The observation of galactic γ lines following the decay of radioactive nuclei provides a direct link between nuclear physics experiments in earth-based laboratories and astrophysical observations with space-based observatories. Two examples are presented to illustrate this interplay: the measurement of the lifetime of 44Ti to allow an improved determination of the 44Ti mass of the supernova remnant Cassiopeia A from the observed γ ray activity and the measurements of excited states in 24Si to determine the reaction rate of 23Al(p, γ)24Si which might be important for a reduced production of 22Na in novae.
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