Astronomers have discovered planet-forming "pebbles" around two young stars, DG Tau and HL Tau, about 450 light-years away, according to a Royal Astronomical Society study. These pebbles are believed to gradually merge and form planets, similar to Jupiter's formation 4.5 billion years ago. Researchers used e‑MERLIN, an interferometer array of seven radio telescopes spanning 217 km across the UK.