What was Gan De's contribution to astronomy? A.
He developed the world's first star catalogue.
OB.
He was the first to record a lunar eclipse.
OC.
He was the first to observe planets.
OD.
He invented the telescope.

I'm sorry to hear that. i will try to answer your other questions if it is within my ability. : )answers: my favourite colour is black.my favourite food is pasta.my favourite school subject is english, but i do also like lunch time.my least favourite subject is history as well as geography. i have currently garnered a quite equal hatred for both of the subjects.what about you? well, you for the points. : )