NADEAU, Daniel ( Montréal )

Nagoya University ( Department of Physics and Astrophysics )

Nancay Observatory

The Nançay Radio Observatory is a scientific department (the Unite Scientifique de Nançay) of the Paris Observatory, and it is also associated to the CNRS (the French National Scientific Research Council).

Nanjing Astronomical Instruments Research Centre ( NAIRC )

Nanjing Astronomical Intruments Research Centre (NAIRC), China, was founded by Chinese Academy of Sciences in 1958 for developing mainly the large and medium astronomical instruments and also other instruments by integrated optical, mechanical, electronical and computer techniques. There are about 520 staff members working in NAIRC, including one China Academician, 17 senior researchers and professors, 60 senior engineers and 150 technicians. They compose a technical team to study and design the overall astronomical instruments including optical system, precise mechanics, automatic and computer controls. NAIRC is equipped with precise mechanical machines,electronic testing instruments, large and medium optical fabricating machines, of which some are very rare in China. NAIRC is specialized in optical process technology for aspheric surface, birefringent crystal, etc. Its off axis aspheric technique is in the domestic lead position. The technology of antenna panel for millimetre wavelength radio telescope is also being advanced in China. NAIRC adopts astronomical technique and methods research as its subject direction. Its main developing areas are the instruments for stellar,solar and satellite observations,astrometric and radio astronomical instruments and other instruments by comprehensive techniques.The great achievements have been obtained in basic research field such as the active optics and astronomical optical interferometry, which have been placed as the major research projects of Chinese Academy of Sciences. Especially,after finishing the pre-research in NAIRC, the Large Sky Area Multi-objects Fibre Spectroscopy Telescope (LAMOST) has been rated as one of the major national scientific projects.
NAIRC is an authorized unit for training M.Sc and Ph.D students with the subject of "Astronomical Instruments and Methods". NAIRC is having wide international contacts with more than 20 countries. The multilevel academic exchange and technical-trade collaboration have been set up with overseas scientists, institutes and specialized corporations.

Naperville Astronomical Association ( NAA )

Amateur astronomy club for southwest Chicagoland (IL, USA).
Monthly public meetings; observatory hosts public observing evenings June - Sept.; observing sessions and other activities for members.

NAS/NRC Space Studies Board

The SSB is an advisory board within the National Research Council, which is in turn the operational arm of the National Academies of Sciences and Engineering. The SSB operates a number of standing committees and task groups that perform studies in space science and policy for the federal government.


NASA Organization Structure

Agency Organization

(See Center Organization)

Office of the Administrator
Jim Bridenstine
  Deputy Administrator: 
Jim Morhard
  Associate Administrator: 
Steve Jurczyk
  Deputy Associate Administrator: 
Melanie Saunders
  Chief of Staff: 
Thomas Cremins (acting)
  Associate Administrator for Strategy and Plans: 
Thomas Cremins

Advisory Groups 
NASA Advisory Council (NAC)
General Lester L. Lyles (USAF, Ret.)
Aerospace Safety Advisory Panel (ASAP)
Dr. Patricia Sanders

Office of the Inspector General 
Inspector GeneralPaul K. Martin

Administrator Staff Offices 
Chief Engineer: Ralph Roe
Chief Financial OfficerJeff DeWit
Chief Information OfficerRenee Wynn
Chief Scientist: Jim Green
  Chief Technologist: Douglas Terrier
    Chief Health and Medical Officer: Dr. James D. Polk
    Chief, Safety and Mission Assurance: Terrence W. Wilcutt
Diversity and Equal Opportunity:
            Associate Administrator: 
Stephen T. Shih
           Associate Administrator for Education:  
Mike Kincaid
International and Interagency Relations:
            Associate Administrator: 
Al Condes
General CounselSumara M. Thompson-King
Legislative and Intergovernmental Affairs:
            Associate Administrator: Rebecca Lee (acting)
    NASA Management Office:
            Director: Marcus Watkins
Office of Communications
            Associate Administrator: Bob Jacobs (acting)
Small Business Programs:
            Associate Administrator: 
Glenn Delgado

Mission Directorates
Aeronautics Research
            Associate Administrator: 
Jaiwon Shin
Human Exploration and Operations
            Associate Administrator: 
William Gerstenmaier
            Associate Administrator: 
Thomas Zurbuchen
Space Technology
            Associate Administrator: 
James Reuter (acting)

Mission Support Directorate
Mission Support Directorate
            Associate Administrator: 
Daniel J. Tenney
Human Capital Management:
                    Assistant Administrator: 
Bob Gibbs
Strategic Infrastructure:
                    Assistant Administrator: 
Calvin F. Williams
Headquarters Operations:
                    Executive Director: 
Jay M. Henn
NASA Shared Services Center:
                    Executive Director: 
Anita Harrell
                    Assistant Administrator: Monica Manning
Protective Services:
                    Assistant Administrator: 
Joseph S. Mahaley

 NASA Organization Chart (107KB PDF) 
(November 2015)

Other Space Agencies and Related Organizations

Centers and Facilities

Ames Research Center
IT, fundamental aeronautics, bio and space science technologies
Director: Eugene L. Tu

Armstrong Flight Research Center
Flight research
Director: David D. McBride

Glenn Research Center
Aeropropulsion and communications technologies.
Director: Janet Kavandi

Goddard Space Flight Center
Earth, the solar system, universe observations, and space communications and navigation
Director: Christopher J. Scolese

Agency leadership
Executive Director, HQ Operations: Jay Henn

Jet Propulsion Laboratory
Robotic exploration of the solar system
Director: Michael Watkins

Johnson Space Center
Human space exploration
Director: Mark S. Geyer

Kennedy Space Center
Prepare and launch missions around the Earth and beyond
Director: Robert Cabana

Langley Research Center
Aviation and space research
Director: Dave Bowles

Marshall Space Flight Center
Space transportation and propulsion technologies
Director: Jody Singer

Stennis Space Center
Rocket propulsion testing and remote sensing technology
Director: Richard J. Gilbrech

Goddard Institute for Space Studies
Broad study of global climate change
Director: Gavin A. Schmidt

Independent Verification and Validation Facility
Provides safety and cost-effectiveness for mission critical software
Director: Gregory D. Blaney

Michoud Assembly Facility
Manufacture and assembly of critical hardware for exploration vehicles.

NASA Engineering and Safety Center
Independent testing, analysis, and assessments of NASA's high-risk projects
Director: Tim Wilson

NASA Safety Center
Development of personnel, processes and tools needed for the safe and successful achievement of strategic goals
Director: Alan Phillips

NASA Shared Services Center
Financial management, human resources, information technology, and procurement
Executive Director: 
Anita Harrell

Wallops Flight Facility
Suborbital Research Programs
Director: William Wrobel


Nasmyth Adaptive Optics System ( NAOS, ESO VLT )

NATH, Biman ( RRI )

Nation River Observatory

Nationaal Instituut voor Kernfysica en Hoge-Eenergie Fysica ( NIKHEF )

National Academy of Sciences - Board on Physics and Astronomy ( National Research Council )

National Aeronautics and Space Administration ( NASA )

National Astronomical Observatory of JAPAN - Astronomical Data Analysis Center ( NAOJ-ADAC )

On-line Access Interface to Astronomical Data.

National Astronomical Observatory of Japan ( NAOJ )

National Astronomical Observatory of Japan - Solar Physics Division

The Solar Physics Division is made of two sections (Solar Activity and Solar Atmosphere) and one guest scientists section (Experimental Astrophysics). Research targets are solar and astrophysical plasmas, using satellites, ground-based telescopes, and MHD theory and computer simulations. The main instruments now used by the scientists in the Division are the Yohkoh satellite and the telescopes at Mitaka and Norikura.

National Astronomical Observatory of Spain ( OAN )

OAN is a 200 year old institution devoted to research in astronomy that operates several observatories. The Yebes Observatory is the site of a mm-wave 14m telescope devoted to spectroscopy and VLBI. A 1.5m optical telescope is located at the Calar Alto Observatory. The OAN is also the Spanish partner of IRAM, which runs a 30m mm-wave telescope and a 5x15m mm-wave interferometer.

National Center for Atmospheric Research ( NCAR )

National Center for Supercomputing Applications: Mosaic information browser ( NCSA )

National Centre for Radio Astrophysics ( NCRA )

National Centre for Radio Astrophysics is the leading centre in India for reseach in radio astronomy. It operates the Giant Metrewave Radio Telescope(GMRT), one of the most powerful radio telescopes in the world for radio astronomy at metre wavelengths.

National Climatic Data Center ( NCDC )

National Earth Orientation Service ( NEOS )

NEOS was organized to coordinate, collect, analyze, and distribute data from the various operational U. S. programs that monitor variations in the orientation of the Earth. These programs include the International Radio Interferometric Surveying (IRIS) very long baseline interferometry (VLBI) program coordinated by the GL, the Navy Network (NAVNET) program coordinated by the USNO, the VLBI program coordinated by the Jet Propulsion Laboratory (JPL), the satellite laser ranging (SLR) program of the National Aeronautics and Space Administration (NASA) and the University of Texas, the lunar laser ranging (LLR) program, with data analyzed at the University of Texas, and the Global Positioning System (GPS) data coordinated by the International GPS Service (IGS).

National Geophysical Data Center ( NGDC )

National Information Infrastructure ( NII )

National Institute of Space Research - Astrophysics Division ( INPE - DAS, Brazil )

In our department we have researchers working on the following topics: High Energy Astrophysics, Optical Astronomy, Radioastronomy, and Gravitational Waves.

National Laboratory for Astrophysics ( LNA, Brazil )

LNA is an Institute of the National Council for Scientific and Technological Development (CNPq). At present, LNA supports 3 telescopes: the 1.6-m Ritchey-Chretien and coudé, the 0.6-m Cassegrain and the 0.6-m telescope of the University of São Paulo.

National Learning Network for Remote Sensing ( NLN )

Web-based training courses in the Fundamentals and Applications of Remote Sensing.
Access free after registration. Produced by the Universities of Paisley, Edinburgh and Dundee in Scotland. Funded by the Scottish Higher Education Funding Council.

National Observatory of Athens Astronomical Institute ( NOA )

National Oceanic Data Center ( NODC )

National Oceanographic and Atmospheric Administration ( NOAA )

National Optical Astronomy Observatories ( NOAO )


National Radio Astronomy Observatory ( NRAO )

The NRAO is a facility operated by Associated Universities, Inc. under cooperative agreement with the National Science Foundation.
NRAO/VLA Information System -- Maintenance Report summaries (Open and to be Repaired); Official VLA, VLBA and VLBI NUG Schedules; General Info for Visitors to NRAO (New Mexico); VLA Specific Information; VLBA Specific Information; Weather Information
NRAO-Charlottesville ( Headquarters ; there is also an anonFTP server .
NRAO-VLA (Very Large Array)
NRAO-VLBA (Very Long Baseline Array)
NRAO-Green Bank (140-foot, GBT, OVLBI)

National Science Foundation ( NSF )

Includes: Deadlines for NSF Programs; Program Areas; Grant Proposal Guide; Guide to Programs; NSF Bulletins; Search Award Information and Abstracts; Fastlane Project; Communicating with the NSF; NSF Location and Directions; Publications; Publications Search Feature; Federal Research Centers; Federal Laboratories; Selected NSF-Funded Projects; Federal Agencies.

National Solar Observatory / Sacramento Peak, Sunspot, NM ( NSO/SP )

Anonymous ftp.

National Solar Observatory ( NSO )

Synoptic Solar Magnetograms

National Space Development Agency of Japan ( NASDA )

National Undergraduate Research Observatory ( NURO )

The National Undergraduate Research Observatory (NURO) at Lowell Observatory and Northern Arizona University is a 0.8m telescope located on Anderson Mesa south of Flagstaff, Arizona. NURO is a consortium of Universities and small colleges to provide a research grade telescope for undergraduate research and education.

National University of Ireland, Galway - Department of Physics

Includes; Astrophysics and Applied Imaging; Gamma-ray Astronomy.


International weekly journal of science

NatureJobs ( nature.com )

Comprehensive international listing of jobs on the Internet, updated weekly.

NAUMANN, Michael ( ESO )

Naval Research Laboratory Space Science Division ( NRL SSD )

Division scientists are involved in major research thrusts that include ultraviolet remote sensing of the upper atmosphere, studies of the solar atmosphere by using spectrographic techniques, and studies of atronomical radiation ranging from the ultraviolet through cosmic rays. This includes the mission operations and data analysis facilities for NRL's OSSE experiment on NASA's Compton Observatory. Contains links to Backgrounds Data Center, X-ray Astronomy Branch, Gamma and Cosmic Ray Astrophysics Branch, Solar Physics Branch, Coronal Physics Section, Far-Ultraviolet Cameras Experiment, and more.

Naval Research Laboratory ( NRL )

NCSA AipsView Visualization System ( AipsView )

AipsView is a tool for visual data analysis built at NCSA with support from the NSF/ARPA Grand Challenge project in Radio Astronomy Imaging, and in cooperation with the AIPS++ programming project. AipsView is a tool for two-dimensional visualization and relies on Motif and Xlib for its user interface and drawing capabilities. A companion tool for three-dimensional visualization, AipsView3, requires OpenInventor. AipsView3 is at an early stage of development, and is not yet described on these pages.

NCSA Astronomy Digital Image Library ( NCSA ADIL )

The purpose of the NCSA Astronomy Digital Image Library is to collect fully processed astronomical images in FITS format format and make them available to the research community and the general public via the World Wide Web. The collection will contain images from research observatories all over the world and taken at all wavebands.

NCSA Software

Neal S. Katz ( UMASS )

Near Earth Object Program ( NEO )

The Near-Earth Object Program Office at the Jet Propulsion Laboratory was established by NASA in mid-1998 to help coordinate, and provide a focal point for, the study of those comets and asteroids that can approach the Earth's orbit.

Near-Earth Asteroid Tracking ( NEAT )

NEAT is an autonomous celestial observatory located at the USAF/Ground-based Electro-Optical Deep Space Surveillance (GEODSS) site on Haleakala, Maui, Hawaii. It is designed to complete a comprehensive search of the sky for near-Earth asteroids and comets.

Nearby Field Galaxy Survey ( NFGS )

The Nearby Field Galaxy Survey (NFGS) is a collaborative effort to construct a photometric and spectrophotometric reference atlas and catalog of the observable properties of ~200 nearby field galaxies. The galaxies span a wide range in luminosity and color, and are of all morphological types. This survey is designed to be a benchmark for interpreting the spectra and imagery of distant galaxies. (A U.S. mirror is located at http://cfa-www.harvard.edu/~jansen/nfgs/).

Ned Wright's Cosmology Tutorial

Cosmology is the study of the origin, current state, and future of our Universe. This field has been revolutionized by many discoveries made during the past century. This cosmology tutorial is an attempt to summarize these discoveries. It will be "under construction" for the foreseeable future as new discoveries are made. These pages are kept up-to-date as a resource for the cosmology courses at UCLA.

NEELEY, James ( Idaho )

Neff, James ( College of Charleston )

NEFF, John S. ( University of Iowa )

The item of general interest is a directory containing Fortran source code for lecture demonstration programs.

NEMO Stellar Dynamics Toolbox ( NEMO )

NEMO is a Stellar Dynamics Toolbox with many programs to create, integrate, analyze and visualize N-body (and related) systems. In addition there are various tools to operate images, tables and orbits, including FITS files to import/export data to/from other data reduction packages.

Net Advance Physics ( NetAdvPhys )

Online encyclopaedia of physics/astrophysics; includes most review papers in the Los Alamos preprint base catalogued by subject. Will someday hopefully be a complete subject-index to online physics and astrophysics literature.

Netherlands Foundation for Research in Astronomy ( NFRA )

NETLIB Software

Netlib is a collection of mathematical software, papers, and databases.

Network Resources for Astronomers

A report prepared by Bob Hanisch (STScI) for the AAS in October 1992.

Neural Network Papers

NEUSTROEV, Vitaly V. ( Udmurt State University, Russia )

Research interests: cataclysmic variables and close binaries, accretion discs.

Neutrino Oscillation MAgnetic Detector ( NOMAD )

Nomad (Neutrino Oscillation MAgnetic Detector) is CERN experiment WA96. The experiment searches for the oscillation nu_mu -> nu_tau in the CERN wide-band neutrino beam. It aims at detecting tau-neutrino charged-current interactions by observing the production of the tau lepton through its various decay modes by means of kinematical criteria.

New Astronomy Reviews ( Former title: Vistas in Astronomy )

New Astronomy Reviews publishes review articles in all fields of astronomy and astrophysics: theoretical, observational and instrumental. This international review journal is written for a broad audience of professional astronomers and astrophysicists.
The journal covers solar physics, planetary systems, stellar, galactic and extra-galactic astronomy and astrophysics, as well as cosmology. New Astronomy Reviews reviews research in all wavelength bands, ranging from radio to gamma-ray, as well as computational and laboratory astrophysics.

New Astronomy

New Astronomy is fully electronic, available on the World Wide Web. A traditional paper edition is also published. The electronic version is linked to major scientific data centers, such as CDS, ADS, and NED.
New Astronomy aims to publish only the best articles in this field, without page charges, and with a very short publication time. Each field is represented by a specialist Editor who is directly responsible for the review process.

New England Light Pollution Advisory Group ( NELPAG )

Information concerning improved outdoor lighting to reduce glare and obtrusive light.

New Jersey Astronomical Association ( NJAA )

"The Paul H. Robinson Observatory" and the "Edwin E. Aldrin, Jr. Astronomical Center" stands on eighteen acres at an elevation of almost nine hundred feet in Voorhees State Park

New Mexico Institute of Mining & Technology - Physics Department

New Mexico State University - Department of Astronomy ( NMSU )

Contains information on faculty, staff, and students and their research and educational activities, as well as descriptions of department astronomical facilities.

New Mexico State University Astronomy Preprints ( NMSU )

Department members' recent preprints sorted by subject type.

New Mexico Tech - Physics Department - Astrophysics Program

Main research domains:

·      Dynamics and Kinematics of Nearby Galaxies

·      Magdalena Ridge Observatory (MRO)

·      Plasma Astrophysics

·      Pulsars

·      Plasma Physics in Clusters of Galaxies

·      Radio Galaxies and Their Cluster Environment

·      Radio Studies of Normal, Exploding, and Compact Stellar Systems.

New Mexico Tech Astronomy Club

New Scientist

Planet Science

NEWMAN, Peter ( Univ. Central Lancashire )

·      Large-scale structure

·      Quasars

·      Multi-object spectroscopy

Next Generation Space Telescope listservs ( NGST Listservs )

This URL takes you to a WWW page where you can subscribe to a number of listservs devoted to the Next Generation Space Telescope project. You may subscribe to any of them. Posting is restricted. Right now, these are used as ways to inform the community about progress in the project. The web site contains links for feedback to the project team members.

Next Generation Space Telescope ( NGST )

The Next Generation Space Telescope (NGST) is a critical component of NASA's Origins Program. It will be a telescope of aperture greater than 4m, radiatively cooled to 30 - 60 deg.K, permitting extremely deep exposures at near infrared wavelengths with a 10 year life. A key requirement is to break the HST cost paradigm through the use of new technology and management methods. This site is designed to serve as the starting point for finding online NGST Study documentation.
There is also a public
home page at NASA, and a European site at ST-ECF.

NFO's Automatic Radio Linked Telescope

Observatory associated with Western New Mexico University in Silver City, NM (USA).

NGC/IC Project

The NGC/IC Project is an attempt to correctly identify all of the original NGC and IC objects, starting with the original discoverer 's notes and working forward in time to encompass the work of contemporary astronomers, both professional and amateur, such that the identity of each of the NGC and IC objects is known with as much certainty as we can reasonably bring to it from the existing historical record. Contains a lot of historical NGC/IC data, including the original NGC and IC's. Also contains an on-line NGC/IC public access database as well as an NGC/IC observing list generator.

Nice University, Astrophysics Department

NICE, David ( Princeton University )


The Near Infrared Camera and Multi-Object Spectrometer (NICMOS) is a second-generation instrument to be installed on the Hubble Space Telescope (HST) during the February 13, 1997 on-orbit servicing mission. NICMOS will provide infrared imaging and spectroscopic observations of astronomical targets between 0.8-2.5 microns.

Nicolaus Copernicus Astronomical Center

Nicolaus Copernicus University - Institute of Astronomy

Nine Planets ( a tour of the solar system )

A descriptive page about each major object in the solar system.

NITSCHELM, Christian ( Astrophysicist )

Photometry, Stellar evolution, beta Pictoris stars, Total solar eclipses, Solar corona, History of Astronomy.

NMSU Numerical Cosmology Group

NOAO Newsletters

The NOAO Newsletter is published quarterly. Issues starting with June 1992 are available on-line but only those Newsletters dated June 1996 and later are full-up HTML files. Each issue is seachable, plus a variety of search options are available from this page.

Nobeyama Radio Observatory, NAOJ ( NRO )

Information regarding the 45-m Telescope, the Millimeter Array(NMA), the Large Millimeter and Submillimeter Array (LMSA) project, and much more.

NOBLE, John ( GSU )

Active Galactic Nuclei

Nojum magazine ( Iranian magazine of Astronomy )

Nojum is astronomy in Persian. This is a resource for Amateurs in Iran and middle East. [in English and Persian].

Nonproliferation and International Security ( NIS/LANL )

The interests in astrophysics of the Astrophysics and Radiation Measurements Group (NIS-2) focus on gamma-ray bursts, x-ray binaries, accretion- and rotation-powered pulsars, neutron star dynamics, atomic processes in astrophysical sources, soft x-ray and EUV backgrounds, and EUV and soft x-ray transients such as flare stars.
An important mission of the group is to develop new types of optical, ultraviolet, x-ray and gamma-ray detectors for ground and space applications. The group has flown high-energy instruments on Pioneer Venus Orbiter, the ISEE-3 (ICE), P78-1, Vela satellites, and the Japanese satellite Ginga. The group is currently developing experiments for several scientific missions including the X-ray Multimirror Mission (XMM), High Energy Transient Explorer (HETE), MARS-96, and the MOXE all sky x-ray monitor on the Russian Spectrum X-Gamma satellite project, and is the lead institution operating the Array of Low Energy X-ray Imaging Sensors (ALEXIS) satellite and its wide field-of-view ultrasoft x-ray telescope array.
The group is actively participating in Compton Gamma Ray Observatory (CGRO) and Rossi X-ray Timing Explorer (RXTE) research through several guest investigator projects, and is also involved in establishing the growing-up Fenton Hill Observatory in the Jemez mountains, which includes an ultra-high-energy gamma-ray telescope, Milagro.

NORDGREN, Tyler ( Cornell )

Nordic Optical Telescope - Staff members ( NOTSTAFF )

Personnel at the NOT, info and pictures.

Nordic Optical Telescope ( NOT, La Palma )

NORDLUND, Åke ( Copenhagen )


North American Skies ( Sky Happenings for the layman )

North American Skies is the online web version of a monthly astronomy newsletter started in the late 1980s for television weather reporters in Denver. It provides information on easy-to-observe objects and events visible throughout North America (and most of the world). Each month's issue contains a star chart, calendar, inforamtion on the planets, plus an article of topical or temporal interest. Material on North American Skies is available for reprint if proper credit, including URL, is given.

North Carolina State University - Astrophysics ( NCSU )

A description of activities and resources within the Astrophysics Research group in the Department of Physics at North Carolina State University. Contents include preprints, description of ongoing research, astrophysics MPEGs, and graduate research opportunities

North Carolina State University - Mars Mission Research Center

Co-located at North Carolina State University in Raleigh (NCSU) and North Carolina Agricultural and Technical State University in Greensboro (A&T), the Mars Mission Research Center (M2RC) is one of eight University Space Engineering Centers established by NASA in 1988. The goal of the Center is to focus on research and educational technologies necessary for planetary exploration, especially transportation to and from Mars.

North Shore Amateur Astronomy Club ( NSAAC )

NSAAC is an Astronomy club of the North Shore in Massachusetts,USA

Northeast Kansas Amateur Astronomers' League ( NEKAAL )

The Northeast Kansas Amateur Astronomers' League (NEKAAL) was founded in 1978. NEKAAL operates Farpoint Observatory (opened in 1996), located southwest of Topeka, Kansas. Farpoint houses a 17.5 inch reflector and associated observing tools.

Northern Arizona University - Department of Physics and Astronomy ( NAU )

Northern Lights Planetarium ( Norway )

The Northern Lights Planetarium opened on May 20th 1989, and it is Norway's first public planetarium, and now Norways first virtual planetarium

Northwestern University - Astronomy ( NWU )

Contents include information on undergraduate studies and graduate studies, who we are, what we do, and our gallery of gamma-ray bursts as observed by the Oriented Scintillation Spectrometer Experiment (OSSE) on board the Compton Gamma-Ray Observatory (CGRO).

Norwich Astronomical Society ( NAS )

The Norwich Astronomical Society is based at the Seething Astronomical Observatory, Norwich, Norfolk, UK. The observatory houses a 30-inch Newtonian reflector which is the second largest amateur-built telescope in the UK.

Notebook of a Comet Hunter ( Tim Harincar )

Logs and notes of an amateur astronomer's search for undiscovered comets.

Noto VLBI Station

Notre Dame Astrophysics Group

NOVAK, Giles ( Northwestern Univ. )

NRAO 12m Telescope Schedules

NRAO Arizona Operations ( NRAO-TUC )

The National Radio Astronomy Observatory Arizona Operations is the center for the following NRAO activities: (1) 12 Meter Telescope and (2) Millimeter Array Development Activities.

NRAO Charlottesville ( NRAO-CV )

This web page contains links to these items, among others: AIPS (Astronomical Image Processing System), AIPS++, NRAO Headquarters, The Central Development Lab, and the main NRAO Library.

NRAO Library, Charlottesville

RAPshhet, PageCharge Policies.

NRAO Preprints and Published Papers

Full text of preprints by NRAO staff or visiting observers in PostScript format with ascii text abstracts.


Fill-in form to search the database of all preprints received at NRAO from 1986 forward, with citations to published papers. Included are preprints by NRAO authors as well as preprints received from authors and institutions worldwide. The database is updated weekly.

NRAO VLA Sky Survey ( NVSS )

The NRAO VLA Sky Survey (NVSS) is mapping the sky north of -40 deg declination at 1.4 GHz. The principal data products are (1) 4 deg X 4 deg continuum maps " cubes" with three planes containing Stokes I, Q, and U images, (2) source lists, and (3) processed (u,v) data sets. The maps have 45 arcsec FWHM resolution and nearly uniform rms noise, about 0.45 mJy/beam = 0.14 K (Stokes I) and 0.29 mJy/beam (Stokes Q and U). The rms uncertainties in right ascension and declination vary from 0.3 arcsec for strong (S > 30 mJy) point sources to 5 arcsec for the faintest (S ~ 2.5 mJy) detectable sources.

NRL Solar Physics Branch ( NRL )

There are three active experimental programs in the Solar Physics Branch: The Large Angle Coronagraph-Spectrograph (LASCO) experiment is one experimental package aboard the Solar and Heliospheric Observatory (SOHO), a joint ESA/NASA mission, which was launched on December 2, 1995. LASCO is now producing coronal images from all three of its coronagraphs. The Solar Ultraviolet Spectral Irradiance Monitor (SUSIM) experiment begun on October 11, 1991 aboard the Upper Atmosphere Research Satellite (UARS) continues to measure the solar UV spectral irradiance. The High Resolution Telescope and Spectrograph (HRTS) experiment has collected spectroscopic observations of the Sun while flying on suborbital rockets since its first flight in 1975.

NSI On-Line Network Aide - NONA

NSSDC Astronomy and Astrophysics Home Page

NSSDC's Astronomy and Astrophysics Home Page offers information about online data and services, including access to a WAIS-searchable index of more than 700 astronomical catalogs; high-level project descriptions for such projects as ASCA, ROSAT, EUVE, HST, and COBE; and links to many other popular astronomy and astrophysics resources.

NSSDC Photo Gallery

The images presented in the Photo Gallery have a number of different sources, primarily NASA missions, however. They are generally organized by object and/or phenomenon on separate pages. The source of the image as well as the processing involved in producing the image have been included whereever possible. Photo captions for some images are also available.

NSSDC's Online Data Information Services ( NODIS, at NSSDC )

NODIS is a login account available on NSSDC's VAX computer which provides menu-based access to data and information services provided by NSSDC and by the Space Physics Data Facility. NODIS is now being retired, since most of its services are now available via the World Wide Web (WWW).

Numerical Algorithms Group ( NAG )

NAG is a supplier of numerical, statistical, symbolic and visualisation systems plus compilers and tools.

Numerical Recipes

The Numerical Recipes (NR) books are developed by Numerical Recipes Software and published by Cambridge University Press (CUP).
Thanks to special permission from Cambridge University Press, the complete Numerical Recipes books in C, Fortran 77, and Fortran 90 On-Line, are available on-line, free, in both PostScript and PDF formats.

NUNES, Ana Sofia ( University of Lisbon )