A metrology system capable of cofocusing and cophasing is essential to ensure the performance of large segmented space telescopes, similar to that of monolithic telescopes, as well as to image the ...

Plus, with Saturn making its return to the night sky next week after spending the last few months as a 'morning star', the ...

Perfect for families and kids — the Celestron Powerseeker 50AZ allows you to enjoy views of the night sky without breaking ...