100,000 Times More ‘Nomad Planets’ Than Stars?

An artistic rendition of a nomad object wandering the interstellar medium (intentionally blurry to represent uncertainty about whether it has an atmosphere). A nomadic object may be an icy body akin to an object found in the outer solar system, a more rocky material akin to asteroid, or even a gas giant similar in composition to the most massive solar system planets and exoplanets. (Credit: Greg Stewart/SLAC National Accelerator Laboratory)

Galaxy May Swarm With 100,000 Times More ‘Nomad Planets’ Than Stars -- Kurzweil

There may be 100,000 times more wandering “nomad planets” in the Milky Way than stars, and some may carry bacterial life, according to a new study by researchers at the Kavli Institute for Particle Astrophysics and Cosmology (KIPAC).

If any of these nomad planets are big enough to have a thick atmosphere, they could have trapped enough heat for bacterial life to exist,” said Louis Strigari, leader of the team that reported the result in a paper submitted to the Monthly Notices of the Royal Astronomical Society.

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