October 5th - Slooh your way to the stars

What's in an acronym? Paige Godfrey, Slooh's research director, gave us an overview of the services offered by this online observatory. As of today, Slooh provides access to six telescopes. The majority, 5, are located in the Canary Islands. These include their largest instrument with an aperture of 0.5 meters (20 inch). Another telescope in Chile gives access to the many interesting objects located in the southern sky, and a solar scope equipped with a narrow band H-alpha filter allows observations of the solar chromosphere. By locating their observatories under some of the darkest skies, they facilitate access to high quality observations to individuals who would live in areas that suffer from light pollution (all cities).

Individuals can access the data obtained by the cameras attached to Slooh's telescopes. Paige showed some examples of work done by members of their community, from processed images, mosaics and gifs, to discoveries of new comets. Since the processing of astronomical data can have a rather steep learning curve, they're developing materials to make it easy for anyone to get started.

Paige explained how these resources allow schools to incorporate observational astronomy into their curriculum, and they're launching a specific program, AstroLab, with the support of the National Science Foundation.

As an illustrative example of how Astronomy can help answer some of the most fundamental questions we've asked ourselves through history, Paige introduced the use of Drake's equation, a way to quantify the number of communicating civilizations in a given volume, and applied it to the set of stars visible in a typical image taken with one of Slooh's telescopes. Turns out vulcanians may be out there for real!

-- Jose Zorrilla (graduate student)

April 19: Extragalactic FM

On Friday, April 19th, Ph.D. candidate Destry Saul shared with us the wonders of the Universe as seen  in the radio portion of the electromagnetic spectrum. He introduced the audience to some of his favorite radio images taken with his favorite radio telescopes. Radio telescopes can either be single dish (like Arecibo or Parkes) or arrays (like the VLA or the VLBA). Objects that emit in the radio include galaxies, supernova remnants, and pulsars. Destry's favorite objects include the closest and most powerful radio source, Cygnus A, and the brightest radio supernova remnant, Casseopeia A.

Unfortunately, the skies were quite cloudy, so observing was replaced by tours of our rooftop observatory given by graduate students Adrian Price-Whelan and Steph Douglas. Audience members were also treated to a guided viewing of our 3D Wall by undergraduate Gladys Velez-Caicedo, and a discussion of the other end of the electromagnetic spectrum, X-ray astronomy, by graduate student Yuan Li.

We hope to see you at our next event on May 3rd.

--Summer Ash (Director of Outreach)

February 15: My Life as a Higgs Boson

Friday, February 15th, Gladys Velez Caicedo had the very difficult task of explaining what exactly the Higgs Boson is and how its existence is necessitated by the Standard Model of Physics. The Standard Model explains all the particles we know, such as protons, neutrons, and electrons, along with their interactions. Gladys is a second year undergraduate at Barnard College studying Astrophysics and Literature and is a researcher at Nevis Laboratories working with the Very Energetic Radiation Imaging Telescope Array System (VERITAS) and the Fermi Large Area Telescope (LAT) aboard the Fermi Gamma-ray Space Telescope. If you missed the talk or if you just want to immerse yourself in some hard-core physics, you can view the slides from Gladys's talk here.

Over 175 people came out for the event, and we were lucky to have the roof available for star-gazing for an hour after the lecture despite the encroaching cloud cover. The 3D wall was manned by Bryan Terrazas.

After the lecture, I led a small discussion in which we talked about the recent meteorite impact in Russia, along with the near-Earth asteroid that came within 17,200 miles of us, closer than orbiting equatorial geosynchronous satellites! In comparison, the moon is between 220,000 to 250,000 miles away. The discussion was slightly free-form due to the recent nature of the event, and it included us watching some internet videos from Russia. The discussion also focused on efforts humans are undertaking to detect future near-Earth asteroids and possible collisions. Thanks to all who came and participated in this Friday’s outreach program!

Meteor and asteroid videos:
Russia Meteorite Compilation
Another Meteorite Video
Asteroid 2012 DA14 Close Approach
Asteroid Discoveries

--Emir Karamehmetoglu (undergraduate student)

February 1: Saving Hubble

On Friday, February 1st, we kicked off our spring Public Lecture & Stargazing series with not a lecture, but a film. Saving Hubble is a documentary that chronicles NASA's decision to cancel the Hubble Space Telescope in 2004 and the subsequent public outcry. Filmmaker David Gaynes interviewed people far and wide on their thoughts about the pioneering space telescope that became a household name, from scientists and engineers who worked on Hubble to amateur astronomers, cabdrivers, and kids who are self-proclaimed "Hubble Huggers." After the screening, Summer Ash led Q&A with David and Ph.D. candidate, Christine Simpson.

If you missed the film, you can see a clip of it here and find out about upcoming screenings here.

The event attracted a sizable audiences of over 200 people who got to see some great sights from the rooftop telescopes after the film, thanks to the clouds that decided to clear out. Graduate students Jeff Andrews, Lauren Corlies, Ximena Fernandez, and David Hendel had telescopes trained on Jupiter and the Orion Nebula, both wonderful offerings of the winter sky. We also had the 3D wall up and running.

Join us on Feb. 15th for our next event: My Life as a Higgs Boson.

 --Summer Ash (Director of Outreach)

November 16: Living with the Stars

Dr. Helena Uthas's talk was of a different strain than most of our previous outreach events. She shared her experiences of the three years she spent as a support astronomer on the beautiful and isolated Spanish island of La Palma, off the coast of western Africa. It is one of the prime spots for astronomy in the world today, having the best “seeing” available on our little blue planet (seeing is how much the atmosphere perturbs the images of stars as seen through a telescope).

In this personal narrative, Dr. Uthas walked the audience of ~180 people through her time at the Swedish Solar Telescope (SST) and the Nordic Optical Telescope (NOT) and the life of an astronomer in such a remote location. We were shocked and impressed by the difficult loneliness that such a job requires, yet there also was a sense of lusting for the introspection afforded being in one of the most beautiful and untouched natural vistas in the world. After this captivating mix of science, nature, and self, the majority of the audience went up for observing. We had almost 200 people on the roof throughout the event, and our telescopes were pointed at the extremely bright Jupiter, along with the Pleiades star cluster and the Andromeda galaxy. Several people stayed in the lecture hall for a slideshow on galaxies. The evening wrapped up around 9 pm leaving attendees having played astronomer over the skyline of New York City and vicariously experiencing the life of an observational astronomer through Dr. Uthas.

 --Emir

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

May 11: The Immortal Quantum

Our final speaker of the spring was PhD candidate, Cameron Hummels, who traced the path of energy through the Universe from the Big Bang to everyday processes here on Earth. In his usual enthusiastic style, Cameron reviewed the different forms energy can take using both himself and an array of props to demonstrate his points. Laying down the gauntlet for future speakers, Cameron capped his discussion of the conservation of energy with the legendary physics pendulum demo in which he released a x pound weight, attached to the ceiling of the lecture hall, and shut his eyes tightly as it swung away and then back to within millimeters of his chin. A great time was had by all 250+ audience members.

The skies mostly cooperated for visitors to observe some familiar targets such as Mars, Saturn and the Mizar and Alcor star system in the handle of the Big Dipper. Back indoors, graduate student Yuan Li led a discussion on brown dwarfs in the solar neighborhood and graduate student Jana Gcrevich ran our 3D Astro Wall.

On a closing note, Cameron is one of the founders of our outreach program. It's his blood, sweat, and tears that got his fellow graduate students and members of the department motivated to share their knowledge of the Universe with the public, teachers, and students of New York City. Unfortunately for us (but fortunately for the world of astronomy), Cameron is graduating this summer and leaving Columbia for the southwest where he will begin a post-doc at the University of Arizona on galaxy evolution. We wholeheartedly thank him for all his hard work and wish him the best of luck in his future endeavors.

Our summer event series kicks off Friday, June 1st. Stay tuned for more details…

--Summer

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

April 13: History of Astronomy and Navigation

On April 13, 260 people crowded a lecture hall in Pupin Physics Laboratories to hear Brandon Horn, graduate student in the Department of Astronomy, gave a lecture on the history of astronomy, navigation, geodesy, and photometry. Wowing the crowd with a zooming presentation, Brandon gave us a tour of major astronomical discoveries starting with the size of the Earth and moving all the way up to the expanding universe. People stayed after the talk to ask questions and explore the universe of Astronomy Picture of the Day in the lecture hall while others headed up the roof for a beautiful, clear view of the heavens.

On the roof, five volunteers helped visitors look at Mars, the Moon, the globular cluster M3, and the Orion Nebula. We were very fortunate to have such a clear view of the night skies and the huge number of visitors seemed to attest to how exciting it was to be able to use the observatories to their fullest capacity. Additionally, visitors who wanted to avoid the crowds could catch a show in our 3D theater where graduate student Yuan Li showed some videos about black holes and pulsars that the audience enjoyed. In all, a fun time was had by all.

--Josh

February 27: Harlem Sidewalk Astronomy

Five members of our department ventured out on a beautiful, clear evening into neighboring Harlem last night. We brought with us two small telescopes and loads of NASA bookmarks and posters to give out to interested participants. Setting up on the Federal Plaza at 125th street and Adam Clayton Powell (just down from the Apollo Theater), we pointed our telescopes towards some of the highlights of the sky this season: Jupiter, Mars, and the first-quarter Moon. Many curious passersby stopped to see what we were doing there and to take a glimpse of the heavens. Some individuals just wanted a chance to see the sky, while others wanted to discuss something astronomical they read in the news or heard from a friend.


In the end, the clouds came up to block our celestial viewing, and the wind shook our telescopes and made it unpleasant to stand around. We returned home, satisfied to have reached out to around 120 people over the course of the night. Great work, Bryan, Jennifer, Jose, and Marcus!

--Cameron

February 17: Life in the Universe

Last night, we had a very successful outreach event headlined by PhD student Maureen Teyssier discussing where to look for Life in the Universe. She outlined the various components we understand to be necessary for life to exist elsewhere in the Universe including appropriate elemental materials, liquids, energy and stability. Furthermore, she pointed out the various ways in which we humans are searching for life, both in and out of the Solar System. If you want to know more, Maureen's talk was inspired by "The Search for Life on Other Planets" by Bruce Jakosky.

There were excellent conditions for observing, so attendees who went to the roof got to catch a glimpse of Jupiter and its moons, the Double Cluster, and the Orion Nebula through our telescopes. We also the 3D Astrowall demonstrations of educational astronomy briefings. In the lecture hall, there was discussion of recent astronomical news of observations and modeling of galaxy collisions and a Q&A period with graduate students and postdocs from the department. In all, we had about 200 people come join us.

Our next event is Friday, March 2nd, hope to see you then.

--Cameron

December 2: Are there other Universes?

Last night we had a fantastic lecture given by postdoctoral researcher David Kagan entitled: "Is Our Universe Alone in the Multiverse?" David covered a full introduction to assure everyone was on the same page for this high-level but philosophically interesting subject. He described the idea of an expanding observable universe, the multiworlds interpretation of quantum mechanics, the inflaton field theory and how it could describe other universes popping into existence ourside of our observable window and more. After his talk, he fielded questions for the remainder of the period from a group of dedicated enthusiasts.

In addition to the lecture, we had great observing conditions on the roof. Adrian Price-Whelan led a crew of graduate volunteers on our telescopes, helping attendees see the Pleiades, the Andromeda Galaxy, the first-quarter Moon, and Jupiter. In addition Yuan Li ran the 3D visualization wall permitting attendess to see simulation results and education movies in 3 dimensional projections. Thanks to all of the 160 people we had turn out!

--Cameron

November 18: The Truth About Black Holes

On Friday, November 18th, over 200 astro enthusiasts gathered in Pupin to hear "The Truth About Black Holes." Dan D'Orazio shed some light on these enigmatic photon traps, discussing gravity, the equivalence principal and time as a malleable entity. Dan cut past the hype and speculation surrounding these theoretical predictions, and instead focused attention on the astrophysical contexts in which black holes exist, and how we can spot them.

Afterwards folks ascended to the roof, where Hugh Crawl, Jeff Andrews, Lauren Corlies, Sam Gordon and Lia Corralles showed visitors Jupiter, the Pleiades and Andromeda. For those who stayed downstairs, Munier Salem and Jenna Lemonias led a short quiz on Planet Trivia, which was entirely too easy for the stalwart enthusiasts.

--Munier

August 5: Practical Astronomy

While we're sad that summer is ending, this happily means the return of our lecture series! We started off on an unique and interesting note with Dr. M. Ryan Joung giving a talk on how astronomy can have practical uses or in his own words, "on the usefulness of 'useless' knowledge." Ryan used many examples to highlight the advances astronomy have spurred in other fields. Did you know that your GPS system uses quasars to calibrate the positions of its satellites in the sky? Or that they rely on Einstein's theories of special and general relativity for accuracy? Ryan also pointed out that taking and processing images have been the forte of astronomers for decades. Their work with CCDs have helped make modern cameras possible. Also, image processing techniques that astronomers use to study structures in galaxies are now successfully being used to identify cancer cells. While focusing on the practical aspect of astronomy, Ryan concluded by reminding us that astronomy is beautiful and we truly do it to understand our place in the universe.

After the lecture, we were lucky enough for the clouds to stay at bay and had our first public observing session of the new semester on the roof. Munier Salem, Josh Schroeder and Christine Simpson showed people the Moon, Saturn and Albireo. Meanwhile, Jana Grcevich led people on a "Tour of the Cosmos" using the 3D wall. Finally, some remained in the lecture hall to listen to presentations about JWST and Kepler from Lauren Corlies and Yuan Li. Overall, it was a great start to the semester.

March 25, 2011: Ancient East Asian Astronomy

This past Friday we had an excellent lecture on ancient east Asian astronomy given by graduate student Joo Heon Yoon. The talk focused on ancient astronomical techniques from Joo's homeland of Korea. Joo described how modern astronomers and historians can use observations made by ancient astronomers to constrain both scientific models and historical theories.

Hazy weather obscured the view for most of the night, but our roof volunteers persevered and gave visitors views of M44, the Orion nebula and Sirius. Our roof volunteers Neil Zimmerman, Richard Darst, Bryan Terrazas, Dan D'Orazio and Ian Allen did a great job. Graduate student Yuan Li also showed visitors 3d visualizations astronomical topics spanning the universe from the solar system to the formation of large scale structure. A few people stuck around in the lecture hall for slide shows on star clusters and exoplanet detection led by Christine Simpson.

Thanks to all our volunteers and to the 120 people who came to our
event.

Christine