The Milky Way’s neutral hydrogen (H i) disk is warped and flared^1,2. However, a dearth of accurate H i-based distances has thus far prevented the development of an accurate Galactic Disk model. Moreover, the extent to which our Galaxy’s stellar and gas disk morphologies are mutually consistent is also unclear. Classical Cepheids, primary distance indicators with distance accuracies of 3–5% (ref. ³), offer a unique opportunity to develop an intuitive and accurate three-dimensional picture. Here, we establish a robust Galactic Disk model based on 1,339 classical Cepheids. We provide strong evidence that the warp’s line of nodes is not oriented in the Galactic Centre–Sun direction. Instead, it subtends a mean angle of 17.5° ± 1° (formal) ± 3° (systematic) and exhibits a leading spiral pattern. Our Galaxy thus follows Briggs’ rule for spiral galaxies⁴, which suggests that the origin of the warp is associated with torques forced by the massive inner disk⁵. The stellar disk traced by Cepheids follows the gas disk in terms of their amplitudes; the stellar disk extends to at least 20 kpc (refs. ^6,7). This morphology provides a crucial, updated map for studies of the kinematics and archaeology of the Galactic Disk.

银河系的中性氢（H  i）盘弯曲并向外张开^1,2。然而，迄今为止，由于缺乏精确的基于H  i的距离，至今仍无法开发出精确的Galactic Disk模型。此外，我们银河系的恒星和气碟形态之间相互一致的程度还不清楚。古典造父变星，距离精度为3–5％的主要距离指示器（参考文献^3）），为开发直观，准确的三维图片提供了独特的机会。在这里，我们基于1339个经典造父变星建立了一个健壮的银盘模型。我们提供有力的证据表明，经线的结点线未对准银河系中心-太阳方向。相反，它的平均角度为17.5°±1°（正式）±3°（系统性），并呈现出领先的螺旋形。因此，我们的星系遵循布里格斯关于旋涡星系⁴的规则，这表明经线的起源与巨大内盘⁵施加的扭矩有关。造父变星追踪的恒星盘在振幅上跟随气体盘。恒星盘至少延伸到20 kpc（参考^6,7）。这种形态为研究银盘的运动学和考古学提供了至关重要的最新地图。