Apollo mission lunar samples provided crucial data, initially intended to test existing Moon formation theories (capture, co-formation, fission), but ultimately leading to the development of the Giant ...

The standard theory of the origin of the Moon is called the giant impact hypothesis. It supposes that early in the Solar System’s history, a massive object smashed into the Earth, cleaving it into two ...

IN a new development of the fission theory of the origin of close binary stars 1,2, I showed that rotational instability would occur during the pre-main sequence contraction of rotating stars with no ...