Space
Magnetic meteorites narrow down solar system’s birthdate
Magnetic fields in 4-billion-year-old rocks suggest the dust and gas cloud that spawned the solar system had gone by 3.8 million years after the sun formed
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Magnetic fields in 4-billion-year-old rocks suggest the dust and gas cloud that spawned the solar system had gone by 3.8 million years after the sun formed
The US space agency will send probes to metallic asteroid Psyche and the mysterious Trojans that flank Jupiter in the 2020s