First, the books:

Neil F.Comins: What if the Moon Didn't Exist. Collection of some of Comins' articles from the Astronomy magazine, including speculation about planetary variants and the world seen through the "eyes" of other wavelengths.

Carl Sagan: Pale Blue Dot. Sort of a sequel to Cosmos, this book presents Sagan's ideas not only about planets and stars but about the human future in general.
(I also recommend his other book, The Demon-Haunted World, about a scientific worldview)

Ursa: Tähtitieteen Perusteet (English edition: Fundamental Astronomy, Springer-Verlag 1994). An university-level book about scientific astronomy

Stephen L.Gillett: World-Building: Writer's guide of how to create more or less scientifically accurate planets for hard science-fiction stories.

Then into what you have been waiting for: the relevant sites!

First clear the cobwabes out of your mind and check Bad Astronomy, for things you think you know but may be in grave error. Also includes articles about debunking of claims of Apollo Moon landing hoax and rumors about so-called planet X.

Encyclopedia Astronautica: Reference and also some current news.

Cambridge Institute of Astronomy

Spacefacts: Manned spaceflight data and portraits

ChView: A program with 3D map of the neighboring stars. Very extensive file has an every known star in 150 light years. Inspired by US SF writer C.J. Cherryh, hence the name

Extrasolar Planets Encyclopedia: In the recent years, astronomers have found many planets, usually jovians or superjovians, orbiting some of the nearby stars, at least one of them a neutron star. Information about these have been collected here (at least when it works...)

Nine Planets: Site about the planets of our own solar system. Those we at least know something about.

Space Daily: Up-to-date news about astronomy and space technology.

Ursa: The biggest astronomical society on Finland with lots of sub-branches. This link leads to a (short) English summary. Ursa publishes majority of the astronomy books in Finnish.

World Builders: This is a page for a university program of science where students practically build planets - includes short notes of astronomy, geology and biology and links to other relevant sites.

Even the artificial contraptions in the sky do not stand still, as you can check the position of some of them from here.

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Takaisin suomenkieliselle kotisivulle