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ORBITER-FORUM will be temporarily closed at 2026-07-23 18:00 UTC while we complete some OF maintenance tasks. The amount of downtime is expected to take up to one hour, but probably less.
Sturtian glaciation (or several successive glaciations) that occurred in the first half of the Cryogenian period. Dates vary: either 717-643 million years ago, or 715-680 million years ago.
on the other hand, at the end of the period, the Ediacaran biota was formed - organisms that can be...
even the moon has a ring
"During the space missions of the Surveyor and Apollo spacecraft to the Moon, it was observed that sunlight is scattered in the terminator region, which in turn leads to the formation of lunar dawns and streamers above the surface (despite the absence of an atmosphere)...
Yes, it was only in 2018 that they were able to confirm the presence of a planet-sized dust cloud at an altitude of 400,000 km
https://academic.oup.com/mnras/article/480/4/5550/5089220
geodetic satellite GEOS-2 confirmed the picture, adding interesting details. It became clear that dust rings are located around the Earth at an altitude of 400 to 235 thousand kilometers. At the same time, the number of meteor particles noticeably decreases with distance from the planet's surface.
Earth's rings still exist today, but they are discharged
The Earth is surrounded by several rings, tilted differently to the plane of the equator and consisting of tiny, and therefore invisible, dust particles.
It was first recorded in 1966 by the first artificial satellite of the Moon, the...
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