Title: The Sun chemical composition
Authors
Lorenzo OttavianoGiovanni Criscione
Francesco Cilia
Domenico Dimartino
Teacher: Giovanna Ragusa
School: Liceo Scientifico Enrico Fermi (Italy)
Title: Solar Diameter
Authors
Manuel Suárez FerreraAimar del Cristo Quintero
Raúl Suárez Cazorla
Aribén Elián Ramírez
Teacher: Eduardo Javier Perera Suárez
School: IES Guillermina Brito (Spain)
Title: HR Diagram in Perspective
Authors
Alexander Enzo AlmvangErling Skåre Vik-Mo
Darius SIllmann
Vetle Lie Løwe
Teacher: Anja Kleppan Engelsen
School: Norges Realfagsgymnas Ungdomsskole Bærum (Norway)
Title: The habitable zone
Authors
Georgios Ladas Polykarpos Lappas
Vasileios Kotsilas
Ioannis Pantelakis
Teacher: Anastasia Paloukou
School: 2nd High School of Gerakas Athens (Italy)
Title: The Sun as the centre of our planetary system
Authors
Alice NykielManuel Öhler
Felix Nessler
Julian Hessenberger
Teacher: Benjamin Wallner
School: Wiedner Gymnasium (Austria)