... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

. JANUARY, 2004 . 22 . 23 . 31 . FEBRUARY, 2004 . 12 . 17 . 19 . 20 . 21 . 27 . MARCH, 2004 . 05 . 06 . 10 . 11 . 12 . 15 . 17 . 18 . 19 . 29 . 30 . 31 . APRIL, 2004 . 01 . 02 . 03 . 04 . 07 . 09 . 10 . 12 . 14 . 15 . 19 . 22 . 23 . 26 . 27 . 28 . 29 . 30 . MAY, 2004 . 05 . 09 . 11 . 12 . 14 . 19 . 20 . 21 . 24 . 27 . 28 . 29 . 30 . 31 .

Active region 1158 let loose with an X2.2 flare late on February 15, the largest flare since Dec. 2006 and the biggest flare so far in Solar Cycle 24. Active Region 1158 is in the southern hemisphere, which has been lagging the north in activity but now leads in big flares. Here is a blowup of the flaring region taken by NASA's Solar Dynamics Observatory in the extreme ultraviolet wavelength of 193 Angstroms. ... NASA/SDO ...

... International astronauts are those individuals from international space agencies who have trained or served with NASA Astronauts. Astronaut assignments and category definitions (e.g., "active" astronauts, "management" astronauts) are contained in a separate Flight Operations Directorate (FOD) policy letter. Former astronauts are those who are no longer employed by their agency. Active and Management International Astronauts . Astronaut . ... Former International Astronauts . ...

... 9) Oknyanskij V.L. 1994, "Optical-radio time delays in Q0957+561", Odessa Astronomical Publ., ... 11) Oknyanskij V.L. 1994, "Connection between X-ray and optical variability in NGC4151", in Proceedings of Int. Conf. ... 1994. 12) Oknyanskij V.L. 1994, "Connection between X-ray and optical variability in NGC4151", Astrophys. and Space Science, 222, p.157. ... 14) Oknyanskij V.L., van Groningen E., 1997, "Optical spectral variability of NGC4151 in 1990", Astronomical and Astrophys. ...

. Assumed Source Spectra (2-10 keV): . Normal AGN: a x = 0.5, N H = 3 10 20 cm -2 . Absorbed AGN: a x = 0.5, N H = 3 10 23 cm -2 . An explanation of and further information on these predictions can be found here . Sky Area vs. flux limit (0.5 - 3.5 keV) . Sky Area vs. flux limit (2 - 10 keV) . Home | Science Goals | Survey Strategy | Publications | Images & Data | Education/Outreach | Internal Page (password access only) . Date Last Modified: 22 April 2002 . Contact: Webmaster .

e-mail: podgorny@inasan.ru . Institute of Astronomy RAS . ... Spectrum of solar flare protons // Journ. ... The active region magnetic flux correlation with flare appearance. ... Podgorny A. I., Podgorny I. M. Solar Flare Numerical Magnetohydrodynamic Simulation and Solar Flare Model. ... Podgorny A. I., Podgorny I. M. MHD simulation of magnetic field configuration above the active region NOAA. ... Podgorny I. М., Podgorny A. I. The active region magnetic field association with solar flares. ...

OptInt PmWiki : MROI Fast Tip Tilt / Tech Meet 8 . ... Attendees: JSY, DFB, EBS, MF, ADR . ... Thermal control . Scope of this software includes thermal control of camera enclosure . Thermal control should be active continuously, day and night . ... Separate process for thermal control (possibly with its own interface to the ISS) desireable, but requires dedicated I/O hardware . ... Printable View of http://www.mrao.cam.ac.uk/projects/OAS/pmwiki/pmwiki.php/MROIFastTipTilt/TechMeet8) ...

The Wideband Arecibo Pulsar Processor - SNAP Page . SNAP is an application that can process raw WAPP files. ... Both modes (SNAP and WAPP) process data in blocks of 2048 records. ... The plot window presents the WAPP data as different types of XY plots. ... The slider is used to select records in several display modes. ... The reference band is computed by simply averaging all 2048 data records. ... The plot window presents the WAPP data as different types of color intesity waterfalls. ...

MIR ORBITAL COMPLEX CONTENT . S.P. Korolev Rocket and Space Corporation Energia was the Prime Contractor for MIR Orbital Station, developer of the Core Module and the Station Modules, developer and manufacturer of the major systems supporting their on-orbit operation; responsible for the integrated electrical interface of the onboard systems and integrated ground electrical tests of the Station Modules; developer and manufacturer of the Soyuz and Progress space vehicles. ... Docking Compartment . ...