... The greater the distance, the smaller the parallax. ... That triangle has the same proportions as the much larger triangle ABC, and therefore, if the distance B'C to the thumb is 10 times the distance A'B' between the eyes, the distance AC to the far landmark is also 10 times the distance AB. ... The most distant objects our eyes can see are the stars, and they are very far indeed: light which moves at 300,000 kilometers (186,000 miles) per second, would take years, often many years, to reach them. ...

... My mother had a 'star named for me' with the International Star Registry (henceforth ISR) as a gift for this Christmas. ... On the back of the chart, a sticker described the precise location and visual magnitude of the star, taken from the Hubble Guide Star Catalog. The first thing I noticed, was the chart was Epoch 1950. ... The coordinates were also exactly those on the ISR sticker, so I now knew that even though the ISR chart was epoch 1950, the coordinates on the sticker were epoch 1983. ...

... 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...

Program "М ariner ": Research of Mars. ... Маriner-8" and "Маriner-9", started in 1971, were put into orbit around of Mars, in order to receive and transmit the information, including photos, during one month, instead of several days. ... Satellites of Mars Phobos and Damos there are less than moon. The nature of satellites of Mars remains not clear, but on photos "Маriner-9" it is possible to assume that either Phobos, or Damos are stone monoliths. ...

... To get access to the software you must be registered at the ASC RadioAstron Server "ra.asc.rssi.ru" ------------------------------------------------------ IMPORTANT: At present the software "FAKERAT" runs only under 32 bit Linux workstation in X windows with C shell script. ... All procedure runs under C shell. ... Copy all files from the given directory to your computer. ... Then, copy txt-file representing the current version of orbit to the "orbit" subdirectory located in "fakerat_07041020". ...

... Обзор LPR фильтра. Впечатления от наблюдений с LPR фильтром. ... Характеристики цветных фильтров Baader-Planetarium . Мой перевод pdf- файла о фильтрах с сайта Baader-Planetarium (379 кб) . ...

Scale-heights of the Galactic disk subsytems with different ages and metallicities . V.Marsakov & Yu. ... It is based on the fact, that all stars cross the disk plane several times during their Galactic orbital period. ... We have used our representative sample of nearby disk F2-G2 stars Marsakov & Shevelev (1995) in which fundamental stellar parameters was determined on the basis of published date on uvby-photometry, proper motion and radial velocities. ... Marsakov V.A., Shevelev Yu.G. Bull. ...

. home . product . gallery . contact .