A stealth startup led by ex-Blue Origin leaders, focused on harvesting resources from the moon, has quietly closed a sizable new tranche of funding, according to regulatory documents. Interlune, a startup that’s been around for at least three years but has made almost zero public announcements about its tech, has raised $15.5 million in new funding and aims to close another $2 million. A representative for Interlune declined to comment on this story.