<text><span class="style10">he Sun and the Solar System (5 of 6)</span><span class="style7">The Solar System is generally thought to have formed 4600 million years ago by accretion (cumulative coming together) from the </span><span class="style26">solar nebula</span><span class="style7"> - a spinning cloud of gas and dust that also gave birth to the Sun. Gravity was the dominant force during the formation of the Solar System, and at some stage nuclei developed within the solar nebula that eventually accreted into the planets we now know. The fact that the planets all orbit the Sun in the same direction is thought to be a relic from the rotation of the original solar nebula.GE</span></text>
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<text>ΓÇó STARS AND GALAXIESΓÇó THE INNER PLANETSΓÇó THE OUTER PLANETS</text>