Astronomy for amateurs
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The Crown and the Cushion

Descartes's Dog: Animals, Machines, and the Problem of Other Minds

#Life: The Wisdom of Philosophy, Psychology and Pop-culture for Living a Better Life

Discourse On Method, Meditations And Principles: Descartes : Discourse On Method (Everyman)

Be the Good: Becoming a Force for a Better World

Almagestum Novum: History of Astronomy

William Schaw Lindsay: Victorian Entrepreneur

The Mechanics of Progress: An explanation of what factors drive progress are and how they work together.

The Enlightenment and the Intellectual Foundations of Modern Culture

The Philosophers' Quarrel: Rousseau, Hume, and the Limits of Human Understanding

sourcingmap DC 3V 70mA 12000RPM Mobile Phone Coin Flat Vibrating Vibration Motor

• Product Name : DC Vibration Motor;Rated Voltage : DC 3V
• Speed : 12000RPM;Body Size : 10 x 3mm/ 0.4" x 0.1" (D*T)

ANGEEK 5PCS ULN2003 5V Stepper Motor + ULN2003 Driver Board for Arduino

• The stepper motor with a standard interface, can directly plug and easy to use.
• A, B, C, D four-phase LED indicates the status of the stepper motor work.

5Pcs Stepper Motor Driver Board,Stepper Motor Driver ULN2003 Stepper Motor Driver Board Module for 28BYJ-48 Stepper Motor

• ✿【ADVANCED CHIP】— Our Stepper Motor Driver Board is equipped with ULN2003A motor driver chip. High-quality driver chip.
• ✿【EASY TO CONNECT】— All pins of the chip are led out for easy connection. The onboard XH-5P socket can be directly connected to the 28BYJ-48 stepper motor.

Miagon PU Leather Case for Nothing Phone 1,Wallet Business Case Stand Flip Cover RFID Blocking Card Slots Magnetic Closure Spliced Case with Wrist Strap

• Please choose the right size of your device before purchase.Only Perfectly design for Nothing Phone 1
• This case will make your device match any occasions. Allows Easy access to all buttons, controls and ports

Explore Scientific 0456101 1 kg iEOX-100 Counterweight

• Item no. 456101

BRESSER Computer Cable for Remote Control of MCX Goto Telescopes and EXOS-II EQ Goto Mounts

• Telescope navigation via Windows 10 + 11 computer
• Positioning of the telescope per one click on the star map

Step Motor 28byj-48 Stepper Motor 5v Stepper Motor Driver

• Step motor driver: material: durable metal and plastic.
• 5v step motor: the 4 phase 5-wire stepper motor can be driven by ordinary uln2003 chip, and can also be connected in phase 2 development board used for supporting the use of a direct plug and easy to use stepper motor used in the development board.

12V Linear Electric Actuator 500mm,750N Electric Putter Motor,with Mounting Bracket,10mm/s Heavy Duty Multifunction Linear Actuator,for electric medical bed/sofa/stand lift rod

• LINEAR ACTUATOR:：Electric putter, also known as push rod motor, electric cylinder and linear actuator.You can increase the stroke by changing the lever arm length.Low noise design, noise level is ≤ 42dB.Inside set a stroke switch.Can be matched with wire or remote control.
• FEATURE:：The electric putter is an electric drive that converts the motor's rotational motion into a straight reciprocating motion of the push rod.Can be used in a variety of simple or complex process as the implementation of mechanical use, in order to achieve long-range control, centralized control or automatic control.

Universal Dovetail Base Fully Metal Finder Scope Mount Base Bracket Astronomy Accessories Optical Accessories Mounting Bracket Skywatcher

• Suitable for finder Scope, red-dot, pointers and guidscope.
• Universal size 1/4inch fit for different astronomical telescopes.

Hbaebdoo 6V 12V 24V 28V 3A 80W Motor Speed Controller (PWM) Speed Adjustable Reversible Switch 1203BB Motor Driver reversing

NEEWER 3X Barlow Len for 1.25" Telescope Eyepiece, Multi Coated Triple Magnification Telescope Lens Accessory, Fully Metal Build with M42 Thread to Connect to DSLR or SLR Camera, LS-T11

• 【Triple Magnification Barlow Lens】Designed to enhance the effective focal length of telescope eyepieces and therefore to magnify the image, the Barlow lens helps boost magnification for 1.25" eyepieces by 3 times and allows users to look more closely at planet surfaces with more details
• 【Great Optical Performance】The LS-T11 Barlow lens excels at delivering images of magnified view with great clarity. The fully multiple coated optics help keep the images sharp by minimizing reflections and boosting color contrast and saturation. There is no chromatic aberration

ASHATA Barlow Lens 5X,1.25 Inch Barlow Lens with M28.6 Threaded Interface,Microscope Auxiliary Objective Lens,for Astronomical Telescope Eyepieces

• 【High Definition】: Magnification barlow lens adopts high definition 5x magnification, helps you see clearer and farther.
• 【Excellent Performance】: The auxiliary objective lens features a broadband coated lens with excellent image contrast and light transmission.

Newwyt Rubber Eyepiece Cover for 36mm-43.5mm Ocular Lens Extender Eye Relief Distance Optics Cover Obliqued Hood Eyecups

• ❀ Durable, flexible, lightweight and soft rubber material.Made from Rubber with MultiFolds and an Ergonomic Obliques Eye Cup, Providing AmpleFlexibility as Comfortable Cushion and Protections.
• ❀ Extends over the eyeglass to provide a comfortable cushion fortheeye.

Barlow Lens, WD165 Auxiliary Objects Lens Microscope Camera Lens Barlow Glass Lens Telescope Eyepiece Accessories for Planetary Observation, 0.5X

• *Crystal Clear Images:Experience double the magnification of your original objectives with our practical and high-quality lens accessory.
• *Powerful Performance: Our objective lens significantly increases working distance, making it a great replacement for your old or broken lens.

Heallege Universal Metal Dovetail Base Mount Bracket Dovetail Plate 1/4 Slot Easy Installation Strong and Durable

• ❀Simple installation, small size, easy and convenient to use
• ❀Aluminium alloy and stainlesssteel material, CNCmachining, strong and durable

Length Extension Tube Kit Eliminating Excess Light Anodized Process M48X0.75 Variable Combination Astronomical Extension Tube Kit For Photography

• Variable Combination: The required spacing can be achieved by combining several extension rings of different lengths, you can use 1, 2, 3 or 8 extension rings as required.
• Aluminum Alloy Material: All metal structure and anodized aluminum process, durable, using this extension tube can obtain the correct image scale or the precise spacing required by the reducer or field flattener.

Bewinner Barlow Lens 2X, 0.965 Inch Fully Multi Coated Optical Barlow Lens, 24.5mm Metal Barlow Lens with FMC Green Film for Astronomical Telescope Eyepiece

• Applicability: Can be used with any astronomical telescope equipped with a 0.965in mount for wide field lunar observations; medium sized star clusters; and a wide range of cloudy nebulae and deep space targets.
• Coated Optical Lens: Provides high quality observation without additional chromatic aberration, making the image clearer and sharper.

60X Mobile Phone Microscope, High Definition Imaging, Versatile Lighting Options, Compact and Portable, Easy to Use for Currency Detecting, for Android and Ios Smartphones

• 60X Mobile Phone Microscope: The microscope supports up to 60X optical zoom, allowing you to observe finer details of plants, circuits, coins, stamps, and more.
• Easy to Use: Can be used for direct observation or attached to a smartphone for photography. Adjust the focus by rotating the zoom , making it simple and convenient to use.

Koanhinn Telescope Astronomy Focusing Mask Fixed Diameter 79-103Mm Monocular

• The Bahtinov Mask Made of acrylic. And it has whole process
• Perfect focusing for your CCD, DSLR or Webcam in seconds

Phone, Pocket Cell Phone with 6 LED Fill Light, Adjustable for Exploration, Observation, Circuit Board

• [EVA Spacer] If your phone camera head is raised, choose the right thickness of EVA spacer (2mm, 3mm, 4mm thickness) to stick on the innerof the , so that your phone camera head can be flush with the .
• [Application Phone Size] cell phone , compact size, for . With stretch , adaptable to cell phone models on the market, can be clamped size 66 to 96mm.

mdhsh 2pcs Soft Rubber Eyepiece Eye Shield 29-30mm Eye Guards Cups Eyepiece Covers For Binocular Microscope

• 100% brand new and high quality.
• Soft rubber, can be folded.

ATATMOUNT 2pcs Soft Rubber Eyepiece Eye Shield 29-30mm Eye Guards Cups Eyepiece Covers For Binocular Microscope

• 100% brand new and high quality.
• Soft rubber, can be folded.

vsilay Stylish Charm Girl Boy Earring Simple Ear Buckles Fashion for Cross Dangle Earring for Party School Travel Dating Shoppi

• Stainless steel,rust resistance and durable.
• Fashion and chic,will decorate your look greatly.

mayDONG Handsfree Magnifier 1.5X3X 7.5X9X 9.5X11X 15.5X17X LED HeadbandMagnifying Glass for Sewing Crafts Reading Jewelry

• Experience enhancedvision with our LED HeadbandMagnifier, perfect for intricatetasks and detailed work.
• Our upgraded headbandmagnifier features an adjustable strap and detachable lightsource, providing flexibility and convenience for various lighting conditions.

mdhsh 405nm Violet/Blue Laser Diode 3 Layers Collimating Coated Glass Focusing Lens

• Color: black
• Lens Material: glass

mdhsh Colorful Combiner Splitter Cross Dichroic Cube RGB Prism Optical Glass Triangular Prism for Teaching Light Spectrum Physics 20mm

• Can be used as teaching tools or research and decorations, they are very beautiful.
• Optical Glass RGB Prism, there are four lights, white light in any one of the illuminating surface intake, from the remaining three light shoot out three base colors of red, green and blue, respectively, is said three bases of the light.

Eujgoov WiFi Security Camera Mini WiFi Smart Security Camera 1080p HD Video Night Viewing Motion Detection Two Way Audio

• [Easy Setup and Use] Simply connect the camera to your WiFi network (supports 2.4GHz, not supports 5GHz) and use the APP to customize settings and access live video feeds.
• [Clear 1080P HD] Our WiFi security camera could catch highly clear video footage in 1080P resolution for detailed and sharply images.

mdhsh Red Dot Finder Scope Astronomy for 80EQ 80DX 90DX SE SLT Telescope Binoculars Monocular

• Simple, affordable, and effective red dot sighting device makes aiming your telescope
• Very easy to adjust. Thumbwheels allow positioning of the red dot horizontally and vertically for precise telescope alignment

dijiusidy Digital Illumination Meter Light Tester Outdoor Measure Gauge Illuminate Tools Humidity Temperature Sensor LCD Display

• With Backlight Display: LCD backlight display allows you to operate in the dark easily
• Multiple Functions: In addition to measuring visible light, it can also measure ambient humidity and temperature

Illuminance Meter, Light Meter, Digital Illuminator, Handheld Ambient Temperature Measuring Instrument, Ambient Light Sensor, Solar Power Detector,

• 100% brand new and high quality.
• Mini lux meter with stable, safe and reliable measurement.