O'Neill proposed the colonization of space for the 21st century, using materials extracted from the Moon and later from asteroids.
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At this scale, the air within the cylinder and the shell of the cylinder provide adequate shielding against cosmic rays.
The most prominent example of a starbase in Babylon 5 is the Babylon 5 station itself, as well as its four sister stations of the O'Neill cylinder configuration.
Eugene O'Neill | Sam Neill | Martin O'Neill | Tip O'Neill | O'Neill | Gerard K. O'Neill | Peter O'Neill | Paul O'Neill | Hugh O'Neill, Earl of Tyrone | Uí Néill | O'Neill dynasty | Michael O'Neill | Jennifer O'Neill | O'Neill, Nebraska | Kevin O'Neill | John O'Neill | Hugh O'Neill | cylinder | Susie O'Neill | Simon O'Neill | Seamus O'Neill | Phonograph cylinder | Felim O'Neill of Kinard | Ed O'Neill | Christopher O'Neill | Wedding of Princess Madeleine of Sweden and Christopher O'Neill | Tony O'Neill | Thomas P. O'Neill III | The Trials of Rosie O'Neill | Neill Calabro |