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.
Amazon's Kindle Unlimited e-book subscription service, unveiled Friday, raised new questions about how much the company pays its army of self-published authors and the methods it uses to do so. Kindle Unlimited offers downloads on more than 600,000 e-books, as well as thousands of audiobooks, for $9.99 per month. But more than 500,000 of those titles are self-published works through Amazon's Kindle Direct Publishing Select program, according to industry newsletter Publishers Lunch.