This device is dedicated to observe online how gravity influences, e.g., plant growth and the behavior of free-moving organisms. In collaboration with Nikon (Nikon, Düsseldorf, Germany), a confocal microscope (Nikon Eclipse 80i) was placed horizontally, equipped with a 360° pivotable microscope stage, objectives up to 100 fold and a scanning resolution of up to 2048×2048px. The applied laser wavelengths are 405nm, 488nm and 543 nm. After specific labelling of the sample, the in vivo analysis during gravitropic or gravitactic responses can be studied.