�y��vlog

Efficient cooling requires high reflectivity in the former range to minimise the solar heat gain and high emissivity in the latter range to maximise the radiative heat dissipation.

VERITAS, short for Venus Emissivity, Radio Science, InSAR, Topography & Spectroscopy, is to launch about a year before DAVINCI+.

Low-e, for “low emissivity,” refers to a microscopically thin coating of metallic particles that reflect some wavelengths of light while allowing most of the visible wavelengths to pass through.

The unpainted metal absorbs a significant amount of solar energy in the desert environment, and black paint would increase its ability to retain heat — or “emissivity” — by less than 10 percent, according to Rick Duncan, a materials engineer who works for trade associations and specializes in rooftop coatings.

The scales over the nonliving wing parts, which are not as easily damaged by heat, do not have such high “thermal emissivity.”