Showing posts with label Instrumentation. Show all posts
Showing posts with label Instrumentation. Show all posts

Monday, October 15, 2012

October 5: X-ray Spectacular!

On October 5th, over 175 people came to Doug Thornhill's talk on the newly launched X-ray telescope NuSTAR. NuSTAR was assembled at the Nevis Laboratories of Columbia University and Doug worked with the NuSTAR team for almost four years as an undergraduate student at Columbia since the beginning of the project. He provided a clear and thorough explanation on how x-ray telescopes work, with a physical demonstration on how light is detected by the telescope. Doug then showed how NuSTAR was built and discussed the scientific goals of the telescope including the survey of super-massive black holes, supernovae remnants and compact objects, as well as the study of the energy transport of our sun.

After the talk, some people stayed in the lecture hall to enjoy the movie "High Energy Vision: The Chandra X-ray Observatory," which is another NASA X-ray telescope launched more than a decade ago. 

As it was a fairly clear night, many people headed up to the roof to view the night sky through the telescopes. Additionally, Columbia undergrad, Bryan Terrazas, showed 3D movies on the 13th floor. 

Join us for our next event on October 19th, when we will hear from Or Graur on how astronomers use the universe as their laboratory.

--Yuan

Tuesday, May 1, 2012

April 27: How is a Hubble Image Made?

The beautiful pictures of our universe provided by the Hubble Space Telescope are some of the most inspiring in Astronomy. This past Friday, PhD student Christine Simpson explained to attendees how these images are made. Explaining the basics of the telescope, CCDs and the color-assignment process, everyone could walk away with a deeper appreciation of these images.

In response to requests from several audience members, Christine has provided the following links related to her talk: Hubble’s Hidden Treasures contest and contest submissions to date; a nice explanation of the meaning of color in Hubble images; and an article from Sky & Telescope that describes Hubble image processing.

After the talk, some stayed to hear about Hubble's successor, the James Webb Space Telescope. The cold weather also provided clear skies for observations on our roof. Columbia students helped visitors observe Saturn, the Moon, and the Mizar-Alcor star system in the Big Dipper's handle. Visitors were also able to experience our 3D wall. Our next lecture of the semester is May 11th. We hope to see you there!

 --Lauren