In 2018, images were released of a planet being formed around the star PDS 70, offering a
tantalizing glimpse into how planets come into being. However, many questions remain …

The Knudsen pump (KP) is a kind of micro-pump that can form thermally induced flows
induced by temperature fields in rarefied gas environments. It has the advantages of having …

The inner part of protoplanetary disks can be threaded by strong magnetic fields. In
laboratory levitation experiments, we study how magnetic fields up to 7 mT influence the …

ABSTRACT A planetesimal moves through the gas of its protoplanetary disc where it
experiences a head wind. Though the ambient pressure is low, this wind can erode and …

Dust drifting inward in protoplanetary disks is subject to increasing temperatures. In
laboratory experiments, we tempered basaltic dust between 873 K and 1273 K and find that …

At low ambient pressure, temperature gradients in porous soil lead to a gas flow called
thermal creep. In this regard, Mars is unique as the conditions for thermal creep to occur in …

At the low atmospheric pressure on Mars, thermal creep within its soil is unavoidable. Soil is
a complex mixture of particles and pores and it is not clear a priori how to quantify such …

We carried out two types of drop tower experiments to quantify gas and particle motion
induced by temperature gradients inside a porous structure in a low pressure environment …