After seeing First Man, it’s doubtful you’ll think about space flight, or Armstrong’s historic walk, in quite the same way. You’ll know more deeply how it happened, what it meant and what it was, and why its mystery — more than ever — still lingers.

In its tragic undertones, complex psychological edifice, and claustrophobic visuals, First Man stands out, in both content and form, as a remarkable, jaw-dropping departure from anything Chazelle has previously made.

It’s a credit to the filmmakers and to lead actor Ryan Gosling’s thoughtfully internalized performance as Neil Armstrong that this sober, contemplative picture has emotional involvement, visceral tension, and yes, even suspense, in addition to stunning technical craft.

Overall, it’s an impressively mounted film, from the seamless visual effects to the score by Justin Hurwitz, which is flexible enough to accentuate both the film’s tension and its earthbound humanity, to the always exquisite editing by Tom Cross (“Whiplash”), which plays a key role in establishing the characters, the stakes and even the passage of time.

Steering an astonishingly accomplished path between the small steps and the giant leaps of the Apollo 11 mission, reigning Best Director Damien Chazelle opens the 75th Venice Film Festival with First Man, an immersive, immaculately crafted, often spectacular and satisfyingly old-fashioned epic that may well become the definitive moon-landing movie.