Fifty Recent Colloquia

New Developments in Orbital Debris Prevention and Protection2014-07-01

  • Hull, Scott
  • Orbital Debris has received increased attention lately among NASA missions, international space agencies, and even Hollywood. How much debris is really out there, where is it worst, and what can be d ... [MORE]

10 Years of Infrared Exploration with the Spitzer Space Telescope2014-06-13

  • Werner, Michael
  • In March of 2004, within a few months of the start of the scientific mission of the Spitzer Space Telescope, I talked here at GSFC about the scientific results that were only just starting to emerge ... [MORE]

Satellite Geodesy and NASA Earth Remote Sensing Missions2014-06-06

  • Luthcke, Scott B.
  • NASA's Earth remote sensing satellite missions have achieved significant scientific successes and have benefited society in numerous ways. Typically each mission has a sensor instrument or a suite of ... [MORE]

Latest Results from Voyager 1 Observation in the Very Local Interstellar Medium2014-05-30

  • Hill, Matthew
  • Voyager 1 (V1) traveled into a region of space dominated by interstellar particles and a high magnetic field strength in August 2012. Whether V1 crossed a traditional heliopause or some other sort of ... [MORE]

Tracing Human Migration using Genetic Markers2014-05-19

  • Schanfield, Moses
  • Of all species on the face of the earth, humans are the most disperse, in that they occupy the most diverse eco-systems, present on all large land masses and most large islands. In recent time much w ... [MORE]

The Great Transition: Shifting from Fossil Fuels to Wind and Solar Energy2014-05-16

  • Brown, Lester
  • As oil insecurity deepens, the extraction risks of fossil fuels rise, and concerns about climate instability cast a shadow over the future of coal, a new world energy economy is emerging. The old eco ... [MORE]

Extreme Spacecraft Engineering2014-05-12

  • Kusnierkiewicz, David
  • The Johns Hopkins University Applied Physics Laboratory Space Department has the privilege of conducting investigations of some of the most extreme places in the solar system for NASA. From exploring ... [MORE]

Putting a New Spin on Black Holes2014-05-09

  • Reynolds, Christopher
  • According to Einstein's General Relativity (GR), a spinning black hole twists up the nearby space-time. Studying these effects in real black hole systems provides, in principle, a powerful way to tes ... [MORE]

Tor's onion routing to secure and private communications for diverse users2014-05-07

  • Syverson, Paul
  • Tor is a system widely used throughout the world for free and open access to the Internet while protecting anonymity and other properties of communications. We will present a brief introductory overv ... [MORE]

GPR 7123.1B: System Engineering Requirements Update2014-05-06

  • Firman, Cynthia
  • The talk will be on the updates made to the GPR 7123 from version .1A to .1B for GSFC to be in compliance with the changes made from NPR 7123 version .1A to .1B. [MORE]

'We died at such a place!' The Interaction of Battlefield Archaeology and Forensic Science2014-05-05

  • Rowe, Walter F.
  • Battlefield archaeology has begun to emerge as a recognized discipline within the field of anthropology. Battlefield archaeologists use the methods of archaeology to interpret human behavior on battl ... [MORE]

Modeling Extreme Events in the Earth System2014-05-02

  • Oman, Luke
  • Climate models represent an excellent test bed to examine low probability but high impact events and scenarios. This talk will focus on 3 extreme forcings of the Earth climate system: one that happen ... [MORE]

Modeling Wildfires: Past, Present and Future2014-04-28

  • Gollner, Michael
  • In 2012, wildland fires burned more than 4.3 million acres, destroying 4244 structures and killing 34 firefighters. An accurate computer model of wildland fire is therefore essential, for land use pl ... [MORE]

The Puzzle of Energy Release in Solar Eruptive Events2014-04-25

  • Holman, Gordon
  • Solar eruptive events are large explosions on the Sun that produce both a solar flare, characterized observationally by rapid, intense brightenings, and the ejection of substantial material from the ... [MORE]

Tools for Creative Graphics2014-04-23

  • Shamir, Ariel
  • Powerful computer applications today allow manipulating digital objects in unimaginable ways. An exciting new trend allows fabricating and creating objects in reality using 3D printing and other tech ... [MORE]

Minimizing Human Factors Mishaps in Unmanned Aircraft Systems2014-04-14

  • Waraich, Raza
  • Unmanned aircraft system (UAS) mishaps attributable to lack of attention to human factors/ergonomics (HF/E) science in their ground control stations (GCSes) are alarmingly high. The ANSI/HFES 100-200 ... [MORE]

Saturn’s Great Northern Storm of 2010-2011: from storm clouds to hot vortices2014-04-11

  • Hesman, Brigette
  • The massive eruption at 40°N on Saturn in December 2010 has produced significant and lasting effects in the northern hemisphere on temperature and species abundance. When the storm clouds erupted int ... [MORE]

Connected Vehicles - Improving Safety, Mobility, and the Environment2014-04-09

  • Dopart, Kevin
  • USDOT's connected vehicle program aims to improve the operations of the transportation system by using technology to communicate between vehicles, the infrastructure and travelers. The presentation w ... [MORE]

John Wheeler's H-bomb Blues: Searching for a Missing Document in the High Cold War2014-04-07

  • Wellerstein, Alex
  • There's never a right time to lose a secret document under unusual circumstances. But for the influential American physicist John Archibald Wheeler, there might not have been a worse time than Januar ... [MORE]

How Explosive Was Ancient Mars?2014-04-04

  • Bleacher, Jacob
  • Mars displays ancient and vast deposits of volcanic materials including lava flows and ash. Furthermore, models to explain atmospheric and surface chemistry usually evoke degassing from ancient volca ... [MORE]

The Advanced Technology Large-Aperture Space Telescope (ATLAST): The Great Observatory to Follow JWST2014-04-01

  • Rioux, Norman
  • NASA's Science Mission Directorate has identified as a future high priority a very large-aperture space observatory operating from ultraviolet wavelengths into the near-infrared. The NRC in 2010 reco ... [MORE]

Interstellar Colonization on the Rapacious Hardscrapple Frontier2014-03-31

  • Hanson, Robin
  • Attempts to model interstellar colonization may seem hopelessly compromised by uncertainties regarding the technologies and preferences of advanced civilizations. However, if light speed limits trave ... [MORE]

Finding the Slippery Slope: Detecting Landslides from Space2014-03-28

  • Kirschbaum, Dalia
  • Rainfall-triggered landslides occur in nearly every country around the world, produce billions of dollars of damages and cause thousands of fatalities, and that is just in one year. Understanding and ... [MORE]

Meeting the Big Data Challenges of Climate Science through Cloud-Enabled Climate Analytics-as-a-Service2014-03-26

  • Duffy, Dan
  • Climate science is a big data domain that is experiencing unprecedented growth. In our efforts to address the big data challenges of climate science, we are moving toward a notion of Climate Analytic ... [MORE]

The Future of Virtual Reality2014-03-24

  • Asaro, Catherine
  • Can humanity remake itself with science? We may someday download our brains into computers or other technologies yet to be invented, or we may live in virtual universes so well developed that we can ... [MORE]

The First Year of Human Habitation, and Science, at the Geographic South Pole2014-03-21

  • Benson, Robert
  • The speaker was a scientific member of the first wintering-over party at the International Geophysical Year (IGY) Amundsen-Scott South-Pole Station in 1957. In addition to his scientific duties as th ... [MORE]

Science News in the 21st Century2014-03-14

  • Day, Charles
  • Science news is in a paradoxical state. On the one hand, newspapers and TV stations continue to shrink and cut their science coverage. On the other hand, more news about science is available than eve ... [MORE]

How Do We Facilitate the Use of Large Amounts of Heterogeneous Data, or ... Is Gleaning Knowledge from Information in Reach?2014-03-12

  • Kempler, Steve
  • Large Heterogeneous Datasets (aka Big Data) have come upon us, but what exactly does this mean. Actually, it means different things to different people. Articles, Symposiums, Conferences, Working Gro ... [MORE]

The Strange World of Quantum Computing2014-03-10

  • Lomonaco, Samuel J.
  • Quantum computers have the potential to greatly increase computational power beyond the capabilities of conventional computers by exploiting the bizarre quantum properties of the subatomic world. Thi ... [MORE]

Collisions in Space: The Threat of Asteroid Impacts2014-03-07

  • Hayes-Gehrke, Melissa
  • An asteroid impact is an astronomical threat that could become reality. The Earth and other planets have been impacted by asteroids in the past, with several specific impacts providing key informati ... [MORE]

Ice Lubrication for Moving Heavy Stones to the Forbidden City in 15th - 16th Century China2014-02-24

  • Stone, Howard
  • Lubrication plays a crucial role in reducing friction for transporting heavy objects, from moving a 60-ton statue in ancient Egypt to relocating a 15,000-ton building in modern society. Although in C ... [MORE]

The NICER Mission: a Partnership in Science and Technology on the ISS2014-02-21

  • Gendreau, Keith
  • The Neutron Star Interior Composition ExploreR (NICER) is an X-ray astrophysics mission of opportunity that will reveal the inner workings of neutron stars, cosmic lighthouses that embody unique grav ... [MORE]

Designing Trajectories for Low-thrust Propulsion2014-02-10

  • Kirchman, Frank
  • Low-thrust electric propulsion technology enables access to difficult targets in the solar system. A spacecraft using electric propulsion can often deliver a much larger payload to its destination th ... [MORE]

The Science of Star Trek2014-02-03

  • Batchelor, David
  • "The Science of Star Trek" was the title of an article written by the speaker in 1993, just after the inception of the World Wide Web. Because of the popular topic and because the article was hosted ... [MORE]

Imaging the Earth's Interior with Geo-neutrinos2014-01-31

  • McDonough, William
  • Radioactive decay of U and Th gives off ghost-like, neutrino particles that can be detected by 1000 ton detectors built a mile underground, where they are shielded from the cosmic rays that rain down ... [MORE]

Space Technology vs. Tomb Robbers in Central Turkey2014-01-27

  • Tucker, Compton
  • This talk will describe the use of NASA technology to study the ancient site of Gordion, home to the legendary King Midas. The technologies used include 50 cm resolution satellite images, ground-pene ... [MORE]

Dune Worlds - How Windblown Sand Shapes Planetary Landscapes2014-01-24

  • Lorenz, Ralph
  • Dramatic progress has been made in recent years in understanding sand dunes, a landform recognized on Earth, Mars, Titan and Venus (and prominent in fictional worlds too). Ever-improving remote sensi ... [MORE]

Exploring Mercury: Scientific Results from the MESSENGER Mission2014-01-17

  • Nittler, Larry
  • As the smallest planet in our solar system, and the closest to the Sun, Mercury represents an end-member of planetary formation processes. Although visible to the naked eye, it is difficult to study ... [MORE]

Traffic: Why We Drive the Way We Do (and What It Says About Us)2013-12-16

  • Vanderbilt, Tom
  • Why do traffic jams happen? How does the "windshield view" affect the way we see the world around us? Do people who merge at the last moment in construction work zones actually slow overall traffic? ... [MORE]

Attack of the Gamma-Ray Spiders from Space!2013-12-13

  • Ray, Paul
  • The Fermi Gamma-ray Space Telescope has been surveying the sky in the gamma-ray band (photon energies of 100 MeV and greater) since August 2008. The Large Area Telescope, Fermi's prime instrument, ha ... [MORE]

The Solar Cycle Conundrum2013-12-06

  • Strong, Keith
  • We have known for 170 years that sunspots come and go on a roughly 11-year timescale. Despite many efforts to develop empirical or physical models of the solar cycle, we have failed to find a method ... [MORE]

Gamera: A Human Powered Helicopter2013-11-25

  • Chopra, Inderjit
  • Since August of 2008, the University of Maryland's Team Gamera has been engaged in an ongoing effort to advance innovations in human-powered helicopter flight. A talented team of more than 100 underg ... [MORE]

Mars: Periglacial Morphology and Ice Stability2013-11-22

  • Heldmann, Jennifer
  • At the Mars Phoenix landing site and in much of the martian northern plains, there is ice-cemented ground beneath a layer of dry permafrost. Unlike most permafrost on Earth, though, this ice is not l ... [MORE]

Is The Sky Really Falling? Identifying And Managing Spacecraft Conjunction Risks2013-11-18

  • Burns, Rich
  • The era of managing spacecraft conjunction risks using the "big sky" theory is over. Today's more crowded space environment dictates a more rigorous approach. This talk will discuss the current proce ... [MORE]

Volcanism on Io: Implications for a Subsurface Magma Ocean2013-11-15

  • Hamilton, Christoher
  • Jupiter's moon Io is the most volcanically active body in the Solar System, with a mean surface heat flux that is 20 times larger than on the Earth. However, unlike the Earth, extreme volcanism on Io ... [MORE]

Antarctic Rifts as an Analog for Studying Tidal Motions along Cracks on Icy Satellites2013-11-08

  • Hurford, Terry
  • A variety of ridges and dilational bands have been observed on Europa. Double ridges, which are thought to flank a central fracture, are among the most common tectonic features on Europa. While their ... [MORE]

Systems Engineering of the James Webb Space Telescope2013-11-05

  • Menzel, Michael
  • The James Webb Space Telescope (JWST) will be NASA's successor mission to the Hubble Space Telescope. The JWST telescope will have an aperture greater than 6 meters in diameter, and along with its co ... [MORE]

Waking a Giant: Bringing the Saturn Era F-1 Engine Back to Life2013-11-04

  • Betts, Erin M.
  • After decades of slumber, a team of engineers at Marshall Space Flight Center embarked on an endeavor to wake an F-1 engine and bring it back to life. An advanced F-1 engine is currently in the trade ... [MORE]

It Is Rocket Science -- Remarkable Discoveries from NASA's Sounding Rocket Program2013-11-01

  • Pfaff, Robert
  • For over five decades, NASA's Sounding Rocket Program has provided a steady stream of scientific and technological advancement to support research objectives of NASA's Science Mission Directorate. So ... [MORE]

Astrobiology and the Anthropocene Epoch2013-10-25

  • Grinspoon, David
  • Informed by comparative planetology and a survey of the major episodes in Earth history, this lecture will offer taxonomy of planetary catastrophes meant to illuminate the unusual nature of the "Anth ... [MORE]