Solar Flare     A solar flare may result in a coronal mass ejection (CME) of a billion tonnes that can travel at over 900 miles per second.  These can cause spectacular auroras to appear in the night sky, and may also trigger lightning activity.  In 1989 the Hydro-Quebec power grid was disrupted by a CME.  A very large CME aligned directly with Earth could end civilization as we know it. 


Astronomy seeks to answer some simple questions:

1. Where are we?
2. How did we get here?
3. Where are we going?
4. How long will that take?
5. What’s that thing over there?


American Association for the Advancement of Science

American Meteor Society

Astro Short Course 2013 Notes


Astronomy Course Graphics

Astronomy and World Heritage 


Big Chem, Honors Physics, Natural Philosophers, and Boomeria


Calendars on Star Date

Canadian Space Agency

Catalogue of Meteorites

Celestial Navigation (Henning Umland)

Celestial Navigation Data for Assumed Position and Time

Celestial Navigation Net

Celestial Navigation Primer

Changing Sun, Changing Climate


Cloudy Nights

Communicating Astronomy with the Public

Dark Sky Awareness

Earth Impact Database

Earth Impacts Effects Program

Extra Dimensions & Branes

Extrasolar Planets and Planet Formation

Hertzsprung-Russell Diagram

History of Scientific Cosmology

Human Impacts of Solar Storms and Space Weather

International Association of Geomagnetism and Aeronomy (IAGA)

International Comet Quarterly

International Meteor Organization

Isaac Newton Institute

Make a Dobsonian Telescope

Make a Galilean Telesccope

Make a Newtonian Telescope

Max Plank Institute for Solar System Research

Modeling the Universe

Moon Phases and Eclipses

Moon Watch

Near Earth Object Program

Nebraska Astronomy Applet Project 

Phobos Sample Return Project

Planetary Society

Radio Astronomy

Remote Sensing

Resources for Teaching High School Astronomy

Royal Astronomical Society of Canada

Satellites and Spacecraft


Skygazing: Astronomy through the seasons

Sloan Digital Sky Survey 

Space Telescope Science Institute   

Space Weather Prediction Center

Stanford Solar Center

Sunspot Cycle

Threat to Earth from Asteroids and Comets

Transit of Venus

Voyager:  The Interstellar Mission 



Water Day (a.k.a. Earth Day) is Every Day

This true-color image shows North and South America as they would appear from space 35,000 km (22,000 miles) above the Earth.


Higher Than the Sun (Primal Scream)