Reflecting or reflector telescopes utilise a single mirror or ... the light from the main or 'primary' mirror is deflected by a small flat secondary mirror, set at such an angle that it is sent ...

On Thursday 27 March, the European Space Agency (ESA) sent its last messages to the Gaia Spacecraft. They told Gaia to shut ...

Small instruments – whether for amateur astronomers starting ... while telescopes flown aboard balloons or aircraft need to be compact. Although reflecting telescopes can be much lighter than ...

most major observatories are Newtonian reflectors. During the nascent years of the telescope, most devices were relatively small, even handheld. When you consider the modern astronomy hobby and at ...

Radio telescopes are one of the more high-profile pieces of scientific apparatus. There is an excitement to stories of radio astronomers of old probing the mysteries of the Universe on winter ...

Satellites come in all shapes and sizes, but there aren't any that look quite like SPHEREx, an infrared observatory NASA ...

He reached a point of diminishing returns beyond which enlarging the image made what was seen through the telescope too small to be of ... was the first working reflecting telescope.

The favored scheme was an array of relatively small dishes (antennas), with a nearly-random ... ground surrounding the telescope. Moving the reflector assembly off-center minimizes the chance of ...