Ideology is the symbolic structuring the imaginary (both the constitution of the Other and its occlusion) as well as intervening in the real (we actually landed Perseverance on Mars). The Real shows up in contradictions between and within ideologies, and in the astronaut's traumatic realization that his world, both mediated and produced, is shaped by the signifier. So not all hope is lost as there is still freedom in the real and always will be. There is still a chance that we might dodge the bullet.
tl;dr The astronaut discovers his world is a signifier-produced reality, and in that traumatic Real there's still one off-switch: always has been, always will be...maybe
Yessir, it's only a few hours old, though😅 I have essentially no idea what I'm doing, but I grew impatient waiting for a more qualified user. "I alone cannot change the world, but I can cast a stone across the waters to create many ripples." –Mother Teresa