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_42977 ( "U.S. mission" text, "Mass (kg)" real, "Booster" text, "Launched" text, "Mission goal" text, "Landing zone" text, "Lat / Lon" text )

### Question ###
What is the largest mass for Tycho Crater?

### Accurate SQL ###

SELECT MAX("Mass (kg)") FROM table_42977 WHERE "Landing zone" = 'tycho crater'