Larger craters can have terraces, central peaks, and multiple rings. Copernicus is a large crater (93 kilometers or 60 miles wide) on the Moon. The inner walls of the crater have collapsed to form a series of step-like terraces, and a central peak is visible in the center of the image. Apollo 17 image courtesy of NASA. A complex crater in the northern region of Mars.
Self-published authors could be paid as little as $0.006 per page read under new rules planned by Amazon. Writers who make their works available through Amazonâs Kindle Owners Lending Library, and a similar service called Kindle Unlimited, will no longer be paid per copy downloaded following a move announced last week.
In principle, Amazon's new plan gives readers more flexibility, enabling them to read as much as they like for a single low price. And for some people, it likely is a good deal. You can use the open-ended subscription of Kindle Unlimited to graze, browsing books until you find a book that really grabs your attention. There's no cost or penalty for reading a chapter or two and moving on to another title.