My favourite astronomy sites:

http://stargazerslounge.com/ – Astronomy forum

http://www.astronomyshed.co.uk/forum/index.php – Astronomy forum

http://www.spaceweather.com/ – Current Sun, Aurora & Earth space weather developments

http://apod.nasa.gov/apod/astropix.html – NASA astronomy picture of the day

http://www.jb.man.ac.uk/astronomy/nightsky/ – Jodrell Bank current monthly sky review

http://www.telescopehouse.com/acatalog/Telescope-House-Monthly-Sky-Guide.html?utm_source=Telescope+House+Newsletter&utm_campaign=debea2f94c-June_Sky_Guide5_23_2014&utm_medium=email&utm_term=0_2ccd288edb-debea2f94c-29643229 – Telescope House monthly sky guide

http://flamsteed.info/ – Flamsteed Astronomy Society

https://www.ras.org.uk/ – Royal Astronomical Society

http://www.popastro.com/index.php – Society for Popular Astronomy

http://www.normanlockyer.com/ – Norman Lockyer Observatory

http://www.calsky.com/cs.cgi?obs=57697055659173 – CalSky astronomy planning & calculator

http://dso-browser.com/ – DSO-Browser; imaging planner

http://www.isstracker.com/home – International Space Station Live Tracking

http://iss.astroviewer.net/observation.php – International Space Station Forecast

http://curious.astro.cornell.edu/question.php?number=356 – Curious About Astronomy?

http://www.space-and-telescope.com/MessierObjects.aspx – Messier Catalogue

http://www.glyphweb.com/esky/default.htm – Sky maps and notes

http://www.atlasoftheuniverse.com/ – Does what is says on the tin!

https://www.timeanddate.com/moon/phases/uk/london – Moon phases for London

http://www.livecometdata.com/ – Real-time comet tracking data

http://www.minorplanetcenter.net/iau/MPEph/MPEph.html – Minor planet emphemeris service

http://astronomy.net/ – List of astronomy websites

http://www.stargazing.net/naa/scopemath.htm – Telescope Calculator

http://www.astropix.com/HTML/I_ASTROP/SOFTWARE.HTM – Software for Astrophotography

https://www.spacetelescope.org/ – Hubble Space Telescope / ESA

http://hubblesite.org/ – General NASA Hubble Site

http://www.12dstring.me.uk/fov.htm – Field of View Calculator (1)

http://www.newastro.com/book_new/camera_app.html – New CCD Astronomy

http://www.webbdeepsky.com/publications/free/ – Webb Deep Space Society

https://www.projectpluto.com/jeve_grs.htm – Great Red Spot Transit Times