Eposode 102: Warmer than expected

What does it mean?

Habitable zone – The region of space in a solar system that scientists believe would be suitable for life.

In human speak please!

In this episode, Alkina and Epo encounter a planet that lies on the very edge of the habitable zone, much as the planet Mars lies on the very edge of our own solar system’s habitable zone. Alkina expected that like Mars, the planet they encountered should have a surface temperature of around 200K (that’s about 73° Celsius below zero!). Instead Epo and Alkina find that the planet has a surface temperature of about 230K (about 43° Celsius below zero); which is still quite cold by Earth standards. Can you think of a process that could account for the unexpected increase in temperature?