An all-sky picture of the infant universe revealing 13.77 billion-year-old temperature fluctuations (shown as color differences) that correspond to the seeds that grew to become the galaxies. (Credit: NASA/WMAP Science Team)
Astrophysics is a branch of astronomy that explores the physical properties of the cosmos and its composition. Astrophysicists study a broad range of topics, from the tiniest particles of matter and the forces that join them together to the grandest of celestial structures. In essence, astrophysics extends the workings of physics and chemistry that we experience directly here on Earth into the vastness of space. It is both an observational and theoretical science. To probe the universe's past, present and future, astrophysicists have built some of the most complex and precise machines in the world, including terrestrial and space-based telescopes tuned to various wavelengths. The continued seeking of new discoveries is constantly pushing the limits of telescope and model-building technology.
John Carlstrom, Dan Marrone and Joaquin Vieira discuss how the world’s most powerful radio telescope revealed that the most vigorous bursts of star birth in the cosmos took place much earlier than previously thought.
On Thursday, Feb. 28, 12:00-12:30pm PDT, science writer Bruce Lieberman will ask your questions about the new data on cosmic rays in an interview with Stefan Funk, Assistant Professor of Physics, Stanford University, and member, KIPAC.
What is dark matter? We don’t know, but cosmologists, astrophysicists and experimental particle physicists say they are closing in on an answer. Read a short explanation of what scientists consider the leading candidate, as well as the methods being used to detect dark matter.
As the search for dark matter intensifies, a colloquium brought together cosmologists, particle physicists and observational astrophysicists --- three fields now united in the hunt to determine what is dark matter.
KIPAC DIrector Roger Blandford discusses the recent meeting "Dark Matter Universe: On the Threshold of Discovery," which brought together astrophysics, cosmologists and particle physicists about the state of discovering dark matter.
Dark galaxies – galaxies with few if any stars and made predominately of dense gas – have been impossible to detect directly until now. Members of an international team of astronomers discuss their discovery and the place these galaxies hold in the universe.
Pascal Oesch, a Hubble Fellow at the University of California at Santa Cruz, and Michele Trenti of the Kavli Institute of Cosmology, University of Cambridge, discuss the Hubble telescope deepest ever image of the universe.