Now, read the information in the time line.
Edmond Halley
says that comets
orbit the sun.
1705
1066
A famous European
piece of art showing
a comet is created.
() What did Edmond Halley say in 1705?
Comets orbit the sun.
1950
Fred Lawrence Whipple
describes comets as
"dirty snowballs."
Comets were first seen in Europe.
A NASA mission
collects samples
of comet dust.
2006
Comet dust can be collected.