How to board a rocket and travel to a space platform (Factorio Space Age)

In Factorio: Space Age you do not “sit in” a rocket like a car. You open a ready rocket silo, clear the cargo the game treats as inventory, and click Travel to space platform. This guide is for the official Space Age expansion—not the older Space Exploration mod.

If you already emptied your main inventory and the button is still greyed out, you are almost always missing a hidden slot (ammo or trash), a finished rocket, or a platform in orbit over the planet you are standing on. Hover the button: the tooltip usually names the exact blocker.

Board the rocket (quick steps)

1. Stand next to a rocket silo that has a completed rocket loaded (not still assembling rocket parts).

2. Confirm a space platform is in orbit above the planet you are on. You cannot board a platform parked over a different planet.

3. Open the silo UI.

4. Empty everything the silo counts as inventory (details below). Equipped power armor and guns can stay on your character.

5. When conditions are met, Travel to space platform becomes clickable. Click it to launch yourself to the platform.

If the button stays grey, hover it and read the tooltip before dumping more items at random.

What empty inventory really means

Space Age treats “empty for boarding” more strictly than “my main grid looks empty.” Clear all of these:

Main inventory grid — every stack gone.

Weapon ammo slots — magazines still loaded in your guns count. Empty the ammo row on each weapon, not only the main backpack.

Logistic trash slots — items waiting for bots to pick up still count. Open the character logistics UI and clear trash.

Blueprint strings in the inventory grid — move blueprints and books into the dedicated blueprint library (default key B / blueprint storage), not the main inventory.

Allowed to keep equipped:

Armor (including equipment grid modules already installed in the armor).

Guns and tools themselves — unload ammo; you do not need to unequip the weapons.

You are boarding as a passenger. Cargo for the platform still goes through normal rocket / hub logistics; this button is only about moving your character.

Still greyed out? Checklist

Work top to bottom:

Ammo you forgot

Open each gun and clear its ammo slot. Firearm magazines, piercing rounds, shotgun shells, and rocket ammo in a launcher are the usual culprits after a “I emptied everything” pass.

Trash slots still holding items

With personal logistics on, trash slots refill or retain junk silently. Clear them, pause requests if needed, and recheck the silo button.

No finished rocket in the silo

The silo must have a completed rocket ready to launch, not a half-built craft waiting on rocket parts. Finish the rocket, then reopen the UI.

No platform over this planet

The destination platform must be orbiting your current planet. A platform over Vulcanus cannot be boarded from a Nauvis silo. Park or send the platform first, wait until it shows in orbit here, then try again.

Auto-send / silo requests fighting you

Automatic rocket requests or auto-launch settings on the silo can make the UI feel “busy” or keep cargo flowing while you are trying to board. Temporarily disable auto behavior on that silo if the tooltip suggests cargo or configuration issues, board, then turn automation back on.

Read the tooltip

Hover Travel to space platform while it is disabled. Factorio’s tooltip is the authoritative list of remaining blockers—use it instead of guessing.

Space Age vs Space Exploration

This walkthrough is for Factorio 2.0 with the official Space Age expansion (rocket silo → Travel to space platform). The popular Space Exploration mod uses a different boarding / capsule flow. If your UI has no Travel to space platform button at all, confirm you own Space Age and that you are not looking at SE-specific machines.

FAQ

Can I take my power armor into space?

Yes. Keep power armor or MK2 equipped. Empty inventory and ammo; armor and its installed equipment stay with you.

Do I need to drop my guns?

No. Unequip ammo only. Guns can stay hotbar-equipped.

Why did the button appear then disappear?

Something re-entered a counted slot—often a trash-slot refill from logistics, or you picked up a magazine. Empty again and hover for the new reason.

I am on the platform—how do I return?

From the platform you travel back via the hub / drop controls to a surface with a cargo landing pad (or the planet’s drop rules you configured). Boarding the rocket is the surface → orbit step; landing is separate.

Ready for Vulcanus after this?

Once you can board reliably, pack the first trip properly. Use the First trip to Vulcanus packing guide before you treat the platform as a one-way tourist flight.

Related Beltworks guides

Continue with First trip to Vulcanus: what to bring, Foundry research stuck at 99% if metallurgy will not unlock, Finding Space Age and Factorio 2.0 blueprints for platform and silo layouts, and How to import a blueprint string into Factorio when you grab a pad or hub design from Beltworks.

Method and sources

Boarding rules match Space Age silo behavior documented by players who hit the same “inventory empty but button grey” traps: weapon ammo slots, logistic trash, blueprint storage vs main grid, a completed rocket, and a platform in local orbit. When stuck, the in-game hover tooltip on Travel to space platform is the source of truth.