Coordinate Systems used for spacecraft trajectory description: . ... The HGI coordinates are Sun centered and inertially fixed with respect to an X-axis directed along the intersection line of the ecliptic and solar equatorial planes. ... Cometocentric (solar) Ecliptic Coordinate System (CSE) . ... CSE coordinate system for the SC POSITION: axis origin at comet center, X-axis to the SUN, Z-axis to ecliptic north pole, (X,Y)-plane is parallel to the ecliptic plane. ...

... Bad Astronomy . ... Every few months, one of a series of questions comes up on the USENET group sci.astro involving tides, or the rotation of the Moon, or the recession of the Moon from the Earth. ... Why the Moon's rotation period is the same as the length of time it takes to orbit the Earth (same as number 1, but phrased differently). ... But when this happens, the time it takes for the Earth to rotate once will be slowed to exactly the same time it takes for the Moon to go around the Earth once! ...

THE 75th NAME-LIST OF VARIABLE STARS. ... The 75th Name-List consists of two tables. ... the literature, taken from positional catalogues, including USNO A1.0/A2.0 and GSC, or determined by the authors); the range of variability (sometimes the column Min gives, in parentheses, the amplitude of light variation; the symbol ( means that the star , in minimum light, becomes fainter, than the magnitude indicated); and the system of magnitudes used ( P are photographic ...

... Let Carol Vorderman help your child succeed in Science. Science Made Easy is one of Carol Vorderman's series of workbooks packed with notes and tips to make learning about Science easy and fun! ... Each title contains a progress chart so your child can keep track of all the exercises they have completed and parents' notes explain what children need to know at each stage and what's being covered in the curriculum so you can support your child. ... Age: over 3 years old . ...

... StarCalc Home Page - Downloads . ... File . StarCalc (English version) . ... With minimal configuration, version 5.72 of StarCalc includes the next interfaces: "Horizon", "Horizontal coordinategrid", "Equatorial coordinate grid", "Constellation boundaries", "Constellation lines", "Constellation names", "Star proper names", "Bright Star Catalog", "Deep-sky objects", "Sun", "Moon" and "Planets and satellites" . Plugins for StarCalc . ... Interface to NGC 2000 (plugin + catalog file) . ...

... RECORD FORMAT *** FROM TO SHORT DESCRIPTION 1 12 Filler (Identifier) value 'AEALAOAU ' 13 14 The last two digits of the YEAR 15 16 Month '01' to '12' 17 18 Day of the Month '01' to '31' 19 Component 'E' for AE /'L' for AL /'O' for AO/'U' for AU 20 21 Hour UT '00' to '23' 22 24 Name of the index 'AE'/'AL'/'AO'/'AU' 25 34 Filler (Edition number) value 'KYOTO/E02 ' 35 394 60 one minute values of the indices, 6 digit values 395 400 Hourly mean value of 60 one minute values ...

... Read MPEC 2008-W65 Read MPEC 2008-W67 M.P.E.C. 2008-W66 Issued 2008 Nov. ... 02138, U.S.A. Prepared using the Tamkin Foundation Computer Network MPC@CFA.HARVARD.EDU URL http://www.cfa.harvard.edu/iau/mpc.html 2008 WM61 Observations: K08W61M * K08W61M K08W61M K08W61M K08W61M K08W61M K08W61M K08W61M K08W61M K08W61M K08W61M K08W61M K08W61M C2008 C2008 C2008 C2008 C2008 C2008 C2008 C2008 C2008 C2008 ... Orbital elements: 2008 WM61 Epoch 2008 Nov. ...

... VaST is a software tool for finding variable objects on a series of astronomical images. ... VaST performs object detection and aperture photometry using SExtractor on each image, cross-matches lists of detected stars, performs magnitude calibration with respect to the first (reference) image and constructs a lightcurve for each object. ... VaST FITS image viewer ./pgfv . ... Part I" PZP, vol. ... K. V. Sokolovsky, S. A. Korotkiy; "New Variable Stars Discovered by the NMW Survey" PZP, vol. ...