Hubble Cloud Atlas

Cloud Atlas is a large Hubble Space Telescope Treasury program that is exploring the atmospheres and condensate clouds in directly imaged exoplanets, planetary-mass and more massive brown dwarfs, with typical temperatures between 800 and 1,700 K.

The program is using high-precision, time-resolved photometry and spectroscopy of these rotating objects to derive course maps of their cloud structures. By comparing the cloud maps between different objects we can determine how the cloud properties (covering fraction, cloud thickness, vertical structure) depend on the upper atmosphere’s temperature and the surface gravity of the objects.

The Hubble Cloud Atlas program is led by Dr. Daniel Apai and includes an international team of 14 researchers.