The accelerated expansion of the universe does have implications for the measurement and calculation of distances to distant stars and galaxies. As the expansion continues, it affects the relationship between distance and the cosmological redshift of light from these objects.
The cosmological redshift is a phenomenon where the light emitted from distant objects gets stretched as space itself expands. It causes a shift of the light towards longer wavelengths, which is commonly interpreted as a Doppler shift due to the object moving away. The observed redshift can be used to estimate the distance to the object based on the assumption of the expanding universe.
However, with the accelerated expansion driven by dark energy, the relationship between the redshift and distance becomes more complex. The expansion rate of the universe is not constant, and it has been accelerating over time. This means that the relationship between redshift and distance is not linear but depends on the expansion history of the universe, as described by the cosmological model.
To calculate distances to distant stars and galaxies accurately in the context of the accelerating universe, cosmologists and astronomers utilize various techniques and models. These include the use of standard candles (objects with known intrinsic brightness) such as Type Ia supernovae or the cosmic microwave background radiation as a reference.
Recalculating distances to distant objects in light-years (ly) would still involve accounting for the effects of cosmic expansion, the redshift of light, and the relevant cosmological model. The distance measurements would need to incorporate the current understanding of the accelerating universe to provide accurate results.