Physical and Astronomical Constants

 Orbiting Binary Stars

 Geoff Marcy's Planet Search Web Page

  Harvard planet search page

  Sedna: farthest planet in the Solar System

  New planet discovered by microlensing NASA press release Princeton press release

Virtual Telescope

A virtual tour of the Solar System

Virtual Planet Laboratory

Star charts and other good stuff

 Astronomy Hyper Text Book

 The Galaxy Gallery: Messier Objects

 Astronomy Picture of the Day Archive

 NASA/IPAC Extragalactic Database

 Space Telescope Science Institute home page

 SDSS home page

  NRAO home page

  ALMA project

 Keck telescope

 Extrasolar Planets Encyclopedia

  Wayne Hu's introduction to the microwave background

  Black body radiation

  More on black-body radiation from UVA physics web site

  LBL particle physics tutorials: very useful
 

 Introduction to Cosmology
 

  WMAP papers

  Research on the First Stars

SDSS redshift diagrams and luminosity function   Redshift diagram to z=0.16  Redshift Diagram to z=0.4  Luminosity Function
 

 Voyager pictures of the outer planets
 

 Snowball Earth
 

 Quoaor: the second largest Kuiper belt object
 

 Asteroid impact calculator