WASHINGTON — The European Space Agency (ESA) is asking its member governments for 2.67 billion euros ($2.95 billion) to smooth the introduction of the Ariane 6 heavy-lift and Vega-C light-class rockets into a commercial market that otherwise would find it hard to accept the new rockets’ prices.

The new financing will offer many of the same subsidies, or cost offsets, that are provided to the current Ariane 5 vehicle, which is being phased out by 2022 to make way for the less-costly Ariane 6.

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