The LUNA experiment at the Gran Sasso Laboratory in Italy

The LUNA experiment is dedicated to measure low energy cross sections of reactions of astrophysical interest. Motivating these measurements with the question about the origin and the different abundances of isotopes in our universe, the reason to perform them in a deep underground laboratory is also mentioned. Using the example of the ²H(alpha, gamma)⁶Li reaction, the measurement approach and the apparatus are introduced.