planetary atmospheres

Noctilucent clouds are typically observed in summer, but in December 2024 these structures were seen in Siberia. IKI scientist Oleg Ugolnikov has studied this rare event. The paper was published on arXiv.org.

Scientists use the instruments onboard TGO (ESA/Roscosmos), Mars Express, and Venus Express (ESA) Martian orbiters to study the subtleties of the planet's atmospheric composition.

Having measured HCl and water ice abundance in Martian atmosphere with the ACS spectrometer onboard TGO mission, scientists showed that it is HCl uptake onto water ice cloud particles that can swiftly reduce the content of HCl in the atmosphere.

Indr Regio on Venus surface, studied in detail from orbit, seemed to be just several tens thousand years old.