Cooling Fan The New Skyline PLUS Retractable 10", 12", and 16" telescopes are equipped with a cooling fan (10, Diagram 3) on the primary mirror cell. Use the fan if the telescope has been exposed …

Internationally, the optical telescope assembly (OTA) is usually used to describe the weight of the main mirror. The surface density of a single sub-mirror of the main mirror in the James Webb Telescope is …

The tracker is supported by the telescope structure at the nominal position of half the radius of curvature of the primary mirror. The telescope structure supports all the interfaces of the tracker to the rest of …

Jan 27, 2026 · Unlock the secrets of optics! Compare the differences, image formation rules, and real-world uses of the convex lens and concave mirror. Start learning now!

2 days ago · Abstract Ground-based imaging atmospheric Cherenkov telescopes (IACT) with a single reflector are used to study cosmic gamma-ray sources. These telescopes capture images of …

Convex mirrors A convex mirror diagram showing the focus, focal length, centre of curvature, principal axis, etc. A convex mirror or diverging mirror is a curved mirror in which the reflective surface bulges …

Attached to the frame are the "horizon mirror", an index arm which moves the index mirror, a sighting telescope, Sun shades, a graduated scale and a micrometer drum gauge for accurate …

Liquid-mirror telescopes are telescopes with mirrors made with a reflective liquid. The most common liquid used is mercury, but other liquids will work as well (for example, low-melting point alloys of …