Some 4.6 billion years ago, when the solar system was born from a vast cloud that collapsed to form the sun and a surrounding disk of whirling gas, no planets yet orbited our star. Back then, besides ...

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Meteorites preserve fragments of the earliest solid materials that formed around the young Sun. The Solar System began as a cloud of dust and gas called the solar nebula — the Sun formed at the centre ...

"For the first time, we have identified the earliest moment when planet formation is initiated around a star other than our sun." When you purchase through links on our site, we may earn an affiliate ...