... I normally begin by asking the class what they think would be different if the Moon didn't exist, or if the Sun were closer to Earth, or if a star exploded nearby. ... The winds would be much stronger. ... In using what-if questions in the classroom, it is worth bearing in mind that students extrapolating the effects of new scenarios will encounter two different situations: direct changes to the new version of Earth and indirect changes resulting from the direct changes. ...

... 2011 September 7 . SDSS J102915+172927: A Star That Should Not Exist . ... Explanation: Why does this star have so few heavy elements? Stars born in the generation of our Sun have an expected abundance of elements heavier than hydrogen and helium mixed into their atmospheres. Stars born in the generation before our Sun, Population II stars , the stars that created most of the heavy elements around us today, are seen to have some, although fewer, elements heavier than H and He. ...

Astronomy Discussion Forums . ... What Really Exists Outside The Universe . ... Post Message | ... Picture a bowl of marbles. ... Each of the spheres in your marble bowl represents a single universe. Now in reality these marble spheres exist infinitly in numbers and are not limited to some sort of cosmic bowl. ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... specadd creates a multiple X-ray spectrum FITS file by stacking or putting together (``adding'') two single spectrum files. ... This type of spectral files is particularly useful when the user wants to simultaneously analyse different observations of the same object carried out with the same instrument or with different instruments. ... The Data extension for a multiple spectral dataset stores one single spectrum per row, instead of one channel per row as it is the case of single spectrum files. ...

Next: Format conversion Up: Reducing the observations Previous: Reducing the observations . Now you have your data, and are ready to reduce them. Table gives a list of the files you will need. ... If you need to make supplemental standard-star files, refer to the ``Standard-star files'' subsection at the end of section . ... If you were able to find additional information about the instrument while you were observing, be sure to add any missing information to the instrument file. ...

... Multiverses: Do Other Universes Exist? ... If one or more of the multiverse hypotheses is correct, then quite possibly they do. In the above computer-enhanced illustration , independent universes are shown as independent circles or spheres . ... An entire set of parallel universes is called a multiverse . The human eye might represent the possibility that realizations of some multiverse hypotheses might only exist in the human mind . ... Publications with keywords: universe - cosmology . ...

... We also identified two other spectrally unique terrains, corresponding to the northern polar ice cap, and to the southern winter polar hood. Comparisons with mineral spectra indicate the possibility of different H 2O- or OH-bearing (i.e., hydroxides and/or hydrates) minerals existing both in northern Acidalia and in the nearby intermediate albedo terrain. Hydrated minerals do not appear to be spectrally important components of the southern hemisphere dark terrains imaged by HST in 1997. ...

Program: PLATE Purpose: snips raw data from tape(s) to custom plate Category: IRAS Author: Do Kester File: plate.src Keywords: INSTRUME= give instrument identification [] a combination of observation mode SURVEY SPLINE AO PO FLASH UNKNOWN and band number 12 25 60 100 LRS BPHF 1 2 3 4 ( 2 letters suffice ) PO is an alias for AO; AOs, POs and UNKNOWNs are collectively known as pointed observations. ... Only scan(snip)s which pertain to the same area and instrument can be stored in the same IRDS. ...

... A Meeting in Honor of the 65th Birthday of Carl Heiles . ... GENERAL MEETING INFORMATION . Diffuse interstellar material (ISM) occupies the vast majority of space in our Galaxy and in others. ... Therefore, it was most fitting to honor Carl, a distinguished researcher and an inspiring professor, with a meeting dedicated to observational and theoretical studies of the diffuse ISM. Along with this symposium, the 3rd Galactic ALFA (GALFA) Consortium meeting was held on August 29, 2004. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... The low-resolution, Cassegrain mounted, FORS spectropolarimeter of the ESO Very Large Telescope is being extensively used for magnetic field surveys. Some of the new discoveries suggest that relatively strong magnetic fields may play an important role in numerous physical phenomena observed in the atmospheres as well as in the circumstellar environments of certain kinds of stars. ...

... This appartus will drop a mass from different heights. When the mass strikes the ground, some percentage of its original energy will be absorbed by the ground. ... The percentage of the energy which is absorbed by the surface on each "bounce" (EAS) . ... The impact velocity of the object will also be given at each bounce. ... Start= Drop the ball after Energy, Mass and EAS have been set; resume after step or pause has been selected . ... Reset = Reset experiment to intial values . ...

... But according to astronomers, the star that the arrow is pointing towards shouldn t be there it should never have been born. ... Stars are usually made from a wide selection of different types of tiny things called atoms, such as hydrogen, helium, carbon and oxygen. ... Hydrogen and helium atoms formed shortly after the Universe began with the Big Bang. ... Since this star only contains hydrogen and helium, astronomers think that it might have been born not long after the Big Bang. ...

. filename : Cross-device link . The file you are trying to make a link to is located on a different physical device. The solution is to create a symbolic link . directory_name is a directory . You are trying to make a link to a directory. Check the pathname for the file. ln: filename : File exists . A file with the same name as the linkname already exists in the destination directory. Use a different name for the linkname.

OptInt PmWiki : Pm Wiki / Access Keys . ... On Windows with Internet Explorer, press ALT + the access key. With Firefox, press SHIFT + ALT + the access key. ... Example: <a href="http://example.com" accesskey="x">Example</a> would create a link to example.com that could be triggered by clicking on the linked word "example" or using the access key Akey+x. That same action key link could be created in PmWiki markup by typing %accesskey="x"%[[http://example.com|Example]]%% , like this: Example . ...

... Tonight's Sky . ... Sky this Month . ... An artificial comet holds secrets to Earths life . ... Early Mars bombardment likely enhanced life-supporting habitat . ... The Real Reality Show: Would aliens be anything like us? ... April 2016: the historic journey to Europa . The Real Reality Show: All about the Drake Equation . ... The Real Reality Show . ... The Real Reality Show: Could Life Exist on Europa or Titan? ... Only registered members of Astronomy.com are allowed to comment on this article. ...

chandra_acis_ao9.par ; generate an ACIS spectrum for a source using a DEM , ; and optionally rescale the DEM to produce the same ; counts as a ROSAT / PSPC observation ; ;calling sequence ; .run initale ; @chandra_acis_ao9.par ; ;(LL/VK; modified from chandra_acis_ao5.par, Feb04) ;(LL ... density [cm^-3] T_components = [6.9, 7.4] ;log(T[K]) components in the EM EM_components = [5.1d12, 6.1d12] ;Emission Measure [cm^-3] obs_rate = 0.1 ; ROSAT / ...

Atmospheric influence on the different radio-engineering system functioning . ESTIMATION OF ATMOSPHERIC OPTICAL CHARACTERISTICS AND REMOTELY SANSED IMAGE CORRECTION . ... Direct transmittance estimation results for 12 channels of the spectrometer CHRIS. ... We have managed to develop a direct method of estimating the discrete Normalized Atmospheric Point Spread Function (NAPSF) from available images alone, not using any external sources of information about the atmosphere. ... IRE RAS 1996-20 11 ...

Last updated 22 October 2004 by JCB . Width (arcsec) Location Material Note 0.9 DIS Steel 1.0 3.5m Storage Quartz 1.1 ?? 1.2 DIS Steel 2.0" occulting bar; unpolished near edges 1.5 DIS Steel 1.6 ?? Does this slit really exist?) ... Does this slit really exist?) 2.0 3.5m Storage Quartz 5.0 DIS Steel NOTES: 'Locations' were as of October 2004. DIS" refers to slits which remain permanently availablein the so-called default slit wheel. ...

SINCom - the new program package for combined processing of space geodetic observations O. Brattseva, I. Gayazov, S. Kurdubov, V. Suvorkin IAA RAS, Saint Petersburg, Russian Federation, ipa@ipa.nw.ru The SINCom software package is developed for combined processing of different space geodesy observations. ... Header line) +(BLOCK TITLE) .. ... Further iterative improvement of satellite orbit parameters is also possible - single-technique combination ("horizontal" scheme) of daily solutions. ...

Storing and accessing the largest astronomical catalogues with the SAI CAS project S. Koposov1,2,3, O. Bartunov2, S. Karpov4 et al2. ... Why we want to build our own Catalogue Access Service The requirements for our CAS system The importance of the Database for the CAS (PostgreSQL & Q3C) The technical realization of CAS What has been already done Example of work TODO Storing and Accessing Astronomical Catalogues Existing projects CDS OpenSkyQuery CASjobs with SDSS They are all really great! ...