Global telescopes act as one instrument

The publication presents astronomy as a product of exchange among Chinese, Indian, Persian, Greek, Arab and Central Asian traditions.

Scholars compared inherited tables and models rather than simply copying them, producing new observations and calculations.

Large instruments, repeated measurements, mathematical tables and trained observers depended on patronage and coordinated labour.

Astronomical development emerged through movement, multilingual scholarship and debate across connected regions.

The collaboration released a reconstructed radio image of the shadow of the black hole in M87.

The published image shows glowing material surrounding a dark central region.

The achievement required many researchers and observatories, not a single telescope.

The timeline places Babylonian eclipse tablets and Chinese sunspot reports before telescopic European solar research.

Under particular atmospheric conditions, large sunspots and unusual solar effects could be recorded without telescopes.

Historical reports extend the baseline for studying solar activity and its influence on Earth.