Links

Stellarium
A free planetarium software
http://www.stellarium.org/
Zip File containing the Carleton University Landscape files for Stellarium

Ottawa Clear Sky Chart
Forecast of atmospheric conditions for the next 48 hours
http://cleardarksky.com/c/Ottawakey.html

Space Weather
Current space related conditions
http://spaceweather.com/

Universe Today
Various space news
http://www.universetoday.com/

The Weather Network
Map of the cloud cover forecast for the next 6 hours
http://www.theweathernetwork.com/weather/maps/on_s/caon0512?ref=qlink_obs_radar

Impact Earth
Simulation of the effect of an asteroid impact on Earth
http://www.purdue.edu/impactearth

How to Avoid The Agony When Buying Your First Telescope
A good article about purchasing a telescope
http://www.cloudynights.com/item.php?item_id=2936

American Association of Variable Star Observers
Be involved in the measurement of the variability of stars
http://www.aavso.org/

The Hertzsprung-Russell Diagram Explorer
An online tool to simulate stars according to their HR diagram location
http://astro.unl.edu/naap/hr/animations/hr.html