Words, astronomers say they estimate there is 100 Billion like Earth's in the Milky Way galaxy.  Some of the plants are to hot.  A few are in the Habitable Zone.  There is a 17 billion Earth type planets in the Milky Way.  If a planet orbits a Red dwarf this means the sun is cooler.

Some of the puzzles that people list for the public get indexed by the search engines (like Google). Some people find those puzzles and cannot figure out how to make a puzzle of their own. So this page now has the navigation sidebar.

There are now buttons on the puzzle so that you can get a clean page, in either HTML or PDF, that you can use your browser's print button to print. The PDF format allows the web site to know how large a printer page is, and the fonts are scaled to fill the page. The PDF takes awhile to generate. Don't panic!