DOCSLIB.ORG

Vibration Analysis of the Advanced Stirling Radioisotope Generators

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Vibration Analysis of the Advanced Stirling Radioisotope Generators Vibration Analysis of the Advanced Stirling Radioisotope Generators Tom Sutliff (for June Zakrajsek) Doug Mehoke NASA Apppplied Ph ysics Laborator y Small Body Assessment Group July 11, 2012 ASRG Major Components and Interfaces Advance d Stir ling RdiitRadioisotope Genera tor (ASRG) SBAG Meeting July 11, 2012 2 ASRG Component Status • ASCs (convertors) E3s - first build of flight configuration – The flight ASCs have completed their FDR (CDR) closeout, moving toward production (long leads were already authorized) – The first of the final engineering (E3) series ASCs are completed and are in checkout testing • ACU (controller) final engineering (EDU3) box is finishing its testing ASC ACUCU 3 ASRG Technical/Schedule Plans • System Performance (mass, power, environments) still meets Discovery-12 commitments • Component FDRs (CDRs) in process – Generator Housing passed - Aug 2011 – Convertors passed - Feb 2012 – Controller review passed - May 2012 • System FDR closeout - mid-July 2012 • QU fabrication complete - Oct 2013 – Two flight units to follow to DOE/Idaho National Lab • Two fueled flight units to KSC ~Aug 2015 • Typ ica lflihtdl flight deve lopmen t sc hdlhedule marg in in han d The ASRG development flow supports a January 2016 launch target 4 Hall System Development Milestone Status Projected Test Date HIVHAC thruster Performance GRC Completed December 2011 Acceptance Test (PAT) CPE Power Processing Unit Vacuum GRC Completed April 2012 Extended Operation Test (>500 hours) HIVHAC thruster Environmental GRC Completed May 2012 (()Vibration) Test Xenon Feed System Delivery GRC Completed June 2012 BPT‐4000 High‐voltage Wear Test JPL Scheduled September‐ October 2012 HIVHAC thruster Environmental JPL Scheduled November 2012 (Thermal Vacuum) Test HIVHAC Long Duration Wear Test GRC Scheduled December 2012 Initiation Hall Performance Verification Tests GRC Being FY13Q1/2 (in High Vacuum Test Chamber) Planned Hall Propulsion System Integration GRC Being FY15 Test Initiation Planned SBAG Meeting July 11, 2012 Discovery Technology Development for Whipple: Reaching into the Outer Solar System PI: Charles Alcock,,py Smithsonian Astrophysical Observatory July 11, 2012 •Less than 1 millionth of the volume of the solar system has been explored * •Objects beyond the Kuiper Belt are too distant to visit, & too faint to observe directly •This region will only be studied via the occultations of background stars •One candidate occultation event has been attributed to a small KBO *Schlichting et al 2009, Nature, 462, 895. The Whipple mission: Technology development plan is to build an end‐to‐end •Will monitor ~10,000 (20,000) stars @ 40Hz (20 Hz) to simulator of the Whipple photometer, including: search for occultations by small objects (0.5 km KBOs; 5 •Programmable LEDs to simulate stars undergoing occultation km Oort Cloud) between 40 AU and >10,000 AU events [done] •Observed fields widely distributed over sky •Simple lenses to represent Whipple optics [done] •Stars imaged by a 77 cm Schmidt‐Cassegrain optic onto •Teledyne CMOS detector with SIDECAR ASIC [in progress] a hybrid CMOS focal plane; field‐of view 6o×6o •Real‐time “on‐board” photometry and event recognition on •Photometry and light curve analysis (event search) FPGA board [in progress] performed on board because of high data rate •“Te lemetry to ground”/full end‐to‐end testing [Dec 2012] •Only candidate event data sent to ground for detailed •Version 1.0 of ground system analysis pipeline. [2013] analysis PriME is a Proposed NASA Discovery Mission The proposal was selected in the last round of Discovery in Category 3, which provides technology funding for the mass spectrometer. It is not an actual accepted mission (yet!) What is the range of chemical and isotopic diversity in the comet populti?lation? Is there any correlation between che mica l co mpos iti on an d nucleus physical properties? PriME will provide a detailed inventory of scores, if not hundreds, of volatile species. Motivation: Cryo-trapping Requirements for 30% precision 36Ar / 84Kr 1E+6 • Sample concentration >36 years – Even though MBTOF is over 1000 1E+5 analysis time times more sensitive than Cassini INMS (10x from ion source strength without and 100x from better duty cycle), concentration our) 1E+4 calculations show that it would take hh thirty six years to reach the desired precision through direct sampling. 1E+3 – Cryo-trapping increases the signal and reduces the reqqyuired analysis intervals nalysis time ( aa for the most difficult components – the 1E+2 noble gases - to ~40 hours. Total – The cryo-trapping also increases ion -6 source pressures to ~10 Torr, well 1E+1 abthtiitdhilbove the anticipated chemical background seen on Cassini INMS, improving signal to noise for the 1E+0 analysis. 1E+0 1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 Sample concentration factor Cryo-trap Implementation • Cryo-trapping Cold collimator – Long established vacuum technique excludes spacecraft – Freeze gas onto adsorber at 77K atmosphere – Uses space heritage Ricor cooler (used on CRISM, VIRTIS (Venus Express, Rosetta), VIR (Dawn), and Messenger Sleeve valve • Operation cycle rotttates to – Cool adsorber to 77K select inlet or – Open adsorber to gas MBTOF – Trap for required time – Open adsorber to MBTOF – Warm to release gas • Near term development plan – SwRI is in the midst of a very similar development program for space applications of cryo-trapping that will result in a TRL for the proposed cryo-trap before the due date of the MBC Discovery proposal. – The cryo-trap has been shown in the previous viewgraph to be necessary to Ricor reach the sensitivity levels for the noble cooler gas requirements from the RFI . cold-finger Adsorber head cooled to 77K MBTOF A Next Generation Mass Spectromete for Probing Solar System Formation.
Load more

Recommended publications
  • Stardust Sample Return
    National Aeronautics and Space Administration Stardust Sample Return Press Kit January 2006 www.nasa.gov Contacts Merrilee Fellows Policy/Program Management (818) 393-0754 NASA Headquarters, Washington DC Agle Stardust Mission (818) 393-9011 Jet Propulsion Laboratory, Pasadena, Calif. Vince Stricherz Science Investigation (206) 543-2580 University of Washington, Seattle, Wash. Contents General Release ............................................................................................................... 3 Media Services Information ……………………….................…………….................……. 5 Quick Facts …………………………………………..................………....…........…....….. 6 Mission Overview …………………………………….................……….....……............…… 7 Recovery Timeline ................................................................................................ 18 Spacecraft ………………………………………………..................…..……...........……… 20 Science Objectives …………………………………..................……………...…..........….. 28 Why Stardust?..................…………………………..................………….....………............... 31 Other Comet Missions .......................................................................................... 33 NASA's Discovery Program .................................................................................. 36 Program/Project Management …………………………........................…..…..………...... 40 1 2 GENERAL RELEASE: NASA PREPARES FOR RETURN OF INTERSTELLAR CARGO NASA’s Stardust mission is nearing Earth after a 2.88 billion mile round-trip journey
    [Show full text]
  • Oral History Whipple.Fm
    Meteoritics & Planetary Science 39, Supplement, A199–A213 (2004) Abstract available online at http://meteoritics.org Report Oral histories in meteoritics and planetary science: XIII: Fred L. Whipple Ursula B. MARVIN Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA E-mail: [email protected] (Received 13 June 2004) Abstract–Born in Red Oak, Iowa, in 1906, Fred Lawrence Whipple earned his Ph.D. in astronomy at the University of California at Berkeley in 1931. He immediately accepted a position at the Harvard College Observatory and remained at Harvard throughout his career. In 1950, he was appointed to the Phillips Professorship in the Department of Astronomy, and in 1955, he began serving concurrently as the Director of the Smithsonian Astrophysical Observatory when it moved from Washington, D.C. to Cambridge, Massachusetts. In the 1930s, Whipple established the Harvard Meteor Project in which two cameras, 26 miles apart, simultaneously photographed the same meteors, for which he invariably derived elliptical orbits indicative of their origin within the solar system. In 1950, Whipple introduced his “dirty snowball” model of comet nuclei, which soon became widely accepted and was fully confirmed in 1986 by close-up images of comet Halley taken by the European Space Agency’s Giotto spacecraft. Keenly anticipating the orbiting of satellites during the International Geophysical Year (July 1, 1957-December 31, 1958), Whipple won contracts to build a worldwide network of telescopic cameras for satellite tracking. At least one of the cameras was ready in time to photograph the Soviet Union’s Sputnik I satellite in October 1957, and all 12 stations were in operation by midsummer of 1958.
    [Show full text]
  • Thursday, October 11, 2012 INSTRUMENTATION for in SITU ANALYSIS MISSIONS (VENUS in SITU EXPLORER, TITAN, ETC.) I 8:30 A.M
    International Workshop on Instrumentation for Planetary Missions (2012) sess202.pdf Thursday, October 11, 2012 INSTRUMENTATION FOR IN SITU ANALYSIS MISSIONS (VENUS IN SITU EXPLORER, TITAN, ETC.) I 8:30 a.m. Building 34 — Conference Room 150 Chairs: Regis Courtin Shahid Aslam 9:00 a.m. Kraft R. P. * Kenter A. T. Alcock C. R. Murray S. S. Gauron T. M. Loose M. Werner M. Technology Development for the Whipple Mission Concept — Present Status and Future Work [1071] The Whipple mission was proposed to the 2010 Discovery program and funded for technology development. Whipple will conduct the first direct study of the outer solar system using a blind occultation survey. We discuss the status of our project. 9:15 a.m. Kobayashi M. * Shibata H. Nogami K. Fujii M. Miyachi T. Ohashi H. Sasaki S. Iwai T. Hattori M. Kimura H. Hirai T. Takechi S. Yano H. Hasegawa S. Srama R. Grün E. Mercury Dust Monitor for the BepiColombo MMO [1067] Mercury Dust Monitor (MDM) onboard the Mercury Magnetosphere Orbiter (MMO) will observe dust particles in orbit around Mercury during 1 year as nominal operation. In this paper, we report an overview of our instrument onboard the Bepi-Colombo MMO. 9:30 a.m. Reuter D. C. * Simon-Miller A. A. The OVIRS Visible/IR Spectrometer on the OSIRIS-Rex Mission [1074] This paper describes the OSIRIS-REx Visible and Infrared Spectrometer (OVIRS), a 0.4 to 4.3 µm point spectrometer on the the OSIRIS-REx (Origins Spectral Interpretation Resource Identification Security Regolith Explorer) mission. 9:45 a.m. Robinson M.
    [Show full text]
  • Dust Phenomena Relating to Airless Bodies
    Space Sci Rev (2018) 214:98 https://doi.org/10.1007/s11214-018-0527-0 Dust Phenomena Relating to Airless Bodies J.R. Szalay1 · A.R. Poppe2 · J. Agarwal3 · D. Britt4 · I. Belskaya5 · M. Horányi6 · T. Nakamura7 · M. Sachse8 · F. Spahn 8 Received: 8 August 2017 / Accepted: 10 July 2018 © Springer Nature B.V. 2018 Abstract Airless bodies are directly exposed to ambient plasma and meteoroid fluxes, mak- ing them characteristically different from bodies whose dense atmospheres protect their surfaces from such fluxes. Direct exposure to plasma and meteoroids has important con- sequences for the formation and evolution of planetary surfaces, including altering chemical makeup and optical properties, generating neutral gas and/or dust exospheres, and leading to the generation of circumplanetary and interplanetary dust grain populations. In the past two decades, there have been many advancements in our understanding of airless bodies and their interaction with various dust populations. In this paper, we describe relevant dust phenomena on the surface and in the vicinity of airless bodies over a broad range of scale sizes from ∼ 10−3 km to ∼ 103 km, with a focus on recent developments in this field. Keywords Dust · Airless bodies · Interplanetary dust Cosmic Dust from the Laboratory to the Stars Edited by Rafael Rodrigo, Jürgen Blum, Hsiang-Wen Hsu, Detlef Koschny, Anny-Chantal Levasseur-Regourd, Jesús Martín-Pintado, Veerle Sterken and Andrew Westphal B J.R. Szalay [email protected] A.R. Poppe [email protected] 1 Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08540, USA 2 Space Sciences Laboratory, U.C. Berkeley, Berkeley, CA, USA 3 Max Planck Institute for Solar System Research, Göttingen, Germany 4 University of Central Florida, Orlando, FL 32816, USA 5 Institute of Astronomy, V.N.
    [Show full text]
  • Orbit and Bulk Density of the OSIRIS-Rex Target Asteroid (101955) Bennu
    Accepted by Icarus on February 19, 2014 Orbit and Bulk Density of the OSIRIS-REx Target Asteroid (101955) Bennu Steven R. Chesley∗1, Davide Farnocchia1, Michael C. Nolan2, David Vokrouhlick´y3, Paul W. Chodas1, Andrea Milani4, Federica Spoto4, Benjamin Rozitis5, Lance A. M. Benner1, William F. Bottke6, Michael W. Busch7, Joshua P. Emery8, Ellen S. Howell2, Dante S. Lauretta9, Jean-Luc Margot10, and Patrick A. Taylor2 ABSTRACT The target asteroid of the OSIRIS-REx asteroid sample return mission, (101955) Bennu (formerly 1999 RQ36), is a half-kilometer near-Earth asteroid with an extraor- dinarily well constrained orbit. An extensive data set of optical astrometry from 1999{2013 and high-quality radar delay measurements to Bennu in 1999, 2005, and 2011 reveal the action of the Yarkovsky effect, with a mean semimajor axis drift rate da=dt = (−19:0 ± 0:1) × 10−4 au/Myr or 284 ± 1:5 m=yr. The accuracy of this result depends critically on the fidelity of the observational and dynamical model. As an ex- ample, neglecting the relativistic perturbations of the Earth during close approaches affects the orbit with 3σ significance in da=dt. The orbital deviations from purely gravitational dynamics allow us to deduce the acceleration of the Yarkovsky effect, while the known physical characterization of Bennu allows us to independently model the force due to thermal emissions. The combination of these two analyses yields a bulk density of ρ = 1260 ± 70 kg=m3, which indicates a macroporosity in the range 40 ± 10% for the bulk densities of likely analog meteorites, *[email protected] 1Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA 2Arecibo Observatory, Arecibo, PR, USA 3Charles Univ., Prague, Czech Republic arXiv:1402.5573v1 [astro-ph.EP] 23 Feb 2014 4Univ.
    [Show full text]
  • New Frontiers Mission Concept Study to Explore Oort Cloud Comets
    Community White Paper to the Planetary Science Decadal Survey New-Frontiers-Class Mission Concept Study to Explore Oort Cloud Comets New Frontiers Mission Concept Study to Explore Oort Cloud Comets Primary Author: Benjamin P. S. Donitz, Jet Propulsion Laboratory, California Institute of Technology Contact information: [email protected], 626-318-4029 Co-Authors: Karen J. Meech, University of Hawai‘i, Institute for Astronomy, [email protected] Julie Castillo-Rogez, Jet Propulsion Laboratory, California Institute of Technology, [email protected] Kimberly M. Moore, California Institute of Technology, [email protected] Samuel W. Courville, Planetary Science Institute, Arizona State University, [email protected] Sierra Ferguson, Arizona State University, [email protected] Kristie LLera, Soutwest Research Institute, San Antonio, [email protected] Tibor Balint, Jet Propulsion Laboratory, California Institute of Technology, [email protected] Endorsers: Stefano Nerozzi (Lunar and Planetary Laboratory, University of Arizona), Ariel N. Deutsch (Brown University), Jesse Tarnas (Brown University), Jeffrey Stuart (Jet Propulsion Laboratory, California Institute of Technology), Ellen C. Czaplinski (University of Arkansas), Donald H. Kuettel III (University of Colorado, Boulder), Alexander E. Thelen (NASA Goddard Space Flight Center; Universities Space Research Association), Ashley Schoenfeld (University of California, Los Angeles), George Clark (Johns Hopkins University Applied Physics Laboratory), Cyril
    [Show full text]
  • Planetary Sciences Section Newsletter: March 2016
    Planetary Sciences Section Newsletter: March 2016 Dear Colleagues, In this newsletter: 1. Message from the President 2. AGU Honors—Nominate a Deserving Colleague! 3. 2015 Fall Meeting—Report 4. 2016 Fall Meeting—Submit Your Session Proposals! 5. 2017 and 2018 Fall Meetings—New Locations 6. Japan Geoscience Union Meeting 7. Congressional Visits Day 8. Congressional Office Visits for Students 9. Journal of Geophysical Research: Planets Topical Special Sections 10.AGU Elections Coming Up 11.NASA Planetary Science Summer School Applications Open 12.Job Announcements and Links to Social Media Regards, Sarah Stewart AGU Section President, Planetary Sciences -------------------------------------------------------------------------------------------------------------------------- 1. Message from the President 2015 was a fantastic year for planetary science: New Horizons dazzled us all, and Mars continues to entice us with water. These stories, which headlined many lists for top science discoveries last year, exemplify the spirit of exploration that drives our field. We also had also a good year for the NASA Planetary Science Division budget. Your efforts in contacting Congress and expressing strong support for the goals of the decadal survey paid off! It is time to once again contact your congresspersons to support a strong NASA budget. You can read about the details of the 2017 NASA budget request at the Planetary Society and see how it compares with previous budgets. The bottom line is that we have work to do to keep the planetary budget from shrinking. Take a moment to send a note to your representatives. Please also take a moment to consider nominating a colleague for a section award or AGU Fellowship. You may be surprised who you think is a Fellow but has not yet been nominated.
    [Show full text]
  • Deep Impact Encounter
    NATIONAL AERONAUTICS AND SPACE ADMINISTRATION Deep Impact Comet Encounter Press Kit June 2005 Media Contacts Dolores Beasley Policy/Program Management 202/358-1753 NASA Headquarters, Washington, DC DC Agle Deep Impact Mission 818/393-9011 Jet Propulsion Laboratory, Pasadena, Calif. Lee Tune Science Investigation 301/405-4679 University of Maryland, College Park, Maryland Contents General Release …………………………………………………….........................................…… 3 Media Services Information ………………………….................…………….........................……. 5 Quick Facts ...………………………………………….....................................................................6 Why Deep Impact ?…………………..........………………………………..............................…….7 Comet Missions ............................................................................................................... 8 NASA's Discovery Program ........................................................................................... 10 Mission Overview ……………………………………….................……….............................…… 14 Encounter Events .......................................................................................................... 19 Spacecraft ………………………………………………..................…...….............................…… 23 Science Objectives ……………………………………..................………...............................….. 25 Comet Cratering 101 ..................................................................................................... 32 Program/Project Management ……………….......……….......................................………….....
    [Show full text]
  • Technology Development for the Whipple Mission Concept – Present Status and Future Work
    International Workshop on Instrumentation for Planetary Missions (2012) 1071.pdf TECHNOLOGY DEVELOPMENT FOR THE WHIPPLE MISSION CONCEPT – PRESENT STATUS AND FUTURE WORK. C. R. Alcock1, S. S. Murray2, R. P. Kraft1, A. T. Kenter1, T. M. Gauron1, M. Loose3, and M. Werner4, 1Smithsonian Astrophysical Observatory, 2Johns Hopkins University, 3Markury Scientific, 4JPL Introduction: The Whipple mission, "Reaching into the Outer Solar System", was proposed to NASA's 2010 Discovery program and was awarded funding for technology development. Whipple will conduct the first direct, systematic study of the outer Solar system, the Kuiper belt, the Sedna region, and the Oort cloud, using a blind stellar occultation survey. The instrument will monitor photometrically 10,000 stars at a cadence of 40 Hz (or 20,000 at 20 Hz, ...) to search for stellar occultations by outer solar system objects to character- ize the size and spatial distribution of these objects. The occultations typically last less than a second, so the photometer must be able to continuously monitor the light curves of a large number of stars at video rates. The focal plane will be composed of 32 Teledyne H1RG sensors, each with a dedicated SIDECAR ASIC and an FPGA to process the light curve data and identify candidate occultation events. The H1RG sensor will be operated in a windowing mode with between 700 and 3000 windows per sensor at rates up to 40 Hz. We are currently developing an end-Ââto -Ââend system at SAO to evaluate the focal plane concept. This system includes a stellar occulta- tion simulator that stimulates the sensor with simulated light curves, a Teledyne sensor with custom readout software to operate the sensor and SIDECAR ASIC in this windowed mode, and an FPGA that will process the light curves and identify candidate events.
    [Show full text]
  • Stardust Launch
    NATIONAL AERONAUTICS AND SPACE ADMINISTRATION Stardust Launch Press Kit February 1999 Contacts Douglas Isbell Policy/Program Management 202/358-1753 Headquarters, Washington, DC Franklin ODonnell Stardust Mission 818/354-5011 Jet Propulsion Laboratory, Pasadena, CA Mary Beth Murrill Stardust Mission 818/354-6478 Jet Propulsion Laboratory, Pasadena, CA George Diller Launch Operations 407/867-2468 Kennedy Space Center, FL Vince Stricherz Science Investigation 206/543-2580 University of Washington, Seattle, WA Contents General Release ................. ... 3 Media Services Information ................. .... 6 Quick Facts .................. .... .. 7 Why Stardust? ............................... ................ ..... 8 Other Comet Missions ..................................................................................................... 10 NASAs Discovery Program ............................................................................................ 11 Mission Overview ................. ... 14 Spacecraft .................. .. 25 Science Objectives .................. ... .. 33 Program/Project Management ................... .. 36 1 2 RELEASE: STARDUST MISSION SET TO BRING BACK A PIECE OF A COMET NASA's Stardust mission, scheduled for launch February 6, 1999 from Cape Canaveral, FL, will send a spacecraft flying through the cloud of dust that surrounds the nucleus of a comet and, for the first time ever, bring cometary material back to Earth. Comets, which periodically grace our sky like celestial bottle rockets, are thought to hold
    [Show full text]
  • Deep Impact Launch
    NATIONAL AERONAUTICS AND SPACE ADMINISTRATION Deep Impact Launch Press Kit January 2005 Media Contacts Don Savage Policy/Program Management 202/358-1727 NASA Headquarters, Washington, DC DC Agle Deep Impact Mission 818/393-9011 Jet Propulsion Laboratory, Pasadena, Calif. Lee Tune Science Investigation 301/405-4679 University of Maryland, College Park, Maryland Contents General Release …………………………………………………….........................................…… 3 Media Services Information ………………………….................…………….........................……. 5 Quick Facts ...………………………………………….....................................................................6 Why Deep Impact ?…………………..........………………………………..............................…….7 Comet Missions ............................................................................................................... 8 NASA's Discovery Program ........................................................................................... 10 Mission Overview ……………………………………….................……….............................…… 14 Spacecraft ………………………………………………..................…...….............................…… 22 Science Objectives ……………………………………..................………...............................….. 25 Program/Project Management ……………….......……….......................................…………...... 29 1 2 GENERAL RELEASE: NASA SET TO LAUNCH FIRST COMET IMPACT PROBE Launch and flight teams are in final preparations for the planned Jan. 8, 2005, liftoff from Cape Canaveral Air Force Station, Fla., of NASA's Deep Impact spacecraft.
    [Show full text]
  • Stardust Activity Guide
    National Aeronautics and Educational Product Space Administration Educators Grades 5–8 ACTIVITY GUIDE Think SMALL in a BIG way A DISCOVERY MISSION National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California JPL 400-855 8/99 EG-1999-08-010-JPL Think SMALL in a BIG Way An Educator’s Activity Guide for the STARDUST Mission for Grades 5-8 Brought to you by National Aeronautics and Space Administration Jet Propulsion Laboratory, California Institute of Technology and The STARDUST Opportunity and Outreach Team: Challenger Center for Space Science Education The JASON Foundation for Education Omniplex at Kirkpatrick Science and Air Space Museum STARDUST™ is a trademark of the California Institute of Technology. Images copyright 1999 Jet Propulsion Laboratory, California Institute of Technology. All rights reserved. Permission is given to reproduce this Activity Guide for the preparation of educational materials that are not for profit. Acknowledgments This activity guide has been developed by the STARDUST Opportunity and Outreach Team as part of the Jet Propulsion Laboratory’s STARDUST mission educational outreach program. Team members include: Challenger Center For Space Science Education JASON Foundation for Education Omniplex at Kirkpatrick Science and Air Space Museum Advisory Board Members Donald Brownlee, Ph.D. Wendell Mohling, Ph.D. STARDUST Principal Investigator Associate Executive Director of University of Washington Conventions and Professional Programs National Science Teachers Association Mary Gromko State Science Coordinator Colorado Department of Education Ellen Hardwick, Ph.D. Aerospace Education Services Program National Aeronautics and Space Administration A special thanks for the activities that were developed and contributed to this activity guide by the Education Outreach Team members: “Comet Cratering”—Challenger Center for Space Science Education.
    [Show full text]