#1887: Two Down, One to Go explain

[There are three rows equally filled with squares and above are year dates beginning from 2002 until 2017. The first year (2002) is cut on the left and the color is light gray. It fades in to black, which it becomes in in 2005. To the left of the three rows the text reads:]

Total eclipse

Aurora

Meteor storm

[Below the year 2017 the squares in the first two rows are checked.]