The nucleus of the largest known comet in the Solar System, C/2014 UN271 (Bernardinelli–Bernstein), has been measured by the Hubble Space Telescope to be 129 kilometres across.
Messier 63 (NGC 5055), the Sunflower Galaxy in Canes Venatici, sits comfortably with its reputation as one of the great galaxies visible in the night sky at springtime.
If the optics of your telescope are well aligned but the views are still lacklustre, maybe it’s time for some new eyepieces. Ade Ashford helps you choose them.
These behemoth binoculars are the largest in Celestron’s SkyMaster range, but are they the ultimate for astronomical and terrestrial use? Ade Ashford finds out.