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... We can investigate projection of this distribution onto the celestial sphere in two ways: in terms of lines of constant SN frequencies per one square degree for all galaxies from the sample (Figure 36 ), and in terms of constant GW amplitudes at a given SN frequency per square degree (Figure 44 ). ... Figure 45: The sky distribution of the total supernova frequency from nearby galaxies in terms of lines of equal frequencies per square degree. ...

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• Effect of sources evolution on
• Seminars
• E-P transitions for different orbits

... 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. ...

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• The Sun
• Comet Shoemaker-Levy 9
• Pluto and Charon

The database contains references to the papers, data files and links to the Internet resources related to measurements and calculations of the optical constants in the wavelength interval from X-rays to radio domain. ... References to some useful books and reviews on the subject (e.g. the classical handbooks edited by E.D.Palik) and links to Internet collections of optical constants and personal WWW pages with related software were also placed in the database. You have arrived at our welcome page. ...

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• Vladimir P. Reshetnikov's Home Page

... Это первое изображение звезды, отличной от Солнца, полученное космическим телескопом. Звезда, называемая Aльфой Ориона (Бетельгейзе), отмечена крестиком на правом изображении зимнего созвездия Ориона (Охотника). На изображении показана огромная ультрафиолетовая атмосфера звезды с таинственным ярким пятном размером в десять раз большим диаметра Земли и имеющем температуру по-крайней мере на 2000 К больше температуры остальной поверхности звезды. ...

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• Scientific.ru Альтернативный форум
• Силуэт галактики
• Новости науки

This group of four pages describes how the Arecibo 430 MHz radar makes simple measurements in the ionosphere. ... Radar Reflections From the Ionosphere . ... Or How are radio and TV stations like radars?) ... Consider two radio stations located on a mountain transmitting to a nearby city. ... A radar is like a radio station, but it has a receiver that picks up radio waves reflected from objects (targets). ... Although a radio station transmits continously, a radar can transmit short bursts of waves. ...

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• New Results Confirm Dark Galaxy Existence
• rotaPlatToSky
• alfa C0,1az,3z cor. oct11

... 1) Studying distributions of stars of different ages in irregular and spiral galaxies we found for each galaxy a clear correlation between the age of stars and the spatial size of the subsystems of stars of this age. ... We made a stellar photometry of eight NGC 1313 fields and of its dwarf companion AM 0319-662 and studied the visible distribution of stars of different ages and of metallicity in the galaxy. ... This disappeared galaxy was the cause of the gravitational deformation of NGC 1313. ...

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• New LBV Stars in the Andromeda Galaxy
• Metagalaxy sector, archive 2001
• Catalog of the LV Galaxies

... ARTICLE: The Adventurous Search For The Astronomical Unit . ... Kepler himself had suggested to use the rare occasions of Venus transiting (crossing) the solar disk to measure our distance to the planet. ... Due to the orbital inclination of Venus against the ecliptic of 3.5°, a Venus transit is so rare that it happens only at intervals of 121.5 years, 8 years, 105.5 years, 8 years and so on. ... Crabtree witnessing the transit of Venus 1639 . ... Transits of Venus - The Quest for the Solar Parallax...

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• AAL Printout

DETERMINATION OF THE HUBBLE CONSTANT FROM THE GRAVITATIONAL STABILITY CRITERION OF THE GASEOUS DISKS, by A.V.Zasov, D.V.Bizyaev. ... Following proposition has been put forward: a total surface density of gas at radius $R_H$, where the mean densities of atomic ($\sigma_{HI}$) and molecular ($\sigma_{H_2}$) hydrogen are equal, corresponds (or proportional to) the critical gas density $\sigma_c$ for gravitational stability of gaseous disk. ...

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• Dm. Bizyaev's Publications
• Description of different types of shell
• Other interesting links

... Section M-7 describes the basic problem of trigonometry (drawing on the left): finding the distance to some far-away point C, given the directions at which C appears from the two ends of a measured baseline AB. ... That means that the angle ? ... 2? r covers an angle 360њ . ... Suppose you want to estimate the distance to some distant landmark--e.g. a building, tree or water tower. ... Alpha Centauri, the sun-like star nearest to our solar system, has a distance of 4.3 years and a parallax of 0.75"....

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• Trigonometry beyond 90 degrees
• Parallax--Lesson Plan #14
• Trigonometry--what it is good for?

Proceedings of the Particle Physics and Early Universe Conference (PPEUC). For this paper: postscript PPEUC CMB index 1 Introduction.. ... Combining measurements of the thermal Sunyaev--Zel'dovich effect with X-ray data allows calculation of a direct, physical estimate of Hubble's Constant ( ) without the need for distance-ladder-type arguments. ... 1 Introduction . ... 3 Calculating Hubble's Constant . 4 Errors In Determination of . ... PPEUC Proceedings . Fri Jun 27 15:29:33 BST 1997 ...

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• XXVIIth YERAC Preface

Next: Large Scale Clustering in the Universe - A Package of Codes . ... The discovery of a correlation between the light curve shape and intrinsic brightness has made Type Ia supernovae exceptionally accurate distance indicators out to cosmologically interesting redshifts. ... But supernovae are relatively rare events. ... Type Ia supernovae make excellent distance indicators, so these events at high redshift can be used to map out the history of the expanding Universe. ...

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