An Unknown Object Has Been Keeping a 44-Minute Clock. Astronomers Just Found Out It Has Two Hands.
Long before anyone was watching, something 15,000 light-years from Earth established a rhythm. Every 44 minutes: a two-minute burst, then silence, then another burst. Precise as any clock humans have built, produced by something we have no adequate category for.
When astronomers classified ASKAP J1832-0911 as a long-period transient — a class of cosmic object identified only in 2022, with fewer than 10 examples known — the radio pulses alone were strange enough. Nothing in standard astrophysics explains why an object would pulse this slowly and this powerfully. Ordinary pulsars spin hundreds of times per second; even the slowest repeat in seconds, not minutes.
Then they found the X-rays.
NASA's Chandra Observatory, which covers only a narrow slice of the sky, happened to be trained on exactly this region at exactly the moment of the radio detection. In Chandra's data: X-ray pulses, synchronized precisely with the radio flashes. X-rays carry substantially more energy than radio waves. An object generating both simultaneously, in lockstep, is operating by physical rules we have not yet written down.
The leading explanations — a magnetar, or a binary system involving a magnetized white dwarf — are hypotheses, not answers. Both account for some of the data. Neither accounts for all of it.
The clock was running long before we arrived. What we have established, for now, is simply that it has two hands.
Read the full story at Earth.com, June 2, 2025
Hot Take: The models for this class of object were already thin; adding a second energy channel they don't account for is the universe's way of noting, without particular drama, that the models were thin.
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