Saturday, 28 August 2010

Rocket Wind Tunnel

Audience: Educators
Grades: 3-12

Build a wind tunnel that your students can use to test their rockets. Air rockets are placed inside a wind tunnel, and their resistance to the flow of air in the tunnel is measured in tenths of grams. Students will use data generated in the wind tunnel to help them design better rockets.

Rocket Wind Tunnel   [803KB PDF file]

This activity is part of the Rockets Educator Guide.

Sunday, 22 August 2010

Faraday's Cage

MIT Physics Demo

In the electric field of a Van de Graaff generator, an unprotected Ben Franklin feels electrostatic forces. However, when a metal cage surrounds him, he is completely shielded against any electricity or electrostatic force. This is due to the fact that all charges in a conductor reside on the outer surface, and always rearrange themselves to cancel out the electric field in the interior.

Wednesday, 18 August 2010

Laboratorium Astrofisika

Astrophysics Laboratory

Apa gunanya tangan kalau tidak dipergunakan, apa juga manfaat tangan kalau dipergunakan untuk kemaksiatan,

Mata itu umpama satelit, sekali-kali jangan salah dipergunakan

 Mujahid Cinta

Harvard-Smithsonian Center for Astrophysics
60 Garden Street, Cambridge, MA 02138




Professor John M. Kovac, Dr. Thomas Dame, and members of the Department. 



Harvard College/GSAS: 3615
Spring 2011; limited to 16

First meeting: Wednesday, Jan 26, 2 PM *
Observatory Pratt Conference Room


Charles R. Alcock

Charles Roger Alcock

England Windsor, England
Education California Institute of Technology
Occupation Astrophysicist
Years active 1977 – present
Known for
Center for Astrophysics

Prof. Dr. Charles Roger Alcock, Ph.D. (born 1951 in Windsor, Berkshire, England)

Laboratory and observational projects in astrophysics, carried out with the research facilities of the Harvard-Smithsonian Center for Astrophysics. Teams of two students perform two research projects during the course. Telescopes that may be used include the Submillimeter Array, the CfA millimeter-wave telescope, the Clay Telescope, and the heliostat at the Science Center. Laboratory projects include development of hard X-ray imaging detectors, testing of superconducting submillimeter detectors, and millimeter-wave laboratory spectroscopy.

Intended primarily for concentrators in Astronomy and Astrophysics or combined concentrators with Physics. Students with Physics as their primary concentration, but with a serious interest in astrophysics, may take this to satisfy their laboratory requirement (in lieu of Physics 191) upon petition to the Head Tutor in Physics.

Prerequisite: Astronomy 16 or 17, or Physics 15c or equivalent.

*NOTE: Only the first meeting is on Wednesday at 2 PM. Most subsequent meetings are arranged by the 2-student teams and their instructors, so course conflicts are rarely an issue. See the General Information page for the times and dates of the other group meetings.

Astronomy 16 or 17, or Physics 15c or equivalent. The course is intended primarily for concentrators in Astronomy and Astrophysics or combined concentrators with Physics.


Students work on an experiment in pairs but must submit individual written reports on each of two experiments performed during the term. Students must also give presentations on their experiments on March 9 and April 27.

The report (20 pages or less) should be modeled after a scientific journal article. It should contain an introduction which reviews the basic scientific principles behind the experiment and its astrophysical relevance, a section describing your preparation for and execution of the experiment, a section on your analysis and interpretation of the data, including a discussion of instrumental and possible systematic errors, and a conclusion discussing what was learned and how the experiment might be improved or followed up on. Figure captions and a reference list should also be included.

Presentations (15 minutes for a team of two students) should basically follow the same organization as the paper, with one student perhaps giving an introduction and description of the experiment, and the other describing the data analysis and results. A progress report on your analysis will be acceptable if the experiment was performed just a few days before. Proper timing of the presentation is very important since they will be strictly limited to 15 minutes.

Hours will vary with the experiment; some will require one or two late-night or overnight observing sessions.
The first experiment should be completed by the day of the first presentations, March 9, and the first report is due on March 28. The second experiment should be completed by April 27, the last day of classes, and its report is due on May 5. 

Required Textbook

Data Reduction and Error Analysis for the Physical Sciences
Third Edition, 2003
Philip R. Bevington & D. Keith Robinson
Boston : McGraw-Hill.
Available from the Harvard Coop

General Meetings

All general meetings are held in the Pratt Conference Room at the Center for Astrophysics.
Wednesday, Jan. 26, 2-4 PM: Organizational meeting
Wednesday, Mar.  9, 1-4 PM: Student presentations
Wednesday, April 27, 1-4 PM: Student presentations
All other meetings are arranged by the 2-student teams and their instructors. 

Course grade will be based on lab work (30%), oral presentations (20%), and the written reports (50%).

Useful Link

Tuesday, 17 August 2010

Indonesian University Space Research Association

Indonesian University Space Research Association

Persatuan Universitas Riset Antariksa di Indonesia

IUSRA is an independent, nonprofit research corporation where the combined efforts of in-house talent and university-based expertise merge to advance space science and technology. 

STRENGTHS & CAPABILITIES Today and Future, IUSRA works across a wide spectrum of disciplines stemming from the range of challenges originally posed by the space program. From biomedicine to astrophysics, from basic research to facility management and operations, IUSRA is helping enable the study of the Universe from ground, airborne, and orbiting observatories, the study of Earth from space-based platforms, the development of advanced technologies for complex spacecraft, the human exploration of space by astronauts, and much more.

The IUSRA business paradigm is to engage the creativity and authoritative expertise of university faculty and their students and deliver to customers sophisticated, forward-looking solutions, on schedule and within budget.

IUSRA objectively focuses on sponsor needs in these key areas:
 * Fundamental Research
 * Engineering & Technology Development
 * Operations & Management
 * Workforce Development

Universities are also a part of IUSRA's governance structure. 500 universities, all major research institutions, provide oversight solely as a public service. All IUSRA activities are conducted without bias or preference.

Sunday, 15 August 2010

Neutrino radiation from dense matter

Armen Sedrakian
Institute for Theoretical Physics,
T¨ubingen University, D-72076 T¨ubingen, Germany
February 5, 2008
This article provides a concise review of the problem of neutrino radiation from dense matter.
The subjects addressed include quantum kinetic equations for neutrino transport, collision integrals
describing neutrino radiation through charged and neutral current interactions, radiation rates from
pair-correlated baryonic and color superconducting quark matter.

Thursday, 12 August 2010

Evolution of spiral galaxies in modified gravity

By: O. Tiret and F. Combes
Observatoire de Paris, LERMA, 61 Av. de l’Observatoire, F-75014, Paris, France
Received 26/09/2006/ 08/12/2006


We compare N-body simulations of isolated galaxies performed in both frameworks of modified Newtonian dynamics (MOND) and Newtonian gravity with dark matter (DM). We have developed a multigrid code able to efficiently solve the modified Poisson equation derived from the Lagrangian formalism AQUAL. We take particular care of the boundary conditions that are a crucial point in MOND. The 3-dimensional dynamics of initially identical stellar discs is studied in both models. In Newtonian gravity the live DM halo is chosen to fit the rotation curve of the MOND galaxy. For the same value of the Toomre parameter (QT ), galactic discs in MOND develop a bar instability sooner than in the DM model. In a second phase the MOND bars weaken while the DM bars continue to grow by exchanging angular momentum with the halo. The bar pattern speed evolves quite differently in the two models: there is no dynamical friction on the MOND bars so they keep a constant pattern speed while the DM bars slow down significantly. This
affects the position of resonance like the corotation and the peanut. The peanut lobes in the DM model move radially outward while they keep the same position in MOND. Simulations of (only stellar) galaxies of different types on the Hubble sequence lead to a statistical bar frequency that is closer to observations for the MOND than the DM model. Key words. Galaxies: general — Galaxies: kinematics and dynamics — Galaxies: spiral — Galaxies: structure — Cosmology: dark matter 

Tuesday, 10 August 2010

Olimpiade Astronomi Internasional

The International Astronomy Olympiad (IAO) is an internationally recognized annual astronomy scientific-educating event for high school students (14–18 years old), which includes an intellectual competition between these students. It is one of the International Science Olympiads.
The Eurasian Astronomical Society founded the IAO in 1996.

Competing Rounds

The competing part of IAO consists of three rounds: a theoretical, an observational, and a practical. Problems of the theoretical round involve classical problems in branches of astronomy, astrophysics, space and planetary physics, and maybe hypothetical situations. The observational round involves recognizing stars, constellations, estimating star magnitude and angular distance, working with telescopes or other observational technique. The practical round consists of problems based on data results of observations, solutions propose analysis of these data. The chairman is Michael Gavrilov.

Indonesian  Astrophysics Association on Education

Pusat Pengembangan Kompetisi Olimpiade 

Astronomi dan Astrofisika




The International Astronomy Olympiad Web Site

Saturday, 7 August 2010

Applying Newton's Laws

Audience: Educators
Grades: K-12

This document focuses on how rockets work, including the rocket engines and their propellants.

Applying Newton's Laws  [763KB PDF file]

Applying Newton's Laws is part of the Rockets Educator Guide.

Thursday, 5 August 2010


Biophysics is an interdisciplinary science that uses the methods of, and theories from, physics to study biological systems. Biophysics spans all levels of biological organization, from the molecular scale to whole organisms and ecosystems. Biophysical research shares significant overlap with biochemistry, nanotechnology, bioengineering, agrophysics and systems biology.

Sunday, 1 August 2010

Indonesian Astrophysics Association

Indonesian Astrophysics Association 

The mission of the  Indonesian Astrophysics Association (IAA) is to advance our knowledge and understanding of the universe through research and education in astronomy and astrophysics. 
Indonesian  Astrophysics Association on Education

Pusat Pengembangan Kompetisi Olimpiade 

Astronomi dan Astrofisika




The International Astronomy Olympiad Web Site

  • 2nd International Olympiad On Astronomy and Astrophysics Part I

  • 2nd International Olympiad On Astronomy and Astrophysics Part II

  • Astrophysics (Greek: Astro - meaning "star", and Greek: physisφύσις - meaning "nature") is the branch of astronomy that deals with the physics of the universe, including the physical properties of celestial objects, as well as their interactions and behavior. Among the objects studied are galaxies, stars, planets, exoplanets, the interstellar medium and the cosmic microwave background. Their emissions are examined across all parts of the electromagnetic spectrum, and the properties examined include luminosity, density, temperature, and chemical composition. Because astrophysics is a very broad subject, astrophysicists typically apply many disciplines of physics, including mechanics, electromagnetism, statistical mechanics, thermodynamics, quantum mechanics, relativity, nuclear and particle physics, and atomic and molecular physics. In practice, modern astronomical research involves a substantial amount of physics. The name of a university's department ("astrophysics" or "astronomy") often has to do more with the department's history than with the contents of the programs. Astrophysics can be studied at the bachelors, masters, and Ph.D. levels in aerospace engineering, physics, or astronomy departments at many universities.