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The workings of our solar system are roughly the same now as they have been for millions of years. Moons circle their planets, the planets circle the sun, the sun’s magnetic fields and sunspots wax ...

Rather than slowly condensing over millions of years, the first building blocks of Earth and other planets may have formed ...

Planetary scientists have long debated where the material that formed Earth comes from. Despite its location in the inner solar system, they consider it likely that 6–40% of this material must have ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. Are planets in the solar system that are closer to the Sun older than the ones further away? – Gavriel, age 10, Paducah, Kentucky ...