Our year-end review features the “best of 2015” lists from Jason Davis, Casey Dreier, Emily Lakdawalla and Bill Nye the Science Guy. What’s Up offers planets, a comet, and a nice prize package for the space trivia contest.
- LightSail Program Wraps Busy Year with Test Readiness Review
- NASA’s Next Mars Mission Delayed for Two Years
- Planetary Radio Extra: Casey Dreier on the 2016 NASA Budget
- For the First Time Ever, a Curiosity Mastcam Self-Portrait from Mars
- Animated Film “The Looking Planet”
This week's question:
What is the orbital period (length of a year) for Sedna, the far distant object in a highly-elliptical orbit?
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 5th at 8am Pacific Time. Be sure to include your name and mailing address.
Last week's question:
What Apollo spacecraft was name Falcon? Give us the mission number and type of spacecraft.
The answer will be revealed next week.
Question from the week before:
What are the four worlds in our solar system that sand dunes have been discovered on?
The four worlds in our solar system known to have dunes are Venus, Earth, Mars and Titan. Arrakis and Jakku are not in our solar system.