|
Rockets, satellites, planets and solar system explorations, dark matter and
black holes. People, space shuttle, ISS
and telescopes discovering the universe.
Launcher
Home
Astrophysics
Headlines - Space.com
IMO
ISS
Missions
NAMN
People
Rockets
Satellites
Science Projects
SETI
Solar System
Space Shuttle,
Spaceships
Space Tourism
Stars
Telescopes
NASA Centers
Centers List
Deep Space
Network
Education Sites
Field Centers
Goddard
HEDS: Space Flight
Johnson
Kennedy
Liftoff to Space
Marshall
NASAexplores
Origins Program
Organizations
R&T Reports
Science@NASA
SEDS
Space Camp
SpaceKids
Space Lab: NOAA
Space Library
SpaceLink
SpaceWeather.com
Stennis
Related:
British National Space
Canadian Space Agency
Chabot Space & Science
Comments
ISAS
ESA
Feedback
Free Update
Los Alamos Space Center
Natural Science
Space Adventures
Space Explorers, Inc.
Submissions
UK - SECIS Online
Research Sites:
Ames
Calgary ISR
Dryden
DSRI
ESTEC
ETL
Glenn
Hiraiso Solar
Icing Tunnel
IKI
INPE
ISRO
JGR
JHUAPL
Langley
MIT
MSSL
New Wave
NSBRI
SPARC
Texas Space
University of Leicester
USRA
White Sands
For questions concerning this site, contact
webmaster.
When space makes you dizzy:
Landing a spaceship is not a good time for a pilot to feel
dizzy.
It's easy to tell which way is up and which way is down...or
is it? In the freefall of space travel, there's no pull of gravity to tell your body which way is which. Most astronauts and cosmonauts experience some motion sickness when they first arrive in orbit. NASA is studying why.
Download sound files of the sun from Stanford's Solar Center: The Singing Sun.
Go to theBBC SPACE Science Homepage & Weather Page for space events and forecasts.
View NASA Kids Toon for animations on NASA, space missions and science.
|
|
|
Learning about astrophysical jets in the lab
by APS at the 44th Annual Meeting of the Division of Plasma Physics
Many astronomical objects, from galactic nuclei to black holes surrounded by accretion disks, emit very long plumes of plasma, called astrophysical jets.
False-color images of laboratory plasmas taken with a high-speed digital camera. Development of (a) jet-like structure and (b) helical instability in the jet structure. (Concentric electrodes appear on right hand side of each image.)
In a new laboratory plasma experiment, Caltech researchers show how magnetic forces can create these jets. Magnetic forces squeeze the plasma into a narrow plume and eject this plume along the axis, forming a jet-like structure. These results should help to shed light on the long-standing problem of how jets are formed.
In the experiment, up to 150 kilo-Amperes of electrical current (tens of thousands of times the current from a wall socket) are run through a hydrogen plasma inside a cylindrical metal chamber the size of a large closet. Some of the jet-like plumes show a spiral structure (see photos) similar to what is occasionally observed in space. By studying the process of jet formation in the lab, researchers will be able to improve understanding of real astrophysical jets.
Contacts
Paul Bellan, Caltech, 626-395-4827, pbellan@caltech.edu
Scott Hsu, Caltech, 626-395-3985, scotthsu@caltech.edu
|
|
|
Please visit our
affiliate partners that
keeps our site up.
|
|
|
