CAPE CANAVERAL, Fla. — Astronomers have discovered the earliest seeds of rocky planets forming in the gas around a baby sun-like star, providing a precious peek into the dawn of our own solar system. It’s an unprecedented snapshot of “time zero,” scientists reported Wednesday, when new worlds begin to gel.

Astronomers first identified these minerals using the now-three-year-old James Webb Space Telescope. To see where exactly the signals were coming from, they studied the system with the ALAMA telescope, which is operated by the European Space Agency with international partners in Chile’s Atacama Desert.

For the first time, international researchers have pinpointed the moment when planets began to form around a star beyond the sun. Using the ALMA telescope, in which the European Southern Observatory (ESO) is a partner,