The Helios 1 and 2 spacecraft each carried two dust instruments to characterize the Zodiacal dust cloud inside the Earth’s orbit down to spacecraft positions 0.3 AU from the sun. The Zodiacal light in
Schematic view of the Helios spacecraft with the three photometers (P15, P30, and P90) of the Zodiacal light instrument and the two sensors of the Micrometeoroid analyzer. The hatched areas indicate the respective field of view.
Bottom view of the Helios spacecraft. The three Zodiacal light photometers P15, P30, P90 show the black openings of their stray light baffles. The drift tube of the South (S) micrometeoroid sensor is seen next to the photometers.
P30, one of the three small photometers making up the zodiacal light instrument. In operation, the light enters from upper right through the black Carbon fibre stray light suppressing baffle.
Display of the South and Ecliptic sensors and the common electronics box of the Helios Micrometeoroid Analyzer.
Space dust measurement refers to the study of small particles of extraterrestrial material, known as micrometeoroids or interplanetary dust particles, that are present in the Solar System. These parti
Small glassy lunar sample peppered with microcraters. The central pits are surrounded by bright spallation zones.
The 3 MeV dust accelerator facility at the Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder
Typical projectile size and speed performances of dust accelerators
Interplanetary dust flux measured by early dust detectors or derived from ground-based zodiacal light observations and analysis of lunar microcrater counts.