Assertion: telescope's mirror | /r/HasProperty | primary
Facets:
value: usually
type: DEGREE
Source sentences:
text: The Extremely Large Telescope (ELT) will have a primary mirror made up of almost 800 individual segments and will be capable of collecting more light than all of the existing 8-to-10-meter telescopes on the planet, combined.
text: Invented in the 1960s, it has a secondary mirror that bounces light through a hole in the primary mirror to an eyepiece.
text: The name active optics means that the system keeps a mirror (usually the primary) in its optimal shape against environmental forces such as wind, sag, thermal expansion, and telescope axis deformation.
text: A reflector telescope gathers light at its bottom using a concave mirror called the "primary.
text: The light enters the tube and reflects off a curved mirror (called the primary mirror) at the other end, before bouncing back up the tube to near the top where it reflects off a smaller mirror (called the secondary mirror), which bounces the light out of a hole in the side of the telescope where you attach your eyepiece.
text: The light enters the tube and reflects off a curved mirror (called the primary mirror) at the other end, before bouncing back up the tube to near the top where it reflects off a smaller mirror (called the secondary mirror), which bounces the light out of a hole in the side of the telescope where you attach your eyepiece.
text: A mirror (referred to as the primary mirror) is placed in the bottom of the telescope and reflects the image back toward the top.
text: Orion telescopes that have a collimation cap included also have a primary mirror that is marked with a circle at its exact center.
text: The Subaru Telescope has a primary mirror over 8 meters in diameter.
text: Some telescopes use primary mirrors which are made differently.
text: It used a primary mirror at the back of the telescope with a glass corrector plate in the front of the telescope, which was designed to remove spherical aberration.
text: Telescopes are made up of primary and secondary mirrors.
text: Most telescopes within the field of amateur astronomy are considered to be small, ranging in general from 2-inch (50 mm) achromatic refracting types, to reflecting telescopes featuring primary mirrors up to 36 inches (910 mm) or more in diameter.
text: The telescope has a primary mirror that is 2.4 meters in diameter (7.9 feet), and is the same size as the Hubble Space Telescope's primary mirror.
text: The focal ratio of a telescope is derived from dividing its focal length (how long the telescope is) by the width of its largest optical element (either its lens for a refractor or its primary mirror for a reflector).
text: NASA recently released a video of the telescope fully deploying its primary mirror into the same configuration it will have when in space:
text: The typical Schmidt-Cassegrain telescope focuses its image by allowing the user to move its primary mirror slightly forward or backward along the optical axis, using a simple mechanical mechanism and knob.
text: Ultraviolet telescopes have primary mirrors which are coated with special materials that make it possible to reflect ultraviolet light.
text: Telescopes are made up of primary and secondary mirrors.