Space

Space is a layer appearing at the top of the world: ~950 feet and above, for large worlds. Gravity is decreased in Space, which means the player can jump higher, and will fall slower, similar to the Featherfall Potion effect. The sky is dark and stars are visible, even when the Sun is still up.

As with all high-altitude locations, Harpies and Wyverns will spawn. Fallen Stars spawn in this environment and can appear inside structures made at that altitude. The only naturally occuring materials in space are Floating Islands and – in small worlds – Living Trees.

Space seems to simply be a higher and thinner atmosphere layer, as air apparently still exists, so the breath meter does not appear.

As of the 1.2 update, the console exclusive Space Theme now plays on the PC. The theme can be recorded with a Music Box.

Ways of getting into space

 * Building a pillar of blocks. This method might be slow, but requires next to no preparation and materials - besides a lot of blocks, of course! It will make you very vulnerable to flying enemies such as Demon Eyes and Harpies, so it is recommended to bring a grappling hook to not loose your footing or easily "get back" to the pillar if you fall down. A pillar like this can be used to leave and re-enter (Climbing Claws+Shoe Spikes and their derivatives easily lets the player climb up) space.
 * Simply building straight up with a vast quantity of rope - this will also allow for a means of quickly sliding back down to earth, or back up to space again. Arguably a better alternative to a pillar as rope does not require any accessories, but won't interact with a grappling hook either.
 * Gravitation Potion
 * Various accessories intended for aerial movement. It is not guaranteed the player will reach space with them, but in conjunction with something that resets their usage, such as a Floating Island, they can be of great help. For players trying to reach space in order to acquire the Music Box (Space), a floating island will often be far up enough to feature this music.
 * The Shiny Red Balloon, "In a Bottle/Jar" (Cloud / Blizzard / Sandstorm / Fart), or their derivatives (especially the Bundle of Balloons).
 * Wings / Jetpack / Hoverboard
 * Rocket Boots and its derivatives.
 * An Ice Rod can be used to create short-lived ice blocks which the player can climb on. They can be placed in mid-air, which together with a grappling hook or aerial accessories allows for rapid ascension upwards. Powerful wings and an Ice Rod is possibly the fastest way of reaching space.
 * You can also easily visit space in ghost form with a deceased hardcore character.