Astronomers may have discovered 1st exomoon beyond our solar system
Astronomers think they've spotted what could be the very first exomoon ever found outside our solar system.
That's a big deal, since we've already found thousands of exoplanets but never confirmed a single exomoon until now.
This possible moon is orbiting a Jupiter-like planet called HD 206893 B, about 133 light-years away from us.
How they found it and why it matters
Instead of the usual methods, researchers used high-precision astrometry—basically tracking tiny wobbles in a planet's position caused by orbiting objects.
Using the GRAVITY instrument in Chile, they picked up a signal that hints at something with about 0.4 times Jupiter's mass orbiting HD 206893 B.
If confirmed, this technique could open up new ways to discover more moons around distant worlds and cement astrometry as a promising tool for future exomoon searches.