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What is the VSM ? ... VRML = Virtual Reality Modeling Language. ... One of the best VRML viewers, if not the best, is Netscape Navigator with Live3D plugin. ... Warning: if you use any other viewer, spacecraft will probably look like parrots or clowns because each VRML viewer treats colors in its own unpredictable way. ... You can use these VRML models freely in any way you like, but: 1) let me know you use them; 2) if you add them to your Web page, a reference to the VSM must be there. ...

... 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...

... Официальное зеркало Astronomy picture of the day на сервере NASA ?? ... написанным профессиональным астрономом . ... Слухи о странной Вселенной . ... Во-первых, энергия, связанная с лямбда-членом, очень непохожа на другие известные составляющие Вселенной, во-вторых, наблюдения накладывают жесткие ограничения на возможные значения космологической постоянной , и, наконец, для объяснения ранее полученных данных вполне успешно применялись гораздо менее странные космологические модели без лямбда-члена. ...