Friday, March 15, 2013

Our Galaxy's "geysers" are towers of power

"Monster" outflows of charged particles from the centre of our Galaxy, stretching more than halfway across the sky, have been detected and mapped with CSIRO's 64-m Parkes radio telescope.
  • 3 January 2013



The outflows were detected by astronomers from Australia, the USA, Italy and The Netherlands. They report their finding in today's issue of Nature.
"These outflows contain an extraordinary amount of energy — about a million times the energy of an exploding star," said the research team's leader, CSIRO's Dr Ettore Carretti.
"These outflows contain an extraordinary amount of energy — about a million times the energy of an exploding star."
Dr Ettore Carretti, CSIRO Astronomy and Space Science
But the outflows pose no danger to Earth or the Solar System.
The speed of the outflow is supersonic, about 1000 kilometres a second. "That's fast, even for astronomers," Dr Carretti said.
"They are not coming in our direction, but go up and down from the Galactic Plane. We are 30,000 light-years away from the Galactic Centre, in the Plane. They are no danger to us."
From top to bottom the outflows extend 50,000 light-years (five hundred thousand million million kilometres) out of the Galactic Plane.
That's equal to half the diameter of our Galaxy (which is 100,000 light-years — a million million million kilometres — across).
Seen from Earth, the outflows stretch about two-thirds across the sky from horizon to horizon.
The outflows correspond to a "haze" of microwave emission previously spotted by the WMAP and Planck space telescopes and regions of gamma-ray emission detected with NASA's Fermi space telescope in 2010, which were dubbed the "Fermi Bubbles".
The WMAP, Planck and Fermi observations did not provide enough evidence to indicate definitively the source of the radiation they detected, but the new Parkes observations do.
To finish reading article CLICK HERE 


Friday, August 3, 2012

Mission Mars - Curiosity flying to the red planet


                   

                                      CLICK HERE TO READ UPDATE ON ROVER 

                                                 
                                      CLICK HERE TO READ UPDATE ON ROVER

http://www.ustream.tv/ 

                    

Saturday, June 23, 2012

Voyager 1 At The Final Frontier

At the edge of the solar system, Voyager 1 is reporting a sharp increase in cosmic rays that could herald the spacecraft's long-awaited entry into interstellar space.

                



Credit: Science@NASA




In the early 2000s many new, relatively large planetary bodies were found beyond what was at the time planet Pluto, and with orbits extending hundreds of AU out past the heliosheath (90-1000 AU).

The NASA probe New Horizons may explore this area after it performs its planned Pluto flyby in 2015 (Pluto ranges from about 29-49 AU). Some of these large objects past Pluto include, Eris (136199), Haumea (136108), Makemake (136472), and Sedna (90377). Sedna comes as close as 76 AU, but travels out as far as 961 AU at aphelion, and minor planet 87269 goes out past 1060 AU at aphelion. Bodies like these have an impact on how the Solar System is understood, and traverse an area previously only in the domain of interstellar missions or precursors probes.

After the discoveries, the area is also in the domain of interplanetary probes; some of the discovered bodies may become targets for exploration missions,an example of which is preliminary work on a probe to Haumea (136108) and its moons (at 35-51 AU). Probe mass, power source, and propulsion systems are key technology areas for this type of mission.

Read more CLICK HERE

Tuesday, May 1, 2012

Hi this is Johnny Wheelock
I love the Hubble website I get such joy looking at the universe and all the Galaxies !  

                                 Gaseous Bubble in Core of Galaxy NGC 3079
Source: Hubblesite.org

Government Organization
Hubble captures images of cosmic wonders and sheds light on many of astronomy's greatest mysteries. For more, visit http://hubblesite.org/ like us on FaceBook

Wednesday, March 14, 2012



                   





  • In the show description above, I paraphrase "a long, long time ago in a galaxy far, far away," which is, of course, from the opening of the movie "Star Wars." It serves as a nice touchstone for the public that is, coincidentally, scientifically accurate. If a galaxy is far, far away, then any news we have about it could only be from long, long ago. In fact, given the large spiral galaxy shown in one of the ending shots of "The Empire Strikes Back" (a shot that is definitely NOT scientifically accurate), the adventures of Luke, Han, and Leia must have taken place at least several million years ago. But I doubt George Lucas knew his opening line was scientifically correct. After all, he didn't know that a "parsec" is a unit of distance, not time.
  • The initial press release for the Hubble Deep Field (HDF) in January 1996 states that the image contains "at least 1,500 galaxies." This number was the result of rather quick image processing and analysis, as the observations had only been completed about two weeks prior. Later, improved study revealed the number of objects in the HDF to be closer to 3,000. Why the rush? The American Astronomical Society (AAS) holds their winter meeting &mdash one of the best events at which to publicize a major result &mdash each January. Also, the HDF data was shared immediately with the entire astronomical community, and the AAS meeting was the perfect time to get the word out.
  • The concept of "out in space equals back in time" is a fundamental part of thinking like an astronomer. It can, however, lead to some confusion in dating events like supernova explosions. Supernova 1987A was observed on Earth in 1987, but, since the explosion took place in the Large Magellanic Cloud (LMC), the event really occurred about 170,000 years earlier. One tries to be careful to differentiate between the date it was observed and the date it exploded, but it is easy to slip. Just think, if supernovae occur about once a century, there are about 1700 stellar explosions that have already occurred in the LMC, but which we have yet to see. Going further, most of the major astronomical discoveries of the rest of our lives have already happened, and astronomers are just waiting for the light from those distant objects to reach us. That's thinking in terms of space-time.
  • Here at STScI, we produced an IMAX short film called "Hubble: Galaxies Across Space and Time."
    The film explores the Great Observatories Origins Deep Survey (GOODS) and highlights the changes in galaxy shapes with distance, and therefore time. The film features a journey into the GOODS image with all the galaxies placed at their correct relative distances based upon their measured redshifts. One thing to note is that the distances in the film are compressed by a factor of several hundred to make a better film shot, but otherwise the visuals are all Hubble data. We created a similar journey into the Hubble Ultra Deep Field for the IMAX film "Hubble 3D."