Mat Kaplan visits the Ad Astra Rocket Company in Texas where they are perfecting the VASIMIR electric rocket engine. Emily Lakdawalla has created a comprehensive timeline tracing missions throughout the solar system. Bill Nye salutes Planetary Society colleagues who gathered to record a Planetary Radio Extra year in review conversation. The new year’s sky is chock full of planets according to Bruce Betts.
- Ad Astra Rocket Company Documentary: “Crossing the Space Frontier”
- Ad Astra Rocket Company Audio Tour
- Ad Astra Rocket Company Photo Album
- Planetary Radio Extra: Planetary Society Experts 2015 Review
- Planetary Exploration Timelines: A Look Ahead to 2016
This week's question:
Hydrogen and helium are the most abundant elements in the Milky Way galaxy. What comes in a distant third by mass fraction?
To submit your answer:
Complete the contest entry form at http://planetary.org/radiocontest or write to us at email@example.com no later than Tuesday, January 12th at 8am Pacific Time. Be sure to include your name and mailing address.
Last week's question:
What is the orbital period (length of a year) for Sedna, the far distant object in a highly-elliptical orbit?
The answer will be revealed next week.
Question from the week before:
What Apollo spacecraft was name Falcon? Give us the mission number and type of spacecraft.
The Apollo 15 Lunar Module was named Falcon.