Shapes of the galaxy

Parallax demonstration

Principle of the aberration of light

Optical double principle

Mutual revolution of the components of a binary

Position of 61 Cygni

Position of Alpha Centauri, with Southern Cross

Great bear showing Mizar

Mizar through the telescope

Position angle

Electromagnetic spectrum

Production of a stellar spectrum

Diagram to show principle of a spectroscopic binary

Orion showing position of Betelgeux and surroundings area

Principle of extinction

HR diagram

Evolutionary tracks of stars according to modern theory

Position of Sirius

Proper motion Sirius

Orbit of Sirius B with dates

Size of Sirius B compared with Earth

Summer triangle area

Precessional movement of the north celestial pole

Position of Fomalhaut

Material associated with Beta Pictoris

Position of Beta Pictoris

Position of Algol

Light-curve of Algol

Chart of comparison stars for Algol

Position of Beta Lyrae

Light-curve of Beta Lyrae

Positions of Epsilon and Zeta Aurigae

Size of Epsilon Aurigae according to an early theory

Flattened disc theory of Epsilon Aurigae

Black hole theory of Epsilon Aurigae

Hack's theory of Epsilon Aurigae

Theory of Zeta Aurigae

Light-curve of Epsilon Aurigae during the last eclipse

Position of Mira

Light-curve of Mira

Fields of Mira:comparison stars

Position of Chi Cygni

Light-curve of Chi Cygni

Positions of Delta and Mu Cephei

Light-curve of Delta Cephei

Positions of Eta Aquilae

Instability strip on the HR diagram

Position of Kappa Pavonis

Position of the Crab Nebula M1

Development of a nova

Pulsar principle

Position of Eta Carinae

Light-curve of Eta Carinae

Position of SS433

Lawn-sprinkler theory of SS433

Position of the Pleiades

Diagram of the main stars in the Pleiades

Diagram of the Hyades

Position of the Orion Nebula

Impression of S Andromedae as it appeared in 1885 Position of M 31 the Andromeda Spiral

Production of a Type I supernova

Light-curves of Types I and II supernovae

SN 1986G position in Centaurus A with the dust-lane, etc.