Rhea in front of Titan (Cassini)
Titan above Saturn's rings (Cassini)
Horsehead nebula (HST)
Saturn's moon Enceladus (Cassini)
Pluto topography (New Horizons)
Geysers on Enceladus (Cassini)
Nightscape (Mark Gee)
Flyby Pluto (New Horizons)
Carina Nebula (HST)
Crater slope on Mars (MRO)
Victoria crater on Mars (Erik Wernquist)
Titan and ring shadow (Cassini)
Carina Nebula in IR (HST)
Saturn closeup (Cassini)
Ligeia Mare on Titan (Cassini)
Mars weather (MRO)
Eta Carinae (Stephen Chadwick)
Aurora on Saturn (Cassini)
Jupiter (Juno)
Pluto mountains and plains (New Horizons)
Occam crater on Ceres (Dawn)
Earth and Moon from Saturn (Cassini)
Neptune's moon Triton (Voyager 2)
Saturn's moon Hyperion (Cassini)
The Nile at night (ISS)
Earth setting on Moon (Kaguya)
Jupiter and Ganymede (HST)
Jupiter (Juno)
Vela supernova remnant (Stephen Chadwick)
Sombrero galaxy (HST)
Sunset on Mars (Spirit rover)
Saturn's moon Epimetheus (Cassini)
Andromeda galaxy (Robert Gendler)
Helix nebula in IR (Vista)

Our EBooks

are embedded on this website and do not require anything else than the browser that you are using right now. EBooks are ideally suited for self-study.

All our EBooks have a linked Table of Contents and prev and next buttons for easy page navigation.

We are planning to soon include self-tests in our EBooks to help you to check your progress.

Click on the icon in the column "Run" in the table below to open the EBook in a separate tab.

 Our EBooks

Title Description Run
Click on icon in column Run The EBook will open in a separate tab
The Rhythmic Sky 3.0 This version is outdated, mainly because of the discontinuation of Flash. Use our lecture series The Rhythmic Sky which is up to date.  
A Sense of Scale 3.0 Building a scale model of the Universe, is that possible?  
Matariki 3.2 The heliacal rising of the open star cluster Pleiades and how that relates to the New Year celebrations of the New Zealand Māori  
Falling in Space 2.1 A primer in Orbital mechanics; How to travel from A to B in space.  
Stellar Radiation 2.1 The importance of EM-radiation for astronomy, absorption and emission lines, spectroscopy, HR-diagram.  
Stellar Evolution 3.0 How stars are formed, spend most of their lifetime and how they "die" and mapping of these processes on the HR-diagram. How are the chemical elements formed.  
Stellar Distance 4.0
There is no single technique to measure distance in the Universe. Astronomers use the term Cosmic Distance Ladder. We are going to climb that ladder.  
Magnitude & Distance 3.0 How distance to celestial objects can be obtained from the object's luminosity or magnitude. We discuss flux; magnitude scale; distance modulus; standard candles.  




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