A star is tracked through a complete close approach to the Galactic centre

Assembled from 25 blocks · 1 evidence · 16 related

1. Story
2. Infrared monitoring resolved the orbit of the star S2 around the compact radio source Sagittarius A*, including its 2002 pericentre passage, establishing a period of about sixteen years and confining a mass of some millions of suns within a volume small enough to exclude every alternative except a black hole - a dense star cluster of that compactness would not be dynamically stable. It is the measurement that made the Galactic centre black hole the best-established case anywhere.
3. Knowledge
4. Sagittarius A* - the black hole at the centre of the Milky Way
5. S2 - the star that measured the Galactic centre
6. A star is tracked through a complete close approach to the Galactic centre
7. Connections
8. S2 - the star that measured the Galactic centre
9. Sagittarius A* - the black hole at the centre of the Milky Way
10. Sagittarius A* - the black hole at the centre of the Milky Way
11. A star is tracked through a complete close approach to the Galactic centre
12. S2 passes pericentre and its light is measurably redshifted
13. The orbit of S2 is shown to precess as general relativity predicts
14. The Nobel Prize in Physics recognises black holes twice over
15. The black hole at the centre of our own galaxy is imaged
16. M87* - the supermassive black hole in Messier 87
17. S2 - the star that measured the Galactic centre
18. A star is tracked through a complete close approach to the Galactic centre
19. The Event Horizon Telescope observes M87* and Sagittarius A*
20. S2 passes pericentre and its light is measurably redshifted
21. The orbit of S2 is shown to precess as general relativity predicts
22. The Nobel Prize in Physics recognises black holes twice over
23. The black hole at the centre of our own galaxy is imaged
24. Evidence
25. Reports a complete stellar orbit around the Galactic centre compact source, constraining the enclosed mass within the pericentre distance. V55 VERIFICATION BASIS: not consulted in session; no research tool was available. Title, volume and page are from recall and must be checked; the period is quoted slightly differently in later analyses.