Well, any of us who has ever looked through a telescope could say the same ... each of which comes into focus at a different point on the optical axis—hence the color fringes seen in refractors.

The research team of Wang Jianli of the Chun Institute of Optics, President of the Chinese Academy of Sciences, has made ...

Get closer to our solar companions with the best telescopes for seeing planets, just in time for February's fantastic planetary parade. Want to focus your stargazing on our cosmic neighbors ...

which can be used to quickly point a telescope at objects in the sky, with the aid of the right astronomical software. An ESP32 board runs the show, using AS5600 positional encoders on each axis ...