Astronomy Picture of the Day 📸 24 September 2025 📅
"GW250114: Rotating Black Holes Collide"
GW250114 was the most powerful gravitational wave signal ever recorded. Detected earlier this year by both LIGO observatories in Washington and Louisiana, it revealed the merger of two black holes—each about 33 times the Sun’s mass—into a single black hole roughly 63 solar masses. Despite occurring a billion light-years away, the signal was so clear that scientists precisely measured the spin of the black holes and the initial vibrations of the final one. The event also confirmed a key prediction: the total event horizon area of the resulting black hole is larger than the combined areas of the originals. An artist’s illustration imagines the view near one of the black holes just before the collision.
Casper Astronomy
Astronomy Picture of the Day 📸 24 September 2025 📅
"GW250114: Rotating Black Holes Collide"
GW250114 was the most powerful gravitational wave signal ever recorded. Detected earlier this year by both LIGO observatories in Washington and Louisiana, it revealed the merger of two black holes—each about 33 times the Sun’s mass—into a single black hole roughly 63 solar masses. Despite occurring a billion light-years away, the signal was so clear that scientists precisely measured the spin of the black holes and the initial vibrations of the final one. The event also confirmed a key prediction: the total event horizon area of the resulting black hole is larger than the combined areas of the originals. An artist’s illustration imagines the view near one of the black holes just before the collision.
Image Credit & Copyright: Aurore Simonnet (SSU/EdEon), LVK, URI; LIGO Collaboration
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