La Maison de l'Astronomie
La meilleure sélection d'instruments depuis plus de 30 ans au Québec – Montréal
59.95 $
These economical single axis (R.A.) DC motor drives are designed to compensate for the earth’s rotation. Their rotation speed matches the earth’s rotation rate for stars to appear stationary in telescope eyepieces. With the 9-volt alkaline battery (included) installed, it lasts up to 40 hours.
These economical single axis (R.A.) DC motor drives are designed to compensate for the earth’s rotation. Their rotation speed matches the earth’s rotation rate for stars to appear stationary in telescope eyepieces. With the 9-volt alkaline battery (included) installed, it lasts up to 40 hours.
Le Ciel du Mois par Claude Duplessis
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