Astronomical Observations & Research


Visual binary systems as seen through my Tal-1 Newtonian reflector
(Computer generated drawings - place mouse over the image for descriptions)

Castor (Alpha Geminorum)

Primary members of the Castor system. Each of the three stars is itself a spectroscopic binary, making Castor an exciting 6 star system! [AA Institute]



Eta Cassiopeiae

The nearby binary Eta Cassiopeiae. Primary is Sun-like and yellow; the secondary appears reddish in larger telescopes. [AA Institute]



Almaak (Gamma Andromedae)

Primary members of the Almaak system. The fainter blue companion is itself a close binary, separable in large telescopes. [AA Institute]



Algieba (Gamma Leonis)

The colourful stars in the Gamma Leonis system. Primary is an orange star of spectrum K0 III, 60 times more luminous than the Sun. The secondary is deep yellow, G7 III, at least of 20x Sun in power output. [AA Institute]



Alnitak (Zeta Orionis)

The close binary Zeta Orionis - even at high magnifications, the two stars are only partially resolved. [AA Institute]



Zeta Cancri

The primary members (AB+C) of the triple star Zeta Cancri. The two yellow-orange stars seen here orbit each other every 1,150 years. Larger telescopes will split the primary into two separate stars (A+B). [AA Institute]
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