observatory visit

[Arathi-Sridhar]

hi.
we are visiting an observatory nearby tonight. hopefully the sky will be
clear and will let me take a few shots of the night sky.
Being my first, I guess I should use the standard lens and stick to large
constellations. Have Kodak 400 max loaded onto the K1000; tripod and cable
release complete the 'kit'. Optional are 28mm and a 50-250 zoom.
Inviting your suggestions, dos and donts.
thanks.
-Sridhar