When Robert Monroe was taken to a period in his travels to the Earth in the future, around3,000 AD, he was surprised to learn that the deep gray and brown bands/ rings were no longer around the planet.

• 当罗伯特·罗在他的旅行中被带至大约公元3，000年的地球的未来时，他惊讶地得知，环绕地球的深灰和褐色的环带不再存在。