... Alfa_ang is a GUI for the rotang routine. The purpose of this routine is to calculate the optimum rotation angle for ALFA given the RA and Dec of a source and the date and time of the observation. The routine also returns the azimuth and zenith angle of the telescope at the requested time, thus it can be used to find the correct rotation angle and azimuth for the Fixed Azimuth Drift Scan observing mode used by the AGES drift precursor observation. ... To run alfa_ang at Arecibo: . ...

... Analysis of the WFPC2 saturated star images indicate that the large angle scattering (>3" from a star) is significantly higher than expected. ... The first set was from the SMOV Ghost Check proposal 5615, in which 100 second images of d Cas (V=2.7) were obtained at the center of each chip in F502N. The second set was a series of 6 second exposures of Vega (V=0.0) centered on WF2 through F410M (WFPC2 GTO proposal 5205). ... The source of the WFPC2 scattering may be the CCDs. ...

... 2004. ... Carbonneau P., Dikpati M. Stochastic fluctuations in a Babcock-Leighton model of solar cycle // Astrophys. ... Erofeev D.V. An observational evidence for the Babcock-Leighton dynamo scenario. ... Langcope D.W., Fisher G.H. The effect of convection zone turbulence on the tilt angles of magnetic bipoles // Astrophys. ... Dikpati M., Charbonneau P. A Babcock-Leighton flux transport dynamo with solar-like differential rotation. ... Axial tilt angles of sunspot groups // Solar Phys. 1999. ...

... Recent Topics . ... Forum . MAO main . Info . Definition of Polarization Angle . info . ... От: "Claus Leitherer" . ... Тема: Definition of Polarization Angle . ... Please take note of the attached IAU recommendation concerning the definition . of the polarization angle in astronomical measurements. ... www.mao.kiev.ua/images/postbyemail/Polarization.pdf . ... Board Categories MAO main - Info - MAO - news - Flame Technical - Technical Support(Forum)(Техподдержка(Форум)) . ...

... 3a. Angle . of sunlight . ... The Moon (1) . ... 4b. Moon Libration . ... The apparent path of the Sun across the sky. Note how much higher the Sun is in the sky in mid-summer! ... In addition, they are invariably tilted at an angle around 45 , to make sure that the arrival of the sun's rays is as close to perpendicular as possible. ... The rays of the summer sun, high in the sky, arrive at a steep angle and heat the land much more than those of the winter sun, which hit at a shallow angle. ...

Deriving the sine or cosine of an arbitrary angle takes a bit more math than is covered here. ... Note first of all that a right-angled triangle contains two angles. ... Because the side opposite to A is the one adjacent to (90њ- A), it follows that the sine of one angle is the cosine of the other, and vice versa: . ... Consider the triangle PQR (drawing) with all three angles equal to 60њ. ... If we want the angle A to grow in equal steps of 15 o , we still need the sine and cosine of 15њ and 75њ. ...

Next: Identification loop Up: Wavelength Calibration Previous: The Echelle Relation . As a consequence of the cross-disperser dispersion relation, a given line repeated in two overlapped regions of the spectrum must be found at the same y position if spectrum and detector are perfectly aligned. ... The above condition provides a geometrical way to estimate the angle, as: , with the difference in y position of the two occurences of the pairs and the difference of their x positions. ...

... Tools . ... begin{equation*} \frac{\vartheta}{\mathrm{rad}} = 2 \pi r = 2 \pi \end{equation*} . ... begin{equation} \frac{\Omega}{\mathrm{sr}} = 4 \pi r^{2} = 4 \pi \label{eqn_solidangle} \end{equation} . ... begin{equation*} \frac{\Omega}{\mathrm{sr}} = 2 \pi \, [1 - \cos(\vartheta)] \end{equation*} . ... end{equation*} . ... begin{equation*} \cos(\alpha) = \sin(\vartheta_{1}) \sin(\vartheta_{2}) + \cos(\vartheta_{1}) \cos(\vartheta_{2}) \cos(\varphi_{1} - \varphi_{2}) , \end{equation*} . ...

Общая Астрономическая Конференция > Товары для астрономов > Барахолка . продам широкоугольник minolta standard 10х50 wide angle BAK4 (Япония) . ... EQ-3 mount+EQDrive upgrade kit (motor)+ EQDrive Standard SL (GOTO) . монтировка для бинокля Parallelogram Standard 2 +orion 25x100 . ... Лунные феномены (редкие, необычные явления) Жизнь астрономов-любителей Анонсы астрономических мероприятий Астрономические клубы Наш "Старлаб" . ... Продано: Окуляр WO wide angle 20mm 66гр 1.25" . ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2010 April 21 . Wide Angle: The Cat's Paw Nebula . ... Still, no known cat could have created the vast Cat's Paw Nebula visible in Scorpius . ... Pictured above , a wide angle, deep field image of the Cat's Paw nebula was culled from the second Digitized Sky Survey . ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . ...

... Still, no known cat could have created the vast Cat's Paw Nebula visible in Scorpius . At 5,500 light years distant, Cat's Paw is an emission nebula with a red color that originates from an abundance of ionized hydrogen atoms. ... Pictured above , a wide angle, deep field image of the Cat's Paw nebula was culled from the second Digitized Sky Survey . ... Publications with keywords: emission nebula . Publications with words: emission nebula . ... IC 1396: Emission Nebula in Cepheus . ...

Chapter 11 (chapter 10 in the 2nd edition).

... Астрономический телескоп ETX-80AT-TC . ... Окуляр QX Wide Angle 30mm (2") . ... Поле зрения 70 градусов . ... Окуляр парфокален (то есть не требует перефокусировки при смене увеличения) не только с другими окулярами серии 4000QX, но и большинством других 2" окуляров от Meade и многих других производителей. ... Компактные цифровые фотоаппараты . Зеркальные цифровые фотоаппараты PENTAX . ... Окуляры PENTAX . ... Copyright PENTAR ї2004-2016. (бинокли, цифровые фотоаппараты, телескопы) . ...

... We can help students grasp the significance of Hubble's extremely keen eye, and learn a bit about angles and math in the process, with the following in-class activity. ... Looking through binoculars or telescopes allows us to magnify a small section of the sky. To measure sizes or distances in that small section, astronomers divide a degree into 60 smaller pieces called arcminutes, and further subdivide minutes into 60 smaller sections called arcseconds. ... 30 feet = . ... 36 seconds . ...

Eyepieces Forum Message . ... Eyepieces ћ Meade ћ Misc. ... Eyepieces | ... Need Super Wide Angle (SWA) Eyepiece ? ... H. 2inch/32mm/6-element/80Deg.A.F. SWA eyepiece US$115 . I. 1.25inch/14~25mm/6-element/75-80Deg.A.F. SWA eyepiece US$70-90 . J. 1.25inch/6.5~40mm/4-element Plossl Eyepiece US$25~30 . ... 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" . ...

Median Twilight Image . all frames normalized by their median before averaging and corrected for 4-port structure) . Median of Normalized Twilight Images at Rotator Angle 0 . Median of Normalized Twilight Images at Random Rotator Angle . Time Frame and Rotator Angle Distribution . B_UT2_2CCD: 134 frames . ... distribution of rotator angles) . U_UT2_2CCD: 106 frames . ... uncorrected median twilight image) . B_UT2: 298 frames . ... U_UT2: 246 frames . ... B_UT3: 266 frames . ...

... Class . ... FIELD | ... java.lang.Object ij.process.EllipseFitter . public class EllipseFitter . ... double . angle . ... Initialized by makeRoi() . ... drawEllipse ( ImageProcessor ip) . ... makeRoi ( ImageProcessor ip) . ... Field Detail public double xCenter . ... public double angle . ... The fit parameters are returned in public fields. public void drawEllipse ( ImageProcessor ip) . Draws the ellipse on the specified image. public void makeRoi ( ImageProcessor ip) . ...

STEP INTO THE BLUE - MEADE INSTRUMENTS PRODUCT GUIDE . ... Meade 4M Community . ... Meade Instruments . ... Telescopes . LX850 Series . ... Series 5000 Xtreme Wide Angle 14mm 100ТА Eyepiece (2") . ... Meade Series 5000 Xtreme Wide Angle 14mm Eyepiece (2") #07751. Featuring a staggering 100 degree apparent field of view Meade Series 5000 Xtreme Wide Angle Eyepieces use 9 optical elements to achieve a high contrast image with razor sharp correction all the way to the edge of the field. ...

... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Mars . ... Supernova showered Earth with radioactive debris . ... Early Mars bombardment likely enhanced life-supporting habitat . ... Get to Know the Night Sky . ... Asteroid DayУ?т??т??s Don Yeomans: Will asteroid 2013 TX68 strike Earth? ... How do mission designers know at what angle to land on an astronomical body such as the Moon, Mars, or Earth? ... Get instant access to subscriber content on Astronomy.com! ...

... Многогранники называются остроугольными, если все их двугранные углы являются острыми или прямыми. Одним из существенных стимулов для их изучения является то, что частным случаем остроугольных многогранников являются многогранники Кокстера, возникающие в теории групп отражений. Как описать все остроугольные многогранники? Если наложить на двугранные углы более сильное условие - быть острыми, то все такие многогранники (в трехмерном евклидовом пространстве) являются тетраэдрами. ...