Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_15944_5 ( engine_type VARCHAR, scenario VARCHAR )

### Question ###
What engine type is used in a Space Shuttle Vacuum scenario?

### Accurate SQL ###

SELECT engine_type FROM table_15944_5 WHERE scenario = "Space shuttle vacuum"