... Bad Astronomy . ... Bitesize Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... It's semi-common knowledge that stars twinkle and planets don't. By semi-common, I mean that a lot of folks know that, but I also mean it isn't strictly true. Stars twinkle because we see them from the bottom of a sea of air. ... These small bundles of air act like little lenses, bending light as it passes through them. ... What we see is the light from the star flickering. ...

... The Third Catalog of Emission Line Stars (Herbig & Bell 1988) and the General Catalog of Herbig-Haro Objects (Reipurth 1994) have both been translated into hypertext and linked to other on-line material. ... In recent years astronomical catalogs have disappeared from the archival literature. ... This spring I received a request from Bo Reipurth of ESO to review his preliminary General Catalog of Herbig-Haro Objects (Reipurth 1994) before it was made available via anonymous FTP from the ESO FTP...

The perturbation method is based on the small-parameter expansion of an unknown solution of the light scattering problem in a vicinity of the exact solution. ... The only probably exclusion is the case of anisotropic particles for which the rigid solution is either impossible or too complicated. For such problems the perturbation method can give information of the first approximation, which is important for understanding of the basic principles of influences of the material anisotropy. ...

. 7.16. On the right: Dr C. Anantaram . He invited us to this small Hindu restaurant. 7.17. 7.18. Actually, it was a small banquet devoted to the Semantic Web workshop. I am very interested in the Semantic Web approach, but, frankly speaking, I don't like XML at all. From my point of view, XML is a delayed-action mine under the Semantic Web. Return to the main page .

StarShine-3: . ... The satellites are covered by nearly 1000 small, front-surface aluminum mirrors that are machined by technology students in Utah and polished by tens of thousands of students all over the world. ... And this is only small story about it. ... We will be able to measure the angular position of that satellite by observing sunlight flashes from small mirrors mounted on the surface of the satellite, as it passes across the starry sky before sunrise and after sunset.. ... Starshine 3 . ...

... Submitted by Paul Benni on 11/27/2013 18:54:38 . Exoplanet transit HAT-P-20b . This is a photometry measurement of a hot Jupiter transit across a star slightly smaller than the sun originally posted on the Exoplanet Transit Database (ETD) http://var2.astro.cz/ETD/index.php. ... Since my first exoplanet transit (Wasp-3b) posted earlier, I successfully recorded 70+ exoplanet transits with C11 and C8 SCTs, which can be found on ETD. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... astro-ph . ... SAI VO . ... Whitespace-separated words are treated as AND ed. Show 10 50 100 articles per page in Full Compact mode . Normalized to: Small, T. 86 article(s) in total . 286 co-authors, from 1 to 73 common article(s). ... Cooper, Michael C.. ... Forster, Karl. Foster, Karl. ... Gilbank, David G.. ... Glazebrook, Karl. ... Hopkins, Andrew M.. ... Kim, Alex G.. Kim, Mi Kyoung. Kim, S. C.. ... Lee, J.. ... Rich, M.. Rich, R. Michael. ... Salim, R. Michael Rich Samir. ...

... Spherical aberration, coma, and astigmatism are also easily observed using the star test. ... Off-axis images are complex. ... Fig. ... Diffraction by a circular aperture as a function of defocus for no aberration Airy Disk 1 wave defocus Less than 1 wave defocus Fig. ... Diffraction by a circular aperture as a function of defocus for third-order spherical aberration Paraxial Focus Small distance inside paraxial focus Moderate distance from marginal focus Immediate neighborhood of marginal focus Fig...

... For example, precision of the approximation was calculated for Solar system and 47 Uma star system Kepler orbital elements : Jupiter Saturn 9.537 0.0539 Uranus 19.189 0.0473 Neptune 30.070 0.0086 47 Uma b 2.10 0.032 0.10 3.76 5.83 0.89 47 Uma c 3.60 0 ... rad , rad , rad l, rad 0.0228 1.754 4.801 0.328 0.0434 1.983 5.865 5.591 0.0135 1.291 1.685 2.495 0.0309 2.300 4.636 4.673 Kepler elements for Solar ... Estimation accuracy of disturbing function (h1) expansion is presented. ...

... Photos . ... Small castles near the autobahn in Austria . ... Venice . ... Munich . ...

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