Data Overlays

The familiar stick-figure lines that join a constellation's stars, drawn between the real stellar positions to make the ancient patterns legible on the star map.

A layer representing the all-sky astrometric coverage of the Gaia mission, whose measured positions and parallaxes underpin the modern star catalogue that the atlas draws.

A layer marking the positions of famous Hubble Space Telescope targets across the deep-sky map, from the Deep Fields to the great nebulae.

A layer marking the positions of objects observed by the James Webb Space Telescope, linking each region of the deep-sky map to the science it has enabled.

A layer showing which part of the sky is above the horizon for an observer at a given place and time. Computed from the observer's location and the clock — no observing conditions are assumed or invented, and location stays on the device.

A layer showing the angular field of view of a chosen telescope or instrument against the sky, so a target's real angular size can be compared with what an instrument can frame in a single pointing.