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Stories about: solar nebula

Solar Nebula Homogeneity Contested According to solar system formation theory, the Sun and the planets all emerged from a homogeneous cloud of dust and gas, called the solar nebula, which collapsed on itself about 5 billion years ago. Chondritic meteorites are believed to be among the first objects that were formed in the solar nebula, some of which b... 29 April 2008 04:28 GMT A Little Solar System History: Switch Uranus with Neptune The configuration of the solar system as observed today poses some serious questions about how the planets might have evolved from the protoplanetary disk spinning around the Sun, as current models cannot yet explain how a planet the size of Jupiter could have formed in only a few million years, while predictions reg... 12 December 2007 04:40 GMT