Universe Structure 
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Featured Article
Galaxies in the Early Universe
About ten years ago, astronomers using new submillimeter wavelength facilities discovered the existence of a new class of very distant galaxies. These objects are located so far away that their light...
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Featured Blog Post
Notes from the Astronomy Underground- Astropalooza
According to the tagline in Ridley Scott’s 1979 blockbuster Alien, “In space, no one can hear you scream.” It’s true that sound waves, unlike light, need a medium- some kind of...
Latest News
LIGO Listens for Gravitational Echoes of the Birth of the Universe
Caltech, Pasadena, CA (Aug. 19. 2009) – An investigation by the LIGO (Laser Interferometer Gravitational-Wave Observatory) Scientific Collaboration and the Virgo Collaboration has significantly...
