... Carefully measure the diameter of the craters formed by the impact without disturbing the sand. ... Crater diameter increases with increasing mass. ... Without disturbing the sand, carefully measure the crater diameter. ... Did you measure any difference in the diameters of the craters? Yes, as velocity increases, so does crater diameter. ... Impact cratering. ... Impact craters can be demonstrated with younger or less advanced students using mud instead of sand and ball bearings. ...

Stellarium 0.12.3 . ... Classes . ... gSatTEME Class Reference . Sat position and velocity predictions over TEME reference system. ... Set compute epoch for prediction. ... gVector љ . ... Get the TEME satellite position Vector. ... Get the Geographic satellite subpoint Vector calculated by the method compute SubPoint. ... gVector Satellite position vector meassured in Km. x: position[0] y: position[1] z: position[2] . ... gVector Satellite Velocity Vector measured in Km/s x: Vel[0] . ...

... 2. ui , i- , : 5 ui = ( - sin cos i cosi - cos i sini T ), i (1) i ­ i- OYZ; i ­ i- OYZ, i = 225 - 90 i, i = 1,.. ... 6 max ( L1 , L2 ) nmax = min ( L1 , L2 ) ( nmax + 1) , nmax = min ( L1 , L2 ) max ( L1 , L2 ) - min ( L1 , L2 ) - . ... 3) D1min1 , D1min 2 7 mi n1min1 , n2 n1 , min 2 min 2 n1 , n2 , Dlast . ... 11) OX OXY : nxy = nijk - ( nijk , ez ) ez , (12) ex , ey , ez ­ . ... nxy , ex ) ( , ( nxy , ex ) < 0 -arccos nxy (13) OX OXZ : nxz = nijk - ( nijk , ey ) ey . ... 450 B2 (+225 ) B1 (-225 )...

Hydrocode Modeling of a High-velocity Impact of an Asteroid Particle on a Steel Surface . ... Present work deals with physical-mathematical modeling of hyper-velocity impacts up to 80 km/s. This problem is very important for asteroid protection systems and other critical nuclear and military objects. ... As a result of modeling, new models and criteria of extreme states of solids will be developed to describe hyper-velocity impacts. ... The LS-DYNA 3D hydrocode was used. ...

... Tonight's Sky . ... Astronomy for Kids . ... Sky Guide . ... Precisely measuring velocity of a supernova shock wave . A research team has succeeded in measuring the expansion velocity of a shock wave of the supernova remnant W44. ... Illustration of propagation W44 shock waves in the molecular cloud. ... A research team led by Tomoro Sashida and Tomoharu Oka of Keio University in Tokyo, Japan, has succeeded in precisely measuring the expansion velocity of a shock wave of the supernova remnant W44. ...

... The extinction in terrestrial atmosphere. ... A star was observed at different zenith distances during one night at the Engelgardt's Astronomical Observatory in the program of atmospheric extinction study at blue. ... Calculate the air mass for given zenith distances in 1st 54.9 11800 column, and write the result into the 2nd column. ... Spectral observations. ... Calculate the radial velocity Vr of the star on each date, the results of measurements and write calculations into the table. ...

. NASA TP # 3555, 1997. Jacques Lewalle, jlewalle@syr.edu

... File Summary: ------------------------------------------------------------------------------- File Name Lrec Records Explanations readme 80 24 This file cat_3.dat 21 2444 Cepheid radial velocities ------------------------------------------------------------------------------- File cat_3.dat : ------------------------------------------------------------------------------- Bytes Format Units Explanations 1-5 Star ...

... Space flight . ...

... Bad Astronomy . ... Bitesize Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... What better way than to use some simple equations to figure out the energy of an asteroid impact? When an asteroid or comet impacts the Earth, the size of the explosion depends on a lot of factors, but mostly on the mass of the impactor and the velocity of the impact. ... The energy released on impact will come up, in megatons. ... Mass and Impact energy: . ... 2008 Phil Plait. ...

LUNAR COMPLEX . The L3 system was designed of rocket stages G and D, its Lunar Orbiter (LOK) and rocket stage I, and its lunar vehicle (LK) and rocket stage E, a payload fairing protecting systems from aerodynamic and heat exposure in dense layers of atmosphere that was jettisoned when certain velocity heads have been achieved, as well as an emergency rescue system PU for the Lunar Orbiter descent module escape from the accidental LV. ... Official WEB-site of S.P.Korolev RSC Energia . ...

Blackholes2 Forum Message . Forums: . ... The River Model Of Black Holes . ... Some time ago on this forum I presented the opinion that space must be flowing into black holes at the speed of light at the event horizon for light to be trapped inside of the horizon. ... the river of space falls into the black hole at the Newtonian escape velocity, hitting the speed of light at the horizon." ... The river model of black holes . ... Inside charged black holes I. Baryons . ... www.astronomy.net . ...

... Program of the Course of Radio Astronomy . Moscow State University , Physics Department , Astronomy Division , 4 th year, 60 hours in total) . ... Molecular maser emission. ... The emission of the interstellar neutral hydrogen. ... Pacholczyk, A. G. Radio Astrophysics, W. H. Freeman & Co., ... Frontiers of Astrophysics, Avrett, E. H., ed., Harvard University Press, Cambridge, Mass., ... Kaplan, S. A., Pikelner, S. B. The Interstellar Medium, Harvard University Press, Cambridge, Mass., ...