The Habitable Exoplanets Catalog
is a database of the planets outside our solar system which are considered the most suitable for life according to certain steps
. So far 16 have been identified
as possible candidates. This Guardian article
is a good introduction. You can also just dive into the catalogue, which ranks planets on two main scales, similarity to Earth
and surface habitability
(note that all images are computer renderings
). The catalog is a project of the Planetary Habitability Laboratory
at University of Puerto Rico in Arecibo (home to the world's largest radiotelescope).
The Worlds of David Darling.
British astronomer and science writer David Darling has written over 10,000 articles for three massive online efforts: the Encyclopedia of Astrobiology, Astronomy, and Spaceflight
, the Encyclopedia of Alternative Energy and Sustainable Living
, and a related encyclopedia of concept vehicles
. Though the diversity of entries can be eccentric, and some are quite short, the science seems solid: learn about the illicit corned beef sandwich
of Gus Grissom, peruse a comprehensive set of advanced space propulsion concepts
, and see a terrific illustrated listing of strange land and air vehicles
(don't miss the Peel P50
microcar and the Volvo Gravity Car
Water found on Jupiter moon
"After months and months of wrestling with the data ... we believe there is very strong evidence of a layer of melted water beneath Ganymede's icy surface," said Margaret Kivelson, a space physicist at the University of California, Los Angeles.