Each month, I host the Public Lecture Series at the Space Telescope Science Institute in Baltimore, Maryland. Before introducing the main speaker, I present some Hubble discoveries and other astronomical findings and events called "News from the Universe".
The stories I covered for the April 4, 2017 lecture are:
-- Evidence of a disrupted multiple star system in the Orion Nebula
-- Searching for a survivor of a supernova explosion
Here are the description and links to the main speaker's presentation for the April 2017 Public Lecture Series:
3D Spectroscopy and the Dynamics of Galaxies
David Law, Space Telescope Science Institute
Most people are familiar with how a prism splits the light of the Sun into its component rainbow of colors. Research astronomers use instruments called spectrographs to split the light from celestial objects and measure its intensity at different wavelengths. These spectral observations can be used to determine temperature, composition, motion, and more. Imaging spectrographs extend the entire 2D view of an image into a third dimension of wavelength, and have greatly expanded the capacity to map the motions of gas and stars within galaxies. Dr. Law will present the history of this powerful type of instrument, highlight what it has taught us about the evolution of galaxies over the last 12 billion years, and discuss some of the exciting science that such instruments on board the James Webb Space Telescope are expected to deliver in the near future.
- On the STScI webcasting page (speaker only): 3D Spectroscopy and the Dynamics of Galaxies
- On the HubbleSiteChannel on YouTube (full event): 3D Spectroscopy and the Dynamics of Galaxies
An archive of lecture webcasts back to 2005 is available at STScI Webcasting: STScI Public Lecture Series Archive.
Most lectures since spring 2014 are also in a HubbleSiteChannel YouTube playlist: STScI Public Lecture Series Playlist.