This was only three years after three Dutch spectacle-makers had brought out the first working refracting telescopes
An unassuming spiral staircase in the Great Equatorial Building leads up to the dazzling 28in refracting telescope
It depicts the gibbous moon at last quarter, and was based on observations made using a small refracting telescope
fitted with an eyepiece micrometer to give an accurate measurement of the lunar features.
In the summer of 1609, philosopher and inventor Galileo Galilei made his first refracting telescope
The safest way to view a partial eclipse is by projecting the sun's image through a small refracting telescope
, placing a piece of white card behind the telescope's eyepiece and looking at the telescope's shadow on the card.
The Netherlands was the home to inventors of both the compound microscope and the refracting telescope
, between 1590 and 1610.
The observatory invites visitors to see the moon and stars through its 12-inch Zeiss refracting telescope
and equip these rooms for the childhood she wished for him: pennants and paraphernalia artfully mounted (a Cooper's hockey stick and a Louisville baseball bat, crossed like swords, to suggest his nascent love of sports; a brass refracting telescope
at a window, pointed to the sky, to connote his searching mind).
Previous telescopes could only magnify three times but Galileo's refracting telescope
could magnify objects 20 times making it possible to use it for astronomy.
He was about to scrap the 30inch-wide refracting telescope
until a chance encounter at an astronomical meeting saved the day.
Redevelopment of the observatory will also signal a return to use of the rare refracting telescope
The SWIR mirror does double duty by periodically directing light from either of the two calibration lamps into the SWIR's fixed, refracting telescope
The Observatory houses the seventh largest refracting telescope
in the world.
The first telescope that Galileo used was a refracting telescope
, making use of lenses only.
The Yerkes Observatory's 40-inch refracting telescope
, then the largest of its type in the world, was completed in 1897.