#1402: Harpoons explain

Number of harpoons in space

by year

[A chart with a red graph is drawn below.]

[The y-axis.]

0 1 2 3

[The x-axis.]

1950 1960 1970 1980 1990 2000 2010 2020

[The graph is at zero until a sharp peak to 1 in 1970. The peak is labeled.]

Apollo 12 rum incident

[The graph then stays at 0 until 2004. Then it rises to 2 and stays there until today, continuing as a dotted line after 2014. The rise is labeled.]

Rosetta comet mission launched carrying lander with harpoon tethers