To understand characteristics of micro-thruster, ground-experimental apparatus of bipropellant micro-thruster and data acquisition system were established.
And microscopic analysis indicates that some microsize mineral particles embedded friction surface, which make friction surface strengthened and recoverable.
The parallactic refraction between the stars and the satellite is small and well determinate, except for the irregular stellar movements known as erratics.
Take a lineage of microscopic marine animals known as bdelloid rotifers.Most rotifers reproduce sexually, but bdelloid rotifers abandoned sex about 100 million years ago.