Asteroid 2004 BL86 skims past Earth at a distance of just three times the Moon on the evening of 26th January. When best placed, it will become bright enough to see from the UK with small telescopes or large binoculars. Here's our hour-by-hour observing guide.
With this lens from ASA (Astro Systeme Austria) you can make rich-field Newtonian telescope even richer, whilst correcting aberrations, for stunning wide-field views or shorter exposures while astroimaging.
The United Nations has declared 2015 the International Year of Light, and to recognise the start of the event, the Chandra X-ray Center is releasing a set of images that combine data from telescopes tuned to different wavelengths of light.