  Precision top mass measurements at hadron colliders have been notoriously
difficult. The fundamental challenge in the current approaches lies in
achieving simultaneously high top mass sensitivity and good theoretical
control. Inspired by the use of standard candles in cosmology, we overcome this
problem by showing that a single energy correlator-based observable can be
constructed that reflects the characteristic angular scales associated with
both the $W$-boson and top quark. This gives direct access to the dimensionless
quantity $m_{t}/m_{W}$, from which $m_{t}$ can be extracted in a well-defined
short-distance mass scheme as a function of the well-known $m_{W}$. A
Monte-Carlo-based study is performed to demonstrate the properties of our
observable and the statistical feasibility of its extraction from the Run 2 and
3 and High-Luminosity LHC data sets. The resulting $m_t$ has remarkably small
uncertainties from hadronization effects and is insensitive to the underlying
event and parton distribution functions.
  Our proposed observable provides a road map for a rich program to achieve a
top mass determination at the LHC with record precision.
