Ad Astra Oxygen, Gravity, and Space Suits

guide

Surviving off Earth in Ad Astra means managing oxygen, gravity and temperature. This guide covers the survival machines and the suits that keep you alive.

Space suits

Your suit is your life support. The standard space suit stores breathable oxygen; the Netherite Space Suit upgrades it with permanent fire resistance and more protection; and the Jet Suit adds still more protection, extra oxygen and flight, with an ascending mode and an elytra-like boosted mode. Check conditions before stepping out with the Ti-69, a handheld device that reads local oxygen, temperature and gravity.

Oxygen distribution

For a base rather than a suit, the oxygen distributor fills a sealed room with breathable air, drawing on an infinite water source through a water pump plus enough energy. The room must be completely sealed — the distributor's screen warns you when oxygen is leaking through a hole, and a breach in a pressurized room causes a rapid, dangerous depressurization. Add ventilation so closed doors do not block the flow.

Gravity and sealing

The gravity normalizer creates artificial gravity in a sealed area, with a slider to set the strength. Because cables are not solid, they will not seal a structure, so route them carefully around airtight rooms. Sliding doors are large three-by-three doors that seal oxygen when closed, making them ideal airlocks, and can be locked for security.

Oxygen has only two recipes, and that is the point

Oxygen Loading carries just 2 recipes, because the system is simple: water goes in, oxygen comes out, and it fills either a tank or the suit you are wearing. There is no oxygen tech tree to climb.

The complexity is in distribution rather than production. An Oxygen Distributor — four Fan, a Large Gas Tank, an Oxygen Loader, two Desh Plate and an Oxygen Gear — floods a sealed room so the helmet can come off indoors.

Suits are tiered with the rockets

The Netherite Space Suit takes four Ostrum Plate, two Large Gas Tank, an Oxygen Gear and a Netherite Chestplate, and it counts as both heat-resistant and freeze-resistant armour. The Jet Suit adds a Calorite Plate, Calorite Engine, Calorite Tank and an Etrionic Capacitor on top of it.

Ostrum gates the tier three rocket and the suit that makes tier three survivable — the metal is never only for the ship.

Where to find shelter

Eight structures generate across the mod's worlds, and the Oil Well is the densest at spacing 20. Pygro Village (24), Venus Bullet (27), Pygro Tower (29) and Lunarian Village (30) follow, with the Mars Temple rarest at spacing 40.