This week's question:

What are the Hayabusa2 five gram bullets made of? (Not the bigger copper projectile that will make a much bigger impact.)

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, March 13th at 8am Pacific Time. Be sure to include your name and mailing address.

Last week's question:

Where will the Hayabusa 2 return capsule land with its samples collected at asteroid Ryugu?

Answer:

The answer will be revealed next week.

Question from the February 20th space trivia contest question:

Of the five known dwarf planets, which is the only one not known to have a moon?

Answer:

Of the five dwarf planets in our solar system, only Ceres has no (natural) moon.