How was the water on Earth formed 4.6 billion years ago?

4.6 billion years ago, as the solar system was forming, the Sun was growing, and the planets were accreting, water molecules were already present in the solar nebula from which the Sun and the planets formed. read more

The study pushes back the clock on the origin of Earth's water by hundreds of millions of years, to around 4.6 billion years ago, when all the worlds of the inner solar system were still forming. read more

Earth formed in this manner about 4.54 billion years ago (with an uncertainty of 1%) and was largely completed within 10–20 million years. The solar wind of the newly formed T Tauri star cleared out most of the material in the disk that had not already condensed into larger bodies. read more