As I expected, it's taking me longer than I expected to get the rest of the site (bio, non-blog writing, etc) up, so I thought I should address the issue of copyright. I've just gone back and added links for all the unattributed pictures except the Hubble one (I can't remember which news story I got that from, but it's almost certainly a stock beauty shot from the telescope's home page). So without further ado:

Copyright Notice
Case 1: If I didn't make it, it belongs to someone else and you should respect their rights and wishes. I certainly will: all legitimate requests regarding intellectual property and the content of this website will be speedily obliged. By "legitimate" I mean either "made by the owner of said property" or "reasonable, as determined by me".
Case 2: If I did make it, take anything you want, and do with it as you please. I reserve no rights bar this: if you alter something I made in any way, do not identify me as the author of the altered work. I'd love to hear back about anything you do with something you found here.

Update: as discussed here, I intend that this blog should be part of the public domain. You can take anything you find here (so long as I made it) and do anything with it that you like. I'd love to hear about it, but you're under no obligation whatsoever.