NASA | Zombie Fomalhaut b: Study of Hubble Data Revives a 'Dead' Exoplanet

Fomalhaut B, an exoplanet orbiting the star Fomalhaut, was initially observed in visible light and claimed as the first of its kind. However, its planetary status was questioned due to the failure to detect its heat. Recent analyses of Hubble images from 2004 and 2006 have reinstated Fomalhaut B as a planet, suggesting it is smaller than previously thought. The planet's movement aligns with the properties of the surrounding ring, indicating its presence. Further observations are expected to provide more insights.

What does the movement of Fomalhaut B suggest about its nature?

What implications does the failure to detect Fomalhaut B in infrared have?