
• Hertzprung-Russell diagram
• E=mc2
• Planetary nebulae

 This talk is part of the teachers training courses CESAR offer periodically in collaboration with other educative institutions.

There is more information about future courses in the EVENTS section.