| Notes: | The 6 separately numbered diagrams included in the universe portion are designed with grids, measured in light years, to show progressively larger volumes of space entitled "Sun and near planets," "Sun's neighbors," "Milky Way Galaxy," "Local group," "Local supercluster," and "Known universe." Three of the 8 separately numbered ill. included in the sky survey portion are ill. and maps showing the orientation and location of sky survey photos. of part of the Orion Constellation; 2 of the ill. are reproductions of sky survey photos.; and 3 of the ill. are photographic enlargements of smaller areas covered by the sky photos., including the Horsehead Nebula.
Includes text.
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