Any binoculars are ok for astronomy even your naked eye, by all means go out and have a look through them and see what you think.
I would ideally recommend 10x50s though but enjoy the ones you have.
If you really want to see some good stuff though log on to some professional sized telescope (15 inchers) that you can control for as little as $5 per month.
http://www.slooh.com/