James Webb Fishes Out an Invisible Planet from a Dusty Disk ⚡ экспресс
Using the James Webb Space Telescope, astronomers have discovered a third giant planet in the β Pictoris system—now the second system where more than two planets are directly visible. Surprisingly, the planet was found not in a regular image, but by picking out its spectral 'fingerprint' against the bright dusty disk (like recognizing a familiar tune in an orchestra’s din). The spectrum revealed methane, carbon monoxide, and water, and its motion suggests the planet is 'sweeping clean' the inner zone of the disk. Its mass is 2–4 Jupiter masses, and its distance from the star is over 30 astronomical units. This method opens the hunt for planets hidden in debris disks.
Using James Webb, astronomers 'fished out' a third giant planet from the murky dust disk of the star β Pictoris. Two others were already known, but this one was hiding in the bright light, like a fish in muddy water.
Regular imaging didn't help, so they used splitting light into colors: it revealed the fingerprints of water, methane, and carbon monoxide. It's like fishing by chemical 'scent': instead of casting a net blindly, they used a precise lure—a template of molecular lines.
The fished-out planet β Pic d is 2–4 times more massive than Jupiter and orbits far out—farther than Neptune is from the Sun. With its gravity, it scrapes out the inner edge of the dust disk, like raking silt. A year on it lasts over a hundred Earth years, and the method itself opens our eyes: searching for worlds where before we saw only murk.
🎯 A year on β Pic d lasts at least a century and a half: the planet is so distant that a single orbit takes over 100 Earth years.