Are we about to see a rare green comet light up the sky? An expert explains what to expect from Comet Nishimura 

 There's a slight chance Comet Nishimura might brighten unexpectedly. Astronomer Jonti Horner explains what to expect. 

https://cdn.mos.cms.futurecdn.net/EJR3uDAAertDGgwUHszna3.jpg

https://www.space.com/comet-nishimura-green-comet-expert-astronomer-explains