[daip] Question

[Famille Dreyfus]

Hello,
I'm a french student and I'm doing a research on radioastronomy. I'd
like to ask you some questions:
With what stuff the mirror of the radiotelescope is made of?
Can you observe during the day?
What advantage radioastronomy has on optical astronomy?
Can you send me some documents about radioastronomy???

Thank you very very much....
Guillaume Dreyfus
8 rue Danton
93310 Pré St Gervais FRANCE
fdreyfus at club-internet.fr