PARIS — Four men and three women have signaled interest in becoming the next director-general of the 22-nation European Space Agency (ESA), representing seven nations and a mix of outsider and insider attributes.

ESA’s selection committee does not have a fixed deadline for making its recommendation for who will succeed Jan Woerner, whose truncated term ends in June. But a decision is expected by the end of this year.

If the committee is looking for a choice weighted toward making a statement, selecting a woman . . .

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