תמסורת רגילה

An adjective meaning “centered on the Earth.” Most early civilizations had a geocentric view of the universe

Spherical grouping of hundreds of thousands of stars. Globular clusters are composed of older stars,
and are usually found around the central regions of a galaxy.

A star that a telescopes guidance system locks onto to ensure that a celestial object is followed and observed as the telescope moves. The telescope uses one of its sensors to detect and lock onto a guide star.

The Hertzsprung-Russell (HR) Color-Magnitude Diagram, is a graph upon which stars are plotted by spectral type and actual luminosity. It is named for the two scientists Russell and Hertzsprung who first used it in 1913.

הגדלה מרבית אפקטיבית

Radiation that has longer wavelengths and lower frequencies and energies than visible light

כושר איסוף האור של הטלסקופ

A unit of distance, mainly used in the astronomy field. The distance light travels in a year, at the rate of 300,000 kilometers per second (671 million miles per hour). One light-year is equivalent to about 5,880,000,000,000 miles or 63,240 AU.

הכוכב החיוור ביותר הניתן לצפייה ישירה דרך הטלסקופ. ראה מאמר בנושא "בהירות אובייקטים אסטרונומיים" למידע נוסף.

הגדלה מינימאלית אפקטיבית

An astronomical phenomenon that occurs when the Moon passes into the shadow of the Earth. A partial lunar eclipse occurs when the Moon passes into the penumbra, or partial shadow. In a total lunar eclipse, the Moon passes into the Earth's umbra, or total shadow.

The degree of brightness of an object in the sky according to a scale on which the brightest star has a magnitude -1.4 and the faintest visible star has magnitude 6. Sometimes referred to as apparent magnitude. In this scale, each number is 2.5 times the brightness of the previous number. Thus a star with a magnitude of 1 is 100 times brighter than on with a visual magnitude of 6.

A measure of the total amount of matter contained within an object

Small particle of rock or dust that burns away in the Earth's atmosphere. 

Meteor shower is an event where a large number of meteors enter the Earth's atmosphere from the same direction in space at nearly the same time.

מנוע חשמלי

החצובה עליה רוכב הטלסקופ. ראה הרחבה במאמר לבחירת טלסקופ.

Cloud of dust and gas in space. Nebulae represent the raw material the stars are made of.

ציפוי אופטי

סוג האופטיקה. ראה הרחבה במאמר לבחירת טלסקופ.

הצינור / גליל האופטי של המערכת.