A tiny star is revealing the secrets of our galaxy's black hole
In short: Deep in the heart of the Milky Way, a star named S301 is performing a high-speed dance with a supermassive black hole. Traveling at 8% of light speed, it provides a rare laboratory to measure something scientists have struggled to see: the black hole's spin.
For years, astrophysicists have sought to define the fundamental properties of the supermassive black hole at the center of our galaxy. While mass is well-documented, determining a black hole's spin and charge remains significantly more difficult. Spin is particularly critical because it dictates how the black hole interacts with its surroundings, influencing the evolution of the entire host galaxy.
The discovery of star S301 changes this landscape. Despite being 2 billion times fainter than the brightest stars in our night sky, S301 occupies a unique position. It orbits so closely to the galactic center that it passes nearer to the black hole than Uranus does to the Sun. Remarkably, it is not being consumed or torn apart; instead, it maintains a stable orbit while traveling at 25,000 km/s.
By observing S301, researchers can utilize the Lense-Thirring effect—a phenomenon where a spinning massive object drags the fabric of spacetime along with it. Because S301 is so close to the source, its orbital behavior allows for a direct measurement of this rotation. This observation marks a pivotal shift from theoretical modeling to direct empirical evidence regarding the mechanics of our galaxy's central engine.
This research fits into a broader study of how supermassive black holes influence galactic development. Specifically, scientists like Dr. Becky Smethurst investigate whether energy output from the disk of material orbiting these giants can effectively halt a galaxy from forming new stars.
Opens the Intellect+ feed with this card first. Swipe up for the next one.
Sources
- Summary by Intellect · source: A star so close to the Milky Way’s black hole it feels its spin
To cite this card, link to https://intellectplus.co.uk/app/space-a-star-so-close-to-the-milky-way-s-black-hole-it-feels-its-s.
How we source, check and correct cards: Editorial standards.
General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.
Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?
Related
More in Astronomy · More in Space · Latest · A–Z · All topics
