From April 2020 through to July 2020, Comet ATLAS C/2019 Y4 will be passing close to the Sun and will often be visible in the night sky from the UK - at its brightest, perhaps with the unaided eye. Here you can see where the comet is today.
Update: In early April the comet started to break up. This can happen to comets as they get closer to the Sun and start to heat up. This is very interesting to watch, and can help astronomers to understand more about comets as they study the breakup in detail, but it does mean that the comet is rather fainter and so will probably not become visible to the unaided eye.
