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We investigate the effect of the accelerated expansion of the Universe due toa cosmological constant, $\Lambda$, on the cosmic star formation rate. Weutilise hydrodynamical simulations from the EAGLE suite, comparing a$\Lambda$CDM Universe to an Einstein-de Sitter model with $\Lambda=0$. Despitethe differences in the rate of growth of structure, we find that dark energy,at its observed value, has negligible impact on star formation in the Universe.We study these effects beyond the present day by allowing the simulations torun forward into the future ($t>13.8$ Gyr). We show that the impact of$\Lambda$ becomes significant only when the Universe has already produced mostof its stellar mass, only decreasing the total co-moving density of stars everformed by ${\approx}15\%$. We develop a simple analytic model for the cosmicstar formation rate that captures the suppression due to a cosmologicalconstant. The main reason for the similarity between the models is thatfeedback from accreting black holes dramatically reduces the cosmic starformation at late times. Interestingly, simulations without feedback fromaccreting black holes predict an upturn in the cosmic star formation rate for$t>15$ Gyr due to the rejuvenation of massive ($ > 10^{11} \mathrm{M}_{\odot}$)galaxies. We briefly discuss the implication of the weak dependence of thecosmic star formation on $\Lambda$ in the context of the anthropic principle.

The impact of dark energy on galaxy formation. What does the future of our Universe hold?