Planetary Radio • Oct 06, 2015

Imaging Hot Young Jupiters

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On This Episode

Marchis franck

Franck Marchis

Senior Planetary Astronomer, SETI Institute & Chief Scientific Officer, Unistellar

Franck Marchis is on the team that has delivered an actual image of a young, hot world about 100 light years from Earth. We talk with him on the 20th anniversary of the first exoplanet discovery. Emily Lakdawalla reveals spectacular Charon, while Bill Nye and Mat Kaplan compare notes on “The Martian.” What’s a syzygy? Find out from Bruce Betts on What’s Up.

51 Eridani b (artist's conception)
51 Eridani b (artist's conception) Artist's rendering of the extrasolar planet 51 Eridani b, a "hot young Jupiter," in near-infrared light.Image: Danielle Futselaar & Franck Marchis, SETI Institute
51 Eridani b
51 Eridani b Discovery image of the extrasolar planet 51 Eridani b as seen in near-infrared light by the Gemini Planet Imager in Chile on December 14, 2014. The bright star at the center, 51 Eridani, has been masked as it is 1 million times brighter than the planet.Image: J. Rameau, University of Montreal / C. Marois, Herzberg Institute of Astrophysics

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This week's question:

As of 1980, how many planets had been orbited? And how many have been orbited by 2015?

To submit your answer:

Complete the contest entry form at or write to us at [email protected] no later than Tuesday, October 13th at 8am Pacific Time. Be sure to include your name and mailing address.

Last week's question:

Who was the only woman to perform a solo space flight?


The answer will be revealed next week.

Question from the week before:

What word generally refers to three celestial bodies in a line? (Bruce thinks it’s a funny word.)


Syzygy is a word for three celestial objects in a straight line.