Title
Observations Concerning the Planet Venus,Used
Delivery time: 8-12 business days (International)
In the early part of the eighteenth century, Francesco Bianchini of Verona turned his primitive telescope a refractor of only a few centimetres aperture but with an enormous focal length of around 20 metres on the planet Venus. He recorded some of the first telescopic observations of Venus, outstanding in terms of care and accuracy. Bianchini determined the parallax of the planet, estimated the period of rotation, and carefully mapped surface features (although we now know that only Venus' atmospheric clouds can be seen in visible light).Peter Fay and Sally Beaumont have translated this historic document into English, keeping as much as possible of the flavour and appearance of the original 1728 publication. As part of his research, Peter Fay constructed and tested a telescope similar to the one Bianchini had used. The results are given as an appendix to the text. Astronomers and historians alike will find this book fascinating. It is published by SpringerVerlag London to celebrate the launch of the Astronomy publishing programme in the UK.
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This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information, please visit www.P65Warnings.ca.gov.
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Shipping & Returns
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We ship your order within 2–3 business days for USA deliveries and 5–8 business days for international shipments. Once your package has been dispatched from our warehouse, you'll receive an email confirmation with a tracking number, allowing you to track the status of your delivery.
Returns
To facilitate a smooth return process, a Return Authorization (RA) Number is required for all returns. Returns without a valid RA number will be declined and may incur additional fees. You can request an RA number within 15 days of the original delivery date. For more details, please refer to our Return & Refund Policy page.
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Warranty
We provide a 2-year limited warranty, from the date of purchase for all our products.
If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
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