Glossaries
מנוח | הסבר המונח |
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Gear | תמסורת רגילה |
Geocentric | An adjective meaning “centered on the Earth.” Most early civilizations had a geocentric view of the universe |
Globular Cluster | Spherical grouping of hundreds of thousands of stars. Globular clusters are composed of older stars, |
Guide star | 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. |
H-R Diagram | 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. |
Highest Useful Magnification |
הגדלה מרבית אפקטיבית
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Infrared | Radiation that has longer wavelengths and lower frequencies and energies than visible light |
Light Gathering Power |
כושר איסוף האור של הטלסקופ
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Light Year | 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. |
Limiting Stellar Magnitude |
הכוכב החיוור ביותר הניתן לצפייה ישירה דרך הטלסקופ. ראה מאמר בנושא "בהירות אובייקטים אסטרונומיים" למידע נוסף.
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Lowest Useful Magnification |
הגדלה מינימאלית אפקטיבית
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Lunar Eclipse | 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. |
Magnitude | 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. |
Mass | A measure of the total amount of matter contained within an object |
Meteor | 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. |
Motor Drive |
מנוע חשמלי
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Mount |
החצובה עליה רוכב הטלסקופ. ראה הרחבה במאמר לבחירת טלסקופ.
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Nebula | Cloud of dust and gas in space. Nebulae represent the raw material the stars are made of. |
Optical Coatings |
ציפוי אופטי
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Optical Design |
סוג האופטיקה. ראה הרחבה במאמר לבחירת טלסקופ.
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Optical Tube OTA |
הצינור / גליל האופטי של המערכת.
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