... 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. ...

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• Frames of Reference: The Basics
• Rotating Frames of Reference in Space and on Earth
• Frames of Reference: The Centrifugal force

An astronaut in low Earth orbit moves in (approximately) a big circle extending around the Earth. ... That can be interpreted as stating that in the astronaut's frame of reference, all bodies are subject to two forces, gravity and the centrifugal force, and the two are in perfect balance, adding up to zero. ... Wheel-shaped space . ... The science-fiction film "2001: A Space Odyssey" featured spinning space station, whose rotation provided the crew with "artificial gravity." ...

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• Newton's Second Law
• Frames of Reference: The Basics
• Newton and His Laws

... Bad Astronomy . ... Mad Science . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... City: Methuen State/Province: MA . ... Area of science: Earth Sciences . ... Does water swirl in limited gravity situations such as a space station? ... If you dropped a rock from the station axis (which would no doubt get you a free ticket back to Earth from an angry commander!) it would appear to arc strongly in the anti-spin direction as it fell, and the station rotated underneath it. ...

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• Phil Plait's Bad Astronomy: Misconceptions

... 8, ``Celestial Mechanics'', 2002 Generalized Nordtvedt effect and tests of equivalence principle for rotating bodies Yu. ... To study theoretical predictions for possible violation of EEP the Thirring­Feynman field gravity theory (FGT) is considered [3], [4]. ... Using Lagrangian formalism of the relativistic field theory the post­Newtonian equation of translational motion for rotating bodies is derived in the frame of FGT. ... Thirring W. Field--theoretical approach to gravitation. ...

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Instrument Science Report OSG-CAL-97-06 Velocity Aberration Correction for Parallel Observations Colin Cox October 22, 1997 ABSTRACT The velocity aberration correction performed by the HST pointing control software is valid for the target direction only. ... For directions within 500 arcsec of the target the variation of the correction difference does not exceed 24 milli-arcsec. ... As HST orbits about the earth, the barycentric velocity and hence the velocity aberration correction varies. ...

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• YAE | Maps Directions
• Directions to Space Telescope Science Institute
• HST FOS/COSTAR Small Aperture Spectroscopy of the Disk of Ionized Gas in M87

... When feed is rotated over the tertiary: . ... z is toward the tertiary from the focus position . ... angle : Center of rotation is about the optical axis. range 0 to 360 degrees (minus a few degrees for the limits) . ... CW when sitting on the tertiary looking up at the dipoles. radius : moves in the x,y plane along the direction that the angle currently points . ... Dipole positions : . ... D1 is at the center of the dipole array. processing: x101/projects/byuPhAr/idl/doplotoff.pro . ...

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• Slide 2
• dome_weight
• rotaPlatToSky

... Two Start of the data set. touch each other and cancellation big cluster of negative fragment at southwest also at the edge of at the northeast, and it The emerging positive negative fragments at its continues at the previous During the cancellation at the bipolar region, although there are short-living X-ray flashing sometimes, it is hardly to see any clear bright structure. ... 03:29 The negative fragments in the previous bipolar region become less, smaller and weaker. ... Cancellation continues. ...

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• Strong Gravity in the Vicinity of Supermassive Black Holes - by Eamon Scullion,
• PROBLEMS ?

... Centrifuge . ... Technical description centrifuge TSF-7 . ... If during rotation the operator feels badly, the hand will release, and the centrifuge will stop. ... Tests for cosmonauts: . ... Services / Centrifuge: General description Technical description Photo gallery Price . Info: Industry news On-line Data Company ATLAS news Events We in press Contact . Copyright 2000-2016 ATLAS Aerospace . ...

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grdfft - Perform mathematical operations on grdfiles in the frequency domain grdfft in _ grdfile -G out _ grdfile [ -A azimuth ] [ -C zlevel ] [ -D [ scale |g ] ] [ -E [ x|y ][ w ] ] [ -F [ x | ... The horizontal dimensions of the grdfiles are assumed to be in meters. ... Append a scale to multiply by (kr * scale ) instead. Alternatively, append g to indicate that your data are geoid heights in meters and output should be gravity anomalies in mGal. Default is no scale]. ...

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• http://xray.sai.msu.ru/~ivan/gmt/man/grdgradient.html
• rotating.sty

Stellarium 0.12.3 . ... TextParams Struct Reference . Parameters specifying how to draw text. ... TextParams (const float x, const float y, const QString &string) . Construct TextParams with default parameters. ... TextParams ( Vector3 < F > &position3D, StelProjectorP projector , const QString &string) . Construct TextParams to draw text at a 3D position, using specified projector. ... string љ . ... Text string to draw. ... The required string parameter is also set, as is the projector. ...

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... Table 1: Acceptable temperature difference Invar36 0 .0 5 C А (the CTE was selected as 0.7 for the FEA) Stainless Steel 304 0.002 CА(the CTE was selected as 17.2 for the FEA) Aluminium6061 0.0015 CА(the CTE was selected as 23 for the FEA) (2) Analysis of the temperature gradients of the mount generated by an ambient temperature difference of 0.5 CА on both sides of the mount Invar , S.S. or Al ... Stainless steel material is added to Table 4 and 5 for comparison with Invar. ...

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• Limits on Phase Correction Performance Due to Differences Between Astronomical
• FIRST postage-stamp and CUTOUT differences
• Corrections for NST IB Physics B `Classical Dynamics'

Astronotes Armagh Planetarium's Stellar Blog! ... Universe . ... About four centuries ago, a tiny white dwarf star about the same diameter as Earth, but with a mass equivalent to the Sun, swung in a tight orbit about some larger star. The white dwarfтАЩs intense gravity tore material from its more massive companion. ... The quantity of mass in the universe is constant since the universe started its last self-replication, since its last singularity, its last pre-big bang re-birth conception. ...

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... Masses are put in random positions within a sphere originally. ... RA (in radians) # Dec (in radians) ra = 2.0*math.pi* random () dec = math.acos(2.0* random ()- 1.0 )-0.5*math.pi return ra,dec def ranvec(): # Generates a randomly orientated unit vector. theta, phi = randomdirection() z = math.sin(phi) x = math.cos(phi)*math.sin(theta) y = math.cos(phi)*math.cos(theta) vec = numpy.array([x,y,z]) return vec # Stars interacting gravitationally # Program uses numpy arrays for high speed computations ...

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• http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/Orbits.doc
• Orbits
• The High-Z SN Search Description

Astronomy Discussion Forums . ... Teleportation . ... If the Sun lost half its mass; = includes basic concept apparently Sun losing "half its uncertainty", = Sun becoming more factorised (concentrated) .. ... If the sun lost half its mass, on this idea it would partially let go of gravity (well conventional physics says this too?) ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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• Gravity Always Attracts - an Astronomy Net Blackholes Forum Message
• Conceptualization On Gravity - an Astronomy Net Blackholes Forum Message
• I Read Somewhere - an Astronomy Net Blackholes2 Forum Message

... US state, Canadian province, or country . ... An artificial comet holds secrets to Earths life . ... space flight . ... space physics . ... Why doesn't the International Space Station rotate to create artificial gravity like stations in the movies? ... RELATED TOPICS: INTERNATIONAL SPACE STATION . The International Space Station is a one-of-a-kind lab-oratory for a specific reason: microgravity. ... Get instant access to subscriber content on Astronomy.com! ...

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• The first test of Einstein's gravity | Astronomy.com
• gravity | Astronomy.com
• Two probes, continuing science | Astronomy.com

Appendix A: Derivation of the Secondary Sag as a Function of Telescope Altitude . One-half of the secondary support structure consists of the two rods shown in Figure 9 plus the opposing rods on the other side of the secondary cage. The total tension force on a single rod can be decomposed into a thermal component and a base tension that is set at the time when the rods are originally tensioned with the turnbuckles. ... The axial force balance equation is then given by . ...

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• Instrument Orientations and Offset Directions
• TUI:Telescope:Offset Types
• Untitled Document

... The dependence of velocity ellipsoid parameters for various types stars upon theirage was investigated. ... For metal-rich stars ([Fe/H] -0.1) the shape of velocity ellipsoid becomes more spherical with increasing age of the stellar group and it approaches the equilibrium shape. ... По данным uvby -фотометрии, изохронным возрастам и собственным движениям ~3500 F -звезд диска в окрестности 80 пс от Солнца исследованы зависимости параметров эллипсоидов скоростей различных звезд от возраста. ...

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• Vladimir Marsakov Publication List
• Scientific Directions Achievements

scripts · Made a comparison with SCISIM ray trace that replicates each observation Main Analysis Steps · Select regions for each camera and run esas · Extract spectra and background · Made an . arf that is a guess for typical off axis angle ( fn(E) knowing only a single reflection occurs ) · Assume source spectrum of a LMXRB e.g. const*phabs*(diskbb+comptt) probably the detailed spectrum doesn't matter to 1st order · Also require an ...

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• satvelsrc: SATellite VELocity in SouRCe direction
• Astrometric correction
• Errors

... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

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• Historical Cosmologies
• Evidence for Dark Matter
• Fred, Sam and Ralph - continued

... Fit the ring around the equator and then change its inclination from 0 degrees (equatorial orbit used by geosynchronous satellites) to 28.5 degrees (space shuttle orbit) to 51.6 degrees (space station orbit) to 90 degrees (polar orbit used by spy satellites). by Rob Landis, Space Telescope Science Institute . ... With so many satellites now in orbit, it is likely that you have seen an artificial satellite zipping across the night sky. ... http://www.amsat.org/amsat/ftpsoft.html . ...

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• ASP: Black Holes
• ASP: Exploring Venus
• ASP: To Every Season There is a Reason