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3361. http://www.mso.anu.edu.au/annualReport/1999/annualrep1999.pdf
RSAA Annual Report 1999 RESEARCH SCHOOL OF ASTRONOMY & ASTROPHYSICS ANNUAL REPORT 1999 The Institute of Advanced Studies The Australian National University 1 RSAA Annual Report 1999 Research School of Astronomy & Astrophysics Institute of Advanced Studies The Australian National University Mount Stromlo Observatory Private Bag Weston Creek Post Office Canberra ACT 2611 Australia Mount Stromlo Observatory Ph: (02) 6249 0230 Fax: (02) 6249 0233 Siding Spring Observatory Ph: (02) 6842 6262 Fax: (02) 6842 6240
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Ссылки http://www.mso.anu.edu.au/annualReport/1999/annualrep1999.pdf -- 1204.9 Кб -- 15.10.2004
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3362. Stromlo - Guide to the Game
... You are presented with a series of places, people and situations, and by typing commands on the computer can influence what happens. ... Time only passes in response to your commands п you can spend as much time as you like thinking about things. ... In this game, you type commands in plain English every time you see the prompt >. ... Type Drop to get rid of stuff. ... Unless specifically prompted by the game, donуt tell anyone too much п just type something like рtell Fred about my new carс. ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/Stromlogame/Stromlo.htm -- 14.5 Кб -- 07.10.2004
[ Сохраненная копия ] Ссылки http://www.mso.anu.edu.au/~pfrancis/Stromlogame/Stromlo.htm -- 14.5 Кб -- 07.10.2004
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[ Сохраненная копия ] Ссылки http://www.mso.anu.edu.au/~pfrancis/Stromlogame/Stromlo.htm -- 14.5 Кб -- 07.10.2004
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3363. http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/doppler.pdf
... The general term for these waves is "Electromagnetic Waves". ... ASTR1001 Wavelengths Ї Electromagnetic waves, while all travelling at the same speed, can have different wavelengths (the distance between the crest of one wave and the next). ... Red Light: Wavelength 700nm Green Light: Wavelength 550nm Blue Light: Wavelength 400nm Ultra-Violet Light: Wavelength 300nm ASTR1001 The Electromagnetic Spectrum Ї Electromagnetic waves can have any wavelengths at all: anywhere from picometres to light-years....
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Ссылки http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/doppler.pdf -- 841.5 Кб -- 09.08.2004
[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/MysteryPlanet/doppler.pdf -- 841.5 Кб -- 09.08.2004
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[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/MysteryPlanet/doppler.pdf -- 841.5 Кб -- 09.08.2004
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3364. Key formulae
If an object emits a total power (energy per unit time) L (L for luminosity), this radiation will spread outward into space, becoming more spread-out and diffuse as it goes. ... If an object receives more heat than it dissipates, then its temperature will rise. ... Any object at a temperature above absolute zero will radiate energy. ... A is the surface area of the black body, T is its temperature, and s = 5.67 ? 10 -8 Wm -2 K -4 (the Stefan-Boltzmann constant). ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/thermodynamics.htm -- 15.5 Кб -- 09.08.2004
[ Сохраненная копия ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/MysteryPlanet/thermodynamics.htm -- 15.5 Кб -- 09.08.2004
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[ Сохраненная копия ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/MysteryPlanet/thermodynamics.htm -- 15.5 Кб -- 09.08.2004
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3365. http://www.mso.anu.edu.au/pfrancis/roleplay/galaxy_roleplay.pdf
... 1 Star Mapp ers You are a group of amateur astronomers, and you've spent the last ten years mapping the sky, drawing beautiful charts of everything you can see with the naked eye. ... Rather different is the famous, and unexplained "Milky Braid", a band of diffuse white light that crosses the sky. ... At any given time, from and particular point on Klovia, you can only see half of it, but the full braid goes all the way, 360 degrees, around the sky. ... Let's say you see a dot of light. ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/roleplay/galaxy_roleplay.pdf -- 50.4 Кб -- 15.04.2004
[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/galaxy_roleplay.pdf -- 50.4 Кб -- 15.04.2004
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[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/galaxy_roleplay.pdf -- 50.4 Кб -- 15.04.2004
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3366. http://www.mso.anu.edu.au/pfrancis/roleplay/newstarform.pdf
Star and Planet Formation Role-Playing Exercise Paul Francis Original Version April 1997. This version March 10th 1998 1 The Puzzle Many giant gas clouds exist in space: they are about 1016 m in size, and have masses of around 3 в 1030 kg. ... Perhaps you were fascinated by meteorites during your childhood, and decided to figure out how they formed, or maybe pictures of swirls of dust in space (tiny grains of solid material floating amidst the interstellar gas) got you into this field. ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/roleplay/newstarform.pdf -- 58.2 Кб -- 15.04.2004
[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/newstarform.pdf -- 58.2 Кб -- 15.04.2004
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[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/newstarform.pdf -- 58.2 Кб -- 15.04.2004
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3367. http://www.mso.anu.edu.au/pfrancis/roleplay/zog_answer.doc
... The Distance Scale. Zog's star lies in the outskirts of the GMS, which is a fuzzball just like any other (only nearer). ... Distances along the short axis (Dec (90) are denoted x, those along another direction y. The two jets with positions are at x=20, y=1.75, and x=12.5, y=0.705 The "jet" extending from the northern blue spot is a galaxy at x=15, y=0.25. ... Assume that the GMS has a luminosity L. We will see an image of the GMS at distance 50 Mpc, 100 Mpc, 150 Mpc etc in both directions. ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/roleplay/zog_answer.doc -- 147.5 Кб -- 05.04.2004
[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/zog_answer.doc -- 147.5 Кб -- 05.04.2004
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[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/zog_answer.doc -- 147.5 Кб -- 05.04.2004
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3368. http://www.mso.anu.edu.au/pfrancis/roleplay/Space_Law.doc
... What is someone's legal position in space? ... The police force of the country over which they were passing at the time? ... If not, any orbiting spacecraft would need permission from practically every country on Earth: almost impossible and probably very expensive. ... The treaty also set up the Committee on the Peaceful Uses of Outer Space (COPUOS). ... Even after all our effort in moving an asteroid into Earth Orbit, we would not currently have any legal control over it. ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/roleplay/Space_Law.doc -- 39.0 Кб -- 17.03.2004
[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/Space_Law.doc -- 39.0 Кб -- 17.03.2004
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[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/Space_Law.doc -- 39.0 Кб -- 17.03.2004
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3369. http://www.mso.anu.edu.au/pfrancis/roleplay/fake_cosmology_roleplay.pdf
... In this universe, redshift depends on galaxy temperature, as can be seen from the spectra of bright galaxies. ... Here are those spectra. Galaxy W21 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 300 400 500 Flux Galaxy W43 Wavelength (nm) 600 700 2.5 Wavelength (nm) 2 1.5 1 0.5 0 300 400 500 Flux 600 700 Galaxy W77 25 Wavelength (nm) 20 15 10 5 0 300 400 500 Flux Galaxy W101 600 700 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 300 400 500 Flux 600 700 Wavelength (nm) Weminimi Telescope National Facility. ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/roleplay/fake_cosmology_roleplay.pdf -- 712.2 Кб -- 17.03.2004
[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/fake_cosmology_roleplay.pdf -- 712.2 Кб -- 17.03.2004
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[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/fake_cosmology_roleplay.pdf -- 712.2 Кб -- 17.03.2004
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3370. Wavelength Data
... 1419.977 . ... 1419.978 . ... NaN . 0.00E+00 . ... 1420.021 . ... 1420.023 . ... 1420.024 . ... 1419.976 . ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/datatable.htm -- 117.6 Кб -- 17.03.2004
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[ Сохраненная копия ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/MysteryPlanet/datatable.htm -- 117.6 Кб -- 17.03.2004
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3371. http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/ass3.doc
ASTR1001 "Astrophysics" Assignment 3. The Story So Far Due to persistent nagging from the science team, Captain Chubb eventually relented and sent a stealthy robot probe in close to take pictures. The probe got to 500 AU out, and took one close up picture of the dot. ... No further data were taken. ... HD666123 was to the left of the field imaged. [pic] The dot actually consists of two objects, a large one (component A) and a small one (component B). ... The Assignment. ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/ass3.doc -- 85.5 Кб -- 17.03.2004
[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/MysteryPlanet/ass3.doc -- 85.5 Кб -- 17.03.2004
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[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/MysteryPlanet/ass3.doc -- 85.5 Кб -- 17.03.2004
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3372. ASTR1001 ?Astrophysics? Assignment 1
ASTR1001 "Astrophysics" Assignment 3. ... Due to persistent nagging from the science team, Captain Chubb eventually relented and sent a stealthy robot probe in close to take pictures. The probe got to 500 AU out, and took one close up picture of the dot. ... No further data were taken. ... The dot actually consists of two objects, a large one (component A) and a small one (component B). ... The luminosity of the two components could be measured from the image at three wavelengths. ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/ass3.htm -- 5.2 Кб -- 17.03.2004
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3373. http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/ass2.doc
ASTR1001 "Astrophysics" Assignment 2. ... The new data comes from the telemetry division, who have now been monitoring the radio signals from the "dot" since you arrived. ... The radio signal is entirely emitted in a narrow frequency range, near 1420 MHz. ... The captain has passed these data on to you, the science team, for your analysis. ... For this assignment, you should deduce as much as possible, using the data that I've provided here, plus the data from the first assignment.. ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/ass2.doc -- 265.0 Кб -- 17.03.2004
[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/MysteryPlanet/ass2.doc -- 265.0 Кб -- 17.03.2004
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[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/MysteryPlanet/ass2.doc -- 265.0 Кб -- 17.03.2004
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3374. ASTR1001 ?Astrophysics? Assignment 1
ASTR1001 "Astrophysics" Assignment 2. ... The new data comes from the telemetry division, who have now been monitoring the radio signals from the "dot" since you arrived. ... The radio signal is entirely emitted in a narrow frequency range, near 1420 MHz. ... The captain has passed these data on to you, the science team, for your analysis. ... For this assignment, you should deduce as much as possible, using the data that I?ve provided here, plus the data from the first assignment.. ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/ass2.htm -- 4.1 Кб -- 17.03.2004
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3375. http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/Answer_1.doc
Answer 1: The dot's speed (5.4 km/s) is too slow to keep it in a circular orbit (the centrifugal force is not as great as the gravity). ... If it is D metres from Twinky, r metres in diameter, and absorbs 80% of the light that falls on it, it will receive power given by P = (80% x (r2 Lsun)/(4(D2) It will radiate a power (from the Stefan Boltzman equation) of P = 80% x 4(r2 (T4 Equating the two, and solving for T, we find that the temperature at present is around 220K (-53o Celsius). ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/Answer_1.doc -- 23.0 Кб -- 17.03.2004
[ Текст ] Ссылки http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/answer1.pdf -- 23.0 Кб -- 17.03.2004
[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/MysteryPlanet/answer1.pdf -- 23.0 Кб -- 17.03.2004
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[ Текст ] Ссылки http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/answer1.pdf -- 23.0 Кб -- 17.03.2004
[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/MysteryPlanet/answer1.pdf -- 23.0 Кб -- 17.03.2004
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3376. Answer 1:
Answer 1: . The dot?s speed (5.4 km/s) is too slow to keep it in a circular orbit (the centrifugal force is not as great as the gravity). ... What is the equilibrium temperature of the dot at the moment? ... Equating the two, and solving for T, we find that the temperature at present is around 220K (-53 o Celsius). ... So at present, it is bitter winter on the Dot, but at peri-astron it could be quite pleasant and Earth-like. ... So: the dot is in orbit around Twinky. ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/Answer_1.htm -- 3.9 Кб -- 17.03.2004
[ Сохраненная копия ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/MysteryPlanet/Answer_1.htm -- 3.9 Кб -- 17.03.2004
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[ Сохраненная копия ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/MysteryPlanet/Answer_1.htm -- 3.9 Кб -- 17.03.2004
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3377. http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/Answers_23.doc
... What do we know? ... The peak radio emission is around 7(10-16Wm-2, and we are viewing it from a distance of half a light year. ... Radio Power. ... So the total power striking both is around 1017W. So the radio power coming out at 1420 MHz is comparable to all the Twinky light falling on both objects combined! ... If both planets had the same mass, they would orbit around a point mid-way between them, so the radius of motion of the radio source would be around 14,000 km. ... Reflected Twinky light...
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Ссылки http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/Answers_23.doc -- 51.5 Кб -- 17.03.2004
[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/MysteryPlanet/Answers_23.doc -- 51.5 Кб -- 17.03.2004
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[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/MysteryPlanet/Answers_23.doc -- 51.5 Кб -- 17.03.2004
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3378. Answers: Assignment 3
Answers: Assignments 2/3. ... We know that the radio source changes in frequency between 1419.976 and 1420.024 MHz. The peak radio emission is around 7 ? ... Radio Power. ... If both planets had the same mass, they would orbit around a point mid-way between them, so the radius of motion of the radio source would be around 14,000 km. ... We know that the radio source is 20,576 km from the centre of mass, and is moving at 5.07 km/s. Planet A is 1101/20576 = 5.35% as far, and so is moving at 5.35% ? ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/Answers_23.htm -- 12.9 Кб -- 17.03.2004
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[ Сохраненная копия ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/MysteryPlanet/Answers_23.htm -- 12.9 Кб -- 17.03.2004
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3379. http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/answer23.pdf
... The peak radio emission is around 7в10-16Wm-2, and we are viewing it from a distance of half a light year. ... If both planets had the same mass, they would orbit around a point mid-way between them, so the radius of motion of the radio source would be around 14,000 km. ... We know that the radio source is 20,576 km from the centre of mass, and is moving at 5.07 km/s. Planet A is 1101/20576 = 5.35% as far, and so is moving at 5.35%в5.07 = 0.271 km/s. Similarly, Planet B is (20576+5413)/20576 = . ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/answer23.pdf -- 106.0 Кб -- 17.03.2004
[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/MysteryPlanet/answer23.pdf -- 106.0 Кб -- 17.03.2004
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[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/MysteryPlanet/answer23.pdf -- 106.0 Кб -- 17.03.2004
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3380. http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/Orbits.PDF
Orbits Why don't satellites just fall down? ... The force F of gravity between two objects of mass m and M, whose centres are a distance r apart, is given by Newton's famous equation: F= where G = 6.67в10-11 N m2 kg-2, and F is measured in Newtons. ... When an object of mass m moves in a circular path of radius r at a velocity v, it will experience an outward centrifugal force given by the equation: mv F= r 2 For a satellite to stay in orbit, this centrifugal force must balance gravity. ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/Orbits.PDF -- 24.2 Кб -- 17.03.2004
[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/MysteryPlanet/Orbits.PDF -- 24.2 Кб -- 17.03.2004
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[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/roleplay/MysteryPlanet/Orbits.PDF -- 24.2 Кб -- 17.03.2004
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