Enter Search Terms
Increase the accuracy of your search results by using additional syntax to focus your search. Enter a few descriptive words and select any of the following three options. By default all words are selected.

• All of the words: This option looks for search results that include all of the words you typed in the search box (Example: You want information about NASA Gemini Flights, Use this option to return results relevant to NASA Gemini and Flights).
  


• The exact phrase: This option searches for results that match the words exactly the way you enter them (Example: You're looking for : "Martian rocks").
  


• At least one of these words: This option searches for results that match either one or more of the words you require (Example: You want information on either Apollo or Pathfinder).
  

Without these words: This option excludes certain words from your search (Example: You're looking for information about "Solar System", but you don't want any information about comets. Enter Solar System as search term, select "All of the words", and enter comets in the "without these words" box).

Show pages where Search Term is: This option does a search on document Meta Tags (Example: you can find documents having the Search Term in its title, description or URL.

Only show pages of type: This option returns documents of the specified type (Example: You are interested only in Audio type documents).

Search pages within domain or site: This option does a search on the specific domain or site name (Example: You want to search for mars only in domain jpl.nasa.gov).

Only show pages updated in the: This option returns documents which were updated in the specified time frame (Example: You are interested in documents modified in last 3 months only).

Display Options
Here are some ways to organize your search results in the NASA Search Engine:

• Show Results per page: You can choose the number of results displayed per page.



• Display results: You can view search results with or without summary.



• Sort by: You can sort search results based on Relevance, Date or Title.

Search Tips: