This week's question:

How many times was the Delta II rocket launched, including successes, failures and partial successes?

To submit your answer:

Complete the contest entry form at http://planetary.org/radiocontest or write to us at [email protected] no later than Wednesday, October 3rd at 8am Pacific Time. Be sure to include your name and mailing address.

Last week's question:

What is the tallest mountain on Ceres?

Answer:

The answer will be revealed next week.

Question from the September 12 space trivia contest question:

Time again to play Where in the Solar System? Where in the solar system is a crater named Math? (Sadly, unrelated to Mathew Kaplan.)

Answer:

A crater called Math is on Jupiter’s moon Europa.