... Tonight's Sky . ... Observing . ... Observing springtime deep-sky objects with a large telescope . ... Astronomy 101 . ... When you re finished reading this article, refer back to recent issues of Astronomy and carefully read telescope reviews (subscribers can read them online in the Astronomy.com Equipment Review Archive ). ... By doing this, you ll learn what s important to observers when they use a telescope. ... The three main types of telescopes use lenses, mirrors, or a combination of both. ...

For all keywords that contain a red and a blue value, the blue value comes first. ... The full pathname, but without the trailing "b.fit" and "r.fit", that would be given to the next exposure if the basename argument is not given to the expose command. ccdHeaters=float,float . ... bluelambda2=float [M] . The center wavelength for the given grating: the 1 or 2 indicates the grating bay. The bluelambda and redlambda keywords match one set of these, depending on the position of the turret. ...

Next: Results & Discussion Up: Coronal Hole Diagnostics out Previous: Introduction . ... The dates of the observations discussed here, their locations, pointing, slit sizes and exposure times are given in BTDW. ... Line fits are given by the dotted line. ... An estimation of the errors in the derived parameters was obtained using the GA-derived parameters as an input for a ``classical'' IDL-CURVEFIT procedure (Peter, 1999; Peter & Judge, 1999). ...

Download Izmccd (~2.7 MB). ... If you want to calculate equatorial coordinates of object: . Click the " File " menu, and then click " Open " ; or press ?on toolbar. Choose a file with image. ... Also see section " Viewing of image ". ... Before, if it is necessary, you must make an account dark current and flat field (See section " Preliminary processing of images ".) ... Measure the marked stars. ... Click the " Calculations " menu, and then click " Coordinates " or . ...

MULTISCOPES . MULTISCOPE-EF . ... ACCESSORIES . ... HOME . ... ABOUT LOMO . PRODUCTS . MICROSCOPES . ... Home Products Microscopes Multiscopes EDUPOINTER . ... Teaching Pointer Eyepiece . LOMO?s unique and easy-to-use EDUPOINTER? is simply a 10X (F.N. 18) eyepiece with a built-in pointer that is focusable, movable and fully retractable for unobstructed observation ?an unsurpassed advantage over conventional eyepieces with pointers that always remain in the middle of the field of view. ...

... Meade Instruments Corporation . ... Section 3: File Menu . ... Displays the dialog to open an existing image: . ... Saves the current image as a new file name or new file type, or both. ... This can be useful to prevent having 20 or more images open at once, and saves having to close them manually. ... This is done by creating a text file with the same name as the image file. ... Note that Image Information is saved within the FITS file, so there will not be a text file to accompany these files. ...

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... les plus belles images de l'Univers d?йcrypt?йes pour vous . ... des pages consacr?йes ?а la publication de vos photos Mais c'est aussi une vraie communaut?й avec laquelle partager votre passion et nourrir votre curiosit?й. Accueil ?А la une Photographier le ciel . ... En quelques points cl?йs, nous vous invitons ?а vous familiariser avec ses fonctions essentielles pour pouvoir aborder sereinement la photographie du ciel. ...