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NEWSCIENCENEWSCIENCENEWSCIENCE when the universe was so young (100 reliability of his map-making method when, Volkas (Physical Review, June 2001). million years) that it was "smaller". The confronted with the problem, he mumbled: Their hobby-horse is a "mirror universe", distances between galaxies were 28 times "I don't believe in these dark clusters." but it contains positive mass. Thus, even shorter; they were nearly in contact. It was I returned very perplexed from the | supposing our universe should contain a collisional system, and frequent collisions | symposium. "mirror matter" equally as invisible as our produced whirling. Today there are still "twin matter", we would still sit with the "interacting galaxies", but it is a rarer Twin Matter or Photon Interactions? problem of compatibility with ephemeris phenomenon. The cosmos has expanded. But let us come back to the space probes. predictions. So Foot and Volkas evoke a But the American admitted she knew Consider the situation: for the first time, "photon—photon interaction" and describe a nothing about cosmology. She had no _ because of the "Swiss watch" mechanical __friction-like action, a sort of drag affecting original ideas; she relied on her computer. precision of the solar system, the deus ex the probes in this invisible environment. Dark matter is nowadays the accepted machina of contemporary astrophysics Why not? If ever the above-mentioned answer to all problems: the confinement of (dark matter) doesn't work. Another expla- mirrors are installed, we shall instantly galaxies and the governing factor in their nation must be found. know who is right. If they are, the drag formation. And even though it doesn't In my model, twin matter infiltrates will at all times be opposite to the satellite's seem to work very well, it is also supposed — everywhere where there is no ordinary mat- course, whether it be nearing the Sun or to explain the large-scale structure of the ter (and vice-versa, since they repel each drawing away from it. If such is not the universe. Dark matter is also presumed other), and it can be deduced that a quantity case, then only our model will remain in responsible for the strong gravitational lens of twin matter equal to 0.0000000001 contention. effects which have been observed. And grams per cubic centimetre should exist If any breakthrough is to be obtained in here we have a fact: multiple images of between the stars. The Sun (and neigh- the realm of cosmology, it could very galaxies which have been observed in the _ bouring stars) should repel this twin matter likely be thanks to local observations—as background, behind clusters of galaxies, _ to a certain distance. has been the case since 1917 with general could not have been formed by the latter, My calculations show that the Sun relativity—for example, the gain of whose mass is 10 to 100 times too small. should repel twin matter outside a "bubble" Mercury's perihelion and the diversion of So astrophysicists take it as unquestionable — whose radius is close to the distance from _ light rays near the Sun, observed during a evidence of the existence of dark matter. the Sun to Jupiter. Beyond this, the probes coronal eclipse. oo French journalist Augereau had an article would be struggling against the repulsion published in the March 17, 2000 issue of due to this environment. In their present , , . Le Monde, running with the headline: osition, this force should be as near as ‘ean-Pierte Petit was born in 1937. He graduated » Tunning with the a : P » this Tor ° from the Ecole Nationale Supérieure de "Dark matter exists, since it deviates light | constant, which is confirmed by observa- 'Aéronautique in Paris in 1961. He began his rays". With it was shown a colour picture, tion. career at the CNRS (Centre National de Recherche meant to be a scientific scoop, of a 3D My friend and colleague Norman _ Scientifique) in 1965. He presented a doctoral the- topography of this dark matter obtained by Molhant (a Canadian) and I are at present sis in 1972. Assigned to the Institute for Fluid decoding the "weak lensing" effects, which working on data referring to distances Mechanics in Marseille, he conducted theoretical produced deformed images of galaxies. between 5 and 30 AU beyond the orbit of an experimental research on MHD (magnetohy- Meillier and Fort, both of the Paris Jupiter. Nearer to this, data cannot be rodynamics). in 1967, a "bitemperature generator ’ pitel oe was successfully tested and plasma acceleration Astrophysics Institute, were the authors of exploited because radiation pressure was obtained in an MHD nozzle at exhaust speeds this map. But a year later, in an interview screens the signal (the probes, with their of up to 8 km/s, with annihilation of Velikhov's for the magazine Ciel et Espace, Fort con- huge dish-shaped antennas, are very sensi- __ instability (the key to present military MHD applica- ceded to some embarrassment. tive). By developing this data (which, _ tions). He is currently a Director of Research for the The map-making method had apparently notwithstanding the fact that the "dark mat- CNRS at ine “strophysics paboralory in marseille revealed the existence of two extremely _ ter" option leads nowhere, no one has done jy, r Petit has written 30 boo S, three 0 them relat- . . ~ g to the UFO problem (Investigation on UFOs, massive objects equivalent to several thou- up to now), we should be able to refine our — fryestigation on ETs who are Already Among Us, sands of galaxies (comparable to the largest model in order to be able to make predic- The Ummite Mystery, published by Albin Michel). known cluster of galaxies, the Coma clus- _ tions about this force for distances closer to Other titles include The Devil's Children, on the ter). Yet, from that region, nothing was _ the Sun (it takes two years to reach Mars __‘elationship between scientists and the military, and visible, absolutely nothing: not visible and five to reach Jupiter). We've Lost Half of the Universe, which has bearing on research in astrophysics and cosmology. He has About the Author: light, not infrared, not X-rays (clusters are In order to avoid radiation pressure due also written 19 science popularisation cartoons powerful X-ray sources). to the Sun's nearness from interfering with — which have been translated into eight languages. As a conclusion, Fort questioned: measurements, one could, for instance, Dr Petit can be contacted by post at Villa Jean- "...could it be 'dark clusters' exclusively position mirrors on massive objects, such Christophe, Chemin de la Montagnére, 84120 made up of ‘exotic matter'?". A magic mat- as one of the satellites of Mars, and make _ Pertuis, France. He can also be reached via his ter, producing a gravitational lens effect reflected laser beam measurements. Then, Website, http://www. jp-petit.com. that would therefore behave as positive when the orbiting satellite is on a course . : : : . About the Translator: mass, though without allowing ordinary away from the Sun, a slight deceleration Belgian-born André Dufour is a retired architect matter to exist therein. should be noted; and the opposite when on — whose hobbies include navigation and nautical In June [2001], Meillier admitted the acourse towards the Sun. astronomy. He translates for Editions MOAN, pub- discovery of a third such cluster. He had In this research, we have two _ lisher of the French edition of NEXUS. He can be only just asserted his confidence in the competitors: the Australians, Foot and — emailed at andre.Im.dufour@wanadoo.r. reliability of his map-making method when, confronted with the problem, he mumbled: "I don't believe in these dark clusters." I returned very perplexed from the symposium. About the Translator: Belgian-born André Dufour is a retired architect whose hobbies include navigation and nautical astronomy. He translates for Editions MOAN, pub- lisher of the French edition of NEXUS. He can be emailed at andre.Im.dufour@wanadoo. fr. 46 = NEXUS www.nexusmagazine.com AUGUST - SEPTEMBER 2002