aerial telescopes造句

• The objectives for aerial telescopes sometimes had very long focal lengths.
• As long as these were, they were actually much shorter than the longest singlet refractors in aerial telescopes.
• The Huygens contrived some ingenious arrangements for aiming these " aerial telescopes " at an object visible in the night sky.
• His deduction of the rotational period of Venus was based on the observation of its surface using a 2.6 " ( 66mm ) 100 foot focal length aerial telescope.
• Edmond Halley visited Saint Helena on leaving the University of Oxford in 1676 and set up an astronomical observatory with a aerial telescope, with the intention of studying stars from the Southern Hemisphere.
• On leaving the University of Oxford, in 1676, Edmond Halley visited Saint Helena and set up an observatory with a aerial telescope with the intention of studying stars from the Southern Hemisphere.
• On leaving the University of Oxford, in 1676, Edmond Halley visited Saint Helena and set up an observatory with a aerial telescope and observed the positions of 341 stars in the Southern hemisphere.
• These eyepieces work well with the very long focal length telescopes ( in Huygens day they were used with single element long focal length non-achromatic refracting telescopes, including very long focal length aerial telescopes ).
• Although there had been very large ( and unwieldy ) Non-achromatic aerial telescopes of the late 17th century, and Chester Moore Hall and others had experimented with small achromatic telescopes in the 18th century, John Dollond ( 1706 1761 ) invented and created an achromatic object glass and lens which permitted achromatic telescopes up to 3 5 in ( 8 13 cm ) aperture.
• They compared its performance with that of a diameter aerial telescope originally presented to the Royal Society by Constantijn Huygens, Jr . and found that Hadley's reflector, " will bear such a charge as to make it magnify the object as many times as the latter with its due charge ", and that it represents objects as distinct, though not altogether so clear and bright.