Abstract
It is proposed that cold dark matter (CDM) consists of gravitationally interacting Planck mass particles. With the weakness of the gravitational interaction compensated by the large Planck mass m≅10−5g, it becomes possible to detect Planck mass particles by their classical gravitational scattering on small macroscopic particles provided the impact velocity is small. While Planck mass particles falling towards the sun are expected to have a velocity of ≅300kms, this would not be the case for by the gravitational field of the Earth entrapped Planck mass particles moving with same velocity as an earth satellite in the same orbit. For this reason, the collision of a Planck mass particle with a macroscopic particle in an Earth satellite might be detected by a small increment in the velocity of the macroscopic particle with the Mössbauer effect.
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