Navigation Along the Axes of the Multiverse: How We Find the Direction to a Neighbouring Universe

In the Infinite‑Dimensional Multiverse Model (IDM), our Universe is a 3‑dimensional brane embedded in a space with an infinite number of extra dimensions w_k . These axes have no projection into familiar 3‑dimensional space, so the “direction” to a neighbouring universe cannot be pointed at or measured with a telescope. This article proposes a navigational principle: motion along the w_k axis is equivalent to changing the fundamental constants of physics. Each axis is hypothesised to correspond to one constant (or a correlated set): w_1 — the fine‑structure constant α , w_2 — particle masses m_p , w_3 — the cosmological constant Λ , w_4 — the gravitational constant G , w_5 — the strong interaction constant α_s . Travelling from our Universe U_0 to a neighbouring universe A1,1 means smoothly changing α from our value (~1/137) to the value in A1,1 (e.g., 1/135). “Distance” is the difference in constants Δ α . The ship does not move in space; it stays in place in the coordinates x, y, z but “switches” the parameters of reality. Arrival is detected instrumentally when Δ α falls below a threshold (e.g., 10⁻⁶ ). With mature technology, the crew experiences no specific sensations thanks to an interference screen. For first missions, unpredictable effects may occur (analogous to the G‑forces experienced by early cosmonauts), the nature of which will be determined empirically. The article offers a physically grounded navigation principle for future inter‑universe expeditions.