WD 1856 b, a Jupiter-sized world orbiting the remains of a Sun-like star, has piqued astronomers' curiosity. Using data from the James Webb Space Telescope (JWST), researchers have discovered that this planet’s transit across its white dwarf host is not as expected.
The brightness dip suggests an unusual grazing transit, where only the edge of WD 1856 b’s disk sweeps past the star. This is a rare and unexplained phenomenon, making the system even more enigmatic.
Contrary to expectations, this gas giant orbits extremely close to its white dwarf at just 0.02 AU—far closer than theory predicts. Typically, during a star's red-giant phase, inner planets are consumed, then outer planets should move outward due to the star's shrinking gravitational field.
The findings challenge our understanding of planetary systems post-star death and could offer insights into how planets migrate in such environments. It’s another cosmic puzzle for astronomers to solve.
