VISUAL ARCHIVE / IMAGE STORY
The Instruments Behind the Orbit
Interferometry turns light from several telescopes into precise astrometry.
Artist’s reconstruction inspired by the four Unit Telescopes at ESO’s Paranal Observatory. The VLTI combines their light, and GRAVITY observations made S301’s orbit accessible. AI-generated illustration; this is not a documentary photograph.
THE OBSERVATION
What we can actually see.
GRAVITY at ESO’s Very Large Telescope Interferometer measures the relative positions of faint stars in the Galactic Center. That precision allowed the team to build an orbital fit for S301 from repeated observations.
THE ILLUSTRATION
What the artwork imagines.
The picturesque observatory and perfectly timed beam paths are a studio reconstruction, not documentation of the exposure that yielded a particular orbital point.
FROM THE ILLUSTRATED ARTICLE
The story that inspired it.
The article follows S301’s observed orbit and the future prospect of measuring Sagittarius A* spin from repeated passages. Interferometry turns light from several telescopes into precise astrometry.
Read The Star Our Black Hole KeptCHECK THE RECORD
The image interprets the research below. Follow the original work for the measurements and limits behind the scene.
ESO: S301 discovery and observationsOTHER IMAGE STORIES
S301 at the Edge of Strong Gravity
The Companion We Have Not Found
The Mark Shared by Titan and Pluto