Start with reading background information in the area you're interested in. Then do some preliminary searches in the article indexes and the library catalog.
Try searching some of the article indexes/databases or Summon (see the Key Resources box).
Try doing a keyword or subject search in the library catalog. Look for the tips in the second middle box for subject searching ideas.
Many bibliographic databases use strictly controlled terms to describe the subject content of materials. Being aware of these subject terms can help you focus your search with great precision. if you're not sure of the exact Library of Congress Subject Heading, use a Keyword search to locate a few items that are relevant to your topic. Then use the Subject Headings associated with those items to lead you to more relevant materials. Here are some examples.
For discussions of missions to specific areas:
For specific missions:
For the politics of space exploration:
Astronautics / Astronautics--United States / Astronautics and State / Astronautics and State--Soviet Union / Astronautics, Military / Space Industrialization / Space Stations--Government Policy / Space Tourism
For space exploration in general:
For biographical materials:
For the history of a topic: