---

• n  the branch of astronomy concerned with the physical and chemical properties of celestial bodies

• A PTI 100 honoree, the director of New York City's Hayden Planetarium and the host of PBS's Nova Science Now, he's brought astrophysics down to earth.
• In an e-mail, David Spergel, a theorist with the WMAP project and the chair of the astrophysics department at Princeton, explains that the microwave signal from the Big Bang has .
• Tyson accepted, on one condition: "I asked them to establish a research department of astrophysics," he says.

News & Articles

---

• New Class Of Stars Identified Through Minute Variations In Brightness
  [ Watch the Videos: The Star Cluster NGC 3766 | Zooming in on the Star Cluster NGC 3766 ] Lee Rannals for redOrbit.com - Your Universe Online Astronomers writing in the journal Astronomy & Astrophysics say they have discovered a new type of variable star . The Swiss astronomers discovered the new class of variable stars by measuring minute variations in stellar brightness. The new results are ...
  June 12, 2013 - redOrbit
• Study Says There’s Much More Galactic Gas In Milky Way Than We Thought
  Brett Smith for redOrbit.com - Your Universe Online The building blocks of stars, clouds of molecular gases, are strewn across the Milky Way , and a new survey from the European Space Agency (ESA) and NASA has found that scientists have been underestimating the amount of gas in the galaxy by about one-third. According to a new report in journal Astronomy and Astrophysics , the discovery was made ...
  June 11, 2013 - redOrbit

Quotes

---

• Andrea in Science Daily (press release)
  Johns Hopkins University and the Department of Physics and Astronomy have a rich heritage of research at the forefront of experimental astrophysics, including the Hubble Space Telescope. I'm thrilled to be joining the university community and look... John Grunsfeld http://www.google.com/url?q=http://en.wikipedia.org/wiki/John_M._Grunsfeld&source=dictionary&usg=AFQjCNE-o3cMj7K_w2dclac22wof2dZsig Newswise (press release) http://www.google.com/url?q=http://www.newswise.com/articles/hubble-repairman-becomes-research-professor-at-johns-hopkins-university&source=dictionary&usg=AFQjCNGvHe2HkVKnYijMFJrtxS5iixnZPQ Jul 8, 2010 6209 9061 astrophysics The JETSET network was truly innovative in that it combined not only theoretical and observational astrophysics, but also for the first time experiments," said Andrea Ciardi, convenor of the ESF workshop and plasma physicist at the Ecole...
• David Spergel in Newsday
  His influence on the field was enormous. Entire subfields of astrophysics either would not have existed without him, or would have been radically different,said David Spergel, chairman of Princeton's astrophysical sciences department.