Contemporary · United States
Andrea Ghez
Born 1965
Their story
Why Andrea Ghez matters
Ghez tracked stars orbiting an invisible, extremely massive object at the centre of our galaxy.
Andrea Ghez worked in United States during the Contemporary era. Today's researchers can combine powerful computers, international teams and extremely precise instruments, while also considering how discoveries affect society and the planet.
Questions in astronomy often require connecting small local observations with events happening across enormous distances or spans of time. Andrea Ghez helped make that connection measurable and understandable.
Key discovery or invention
Evidence for a supermassive black hole at the Milky Way's centre.
Andrea Ghez's central contribution was evidence for a supermassive black hole at the Milky Way's centre.
The discovery turned observations of the sky or Earth into evidence about a much larger system. Measurements, maps, specimens or mathematical models made changes across distance and time easier to recognise.
Why it still matters: Today's observatories, satellites, field surveys and computer models continue to ask larger versions of the same questions. Andrea Ghez's work is one chapter in that continuing story rather than the final word.
Her team uses adaptive optics to sharpen telescope images blurred by Earth's atmosphere.