... Electric Forces . 19.Motion in a Circle . ... In the absence of forces, motion in a straight line and constant velocity continues indefinitely. ... Each rotation the stone covers a distance . ... Since its velocity v equals the distance it moves in one second, one finds . ... while the actual motion brings it to some point D on the circle, whose center will be denoted by O. In the absence of forces, motion in a straight line and constant velocity continues indefinitely. ...

In the absence of forces, motion in a straight line and constant velocity continues indefinitely. Motion in a circle, however, requires forces to act. ... Since its velocity v equals the distance it moves in one second, one finds . ... The above result suggests that steady motion around a circle, at least for a short time span, can be viewed as the sum of a straight-line motion with fixed velocity v , plus an accelerated motion towards the center of attraction, with the above acceleration, a . ...

Next: Dark current and cooling Up: CCD Scientific Performance Previous: Particle Background Rejection . ... A standard TV format CCD is only 15mm across its diagonal, and hence substantial effort has had to be expended to increase the size of individual chips, and to develop techniques for mosaicking many chips, efficiently to cover the focal plane areas. ... This aspect alone hints at the complex trade-offs involved in the design of a CCD focal plane. ...

... You can work in group sizes as large as 5. Each individual in that group could be assigned a particular question which would allow the group to complete the assignment in a more efficient manner. ... Off in the corner of the store was a small black box with a big sign that read . ... As the century turned, Africa began to emerge from a Dark Age stretching as far back as life on earth, into all the years that lay ahead - years of Renaissance, Enlightenment, Industry, and, if you will, Anxiety. ...

... SPICE User's Guides . brief - User's Guide for BRIEF, a utility program that allows you to summarize the ephemeris contents and coverage for one or more SPK files. ? ... commnt - User's Guide for COMMNT, a utility program that is used to add comments, extract comments, read comments, or delete comments in SPICE SPK, CK and EK files. ? ... tobin - User's Guide for TOBIN, a command line utility program that converts transfer format SPK, CK and EK files to binary format. ? ...

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Astrophysics graduate student programs . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

... ,E_=v_B_z,B_z0 Light cylinder at RL U = electric voltage created by rotating BH I = large scale current I U LK Centrifugal acceleration in BH magnetosphere Assume `reasonable' B and E fields, from current I : Bz = 0 = v/v 1 Motion of a test particle P ( ) Light cylinder Pz() P() z() Here = 0.01 and = rc,i/RL = 0.01 Growth of particle Lorentz factor ( ) log k At light cylinder : = Here with initial value is the absolute maximal reachable by this process (ie no ...

Supernova cosmology : legacy and future Bruno Leibundgut ESO Congratulations! for the discovery of the accelerating expansion of the Universe through observations of distant supernovae Supernova Cosmology · Required observations ­ light curve ­ spectroscopic classification ­ redshift · Required theory ­ cosmological model ­ ( supernova explosions and light emission) · ... 2009 Union2 data set (557 SNe Ia) Goobar & Leibundgut 2011 Supernova Cosmology ­ do we need more? ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

... Proposal Type: General Category: Observation Category: Time Requested this semester: Hours Next Semester: Hours already used for this pro ject: Additional Hours required to complete pro ject: Minimum Useful Time: Expected Data Storage: Prop osal Title: ABSTRACT: Regular Pulsars Galactic 13 2 18 1 less than 100 GB PSR J1946+3417: the most massive pulsar ever? We propose to continue pro ject P2817 that is targeting a new millisecond binary pulsar with an unusual eccentric orbit, PSR J1946+3417. ...

ION AND ELECTRON ENERGY DETECTOR PAN-2 . ... The energy and angular distributions of charged particles can bring further information on the nature and spatial scales of magnetospheres processes. ... It permits the fast measurements of energy and angular parameters of charged particles in the range 40eV-40keV. ... The sensor unit is an electron electrostatic, axially symmetrical, toroidal analyzer. ... The energy range for both types of charged particles must stepped according to the logarithmic scale. ...

Azimuth Drive Box Replacement . ... A. Start with drive box with soft spring preload Drive #2 . ... Loosen horizontal foot . ... Loosen horizontal foot the remaining amount , push preload foot in to ring and work drive box away from disc. Once clear of disc raise hoist and remove drive box . ... Lift new box in place - do not contact drive disc with box . ... Connect tangential link and set alignment using drive box to disc clearance and foot centering as metrics . ... Repeat for each box. ...

A joule expended continuously for one second is a watt, which means a liter of water, converted to energy could power a 1 watt light bulb for 9 • 1016 seconds, or 2.5 • 1013 hours. ... What would happen if you turned all those light bulbs on for two and a half hours? ... One joule is equal to about four food calories. ... Minding Your Joules . ... Energy is given in joules and not many kids know what a joule is. ... one estimate gives the energy yield of the Big Bang as 10 68 joules . ...

... Currently, there is very little information on comets which are active beyond the orbit of Jupiter. ... Previous observations conducted by our team with the SAO RAS 6-m telescope showed that some of these comets have extended tails dissimilar to the tails of comets forming at close heliocentric distances. ... We for the first time measured the linear polarization of scattered emission for the two distant comets C/2010 S1 (LINEAR) and C/2010 R1 (LINEAR) at heliocentric distances of 5.9-7.0 au. ...

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... Solar System . ... Pioneering Solar Sail: Artist?s impression of Nanosail-D after deployment above Earth?s atmosphere (image credit: NASA) . ... This is the basic idea behind solar sails, however the practical application of this theory hasnтАЩt always run a smooth course. ... Cosmos 1 was to be the first solar sail spacecraft, which would rely exclusively on solar pressure to control the crafts orbit. ... The solar sail had confirmed acceleration due to solar radiation by 9 July 2010. ...

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... ASRAS Board Members . ... Site . ... ASRAS Board Positions . ... President - . ... The president has many responsibilities like running monthly meetings, running the monthly board meeting, representing ASRAS at local events like star parties, planetarium events, RMSC events, the monthly newsletter presidents message, etc .. ... The Vice Presidents position is mainly to assist the president and back them up if they cant make a major function like a general meeting or write the newsletter pres message...

Hide Zen home . ... Collecting more catalogues x2013; right now I would like to have catalogues like 2DF, RC3 . Allow the storage of SQL views in CAS. Arbitrary SQL queries from the user. My opinion is that's in the very future, since it requires the system to queue the queries, it requires the user quota system (of the user's data in the DB), and I guess it requires an additional (or more powerful) server. And right now we don't have any of these things x2026; . ... Zen, 2003-2007 ...

... Extreme sensitivity photon counting systems . ... Resolution to 3080 x 2304 pixels x 16 on photon counting systems . ... These can be coupled to a suitable scintillator to match customers' requirements, and to provide imaging covering the electromagnetic spectrum from UV to high energy gamma rays and particles. ... Photek image intensifiers and photon counting tubes are used in CERN and are chosen for the ACE explorer satellite system for reading out arrays of scintillating plastic fibre. ...