Comet Neowise officially known as C/2020F3 is the brightest comet that can be seen in the sky and will be visible across the globe as it is closest to the earth these days. The Neowise, once disappears will be visible only after 6800 years.
‘Comet Neowise’ was first spotted by NASA's spacecraft mission Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) on 27 March 2020 and hence the name NEOWISE.
Comet is an icy small body which consists mostly of rocky materials, dust and ice. As they come closer to the sun there is evaporation of volatile contents from these comets. When they start melting, the particles start glowing by the reflected sunlight. This makes the 'dust tail' of Comets.