Comunicados de Prensa

28 de Octubre de 1996: The construction of the largest optical telescope in the world, the ESO Very Large Telescope (VLT) , continues at full speed, aiming at first-light towards the end of 1997. There is hectic activity on all fronts, both at the Paranal Observatory in Chile and at the many involved industrial firms in Europe.

20 de Septiembre de 1996: This heavily processed image of C/1995 O1 (Hale-Bopp) is based on a CCD frame that was obtained on August 18, 1996, by Nick Thomas (Max-Planck-Institut fuer Aeronomie, Germany) and Heike Rauer (Observatoire de Paris, France), observing with the DFOSC multi-mode instrument on the Danish 1.54-m telescope at La Silla. The frame was taken at 04:20 UT through an R filter (to show the dust around the cometary nucleus) and the integration time was 20 s.

16 de Septiembre de 1996: On August 7, 1996, Eric W. Elst (Royal Observatory, Uccle, Belgium) reported his discovery of a cometary image on mid-July exposures by Guido Pizarro with the 1.0-m ESO Schmidt telescope at the La Silla Observatory. Further ESO Schmidt plates were then obtained, and on August 19, with the help of orbital computations by Brian Marsden (IAU Central Bureau for Astronomical Telegrams, Cambridge, Mass., USA), Elst was able to identify the object on them. Even though the orbit (Period = 5.6 years; inclination = 1.4 deg; eccentricity = 0.17) is entirely characteristic of that of a main-belt minor planet with the implied long-term orbital stability, the continued presence of a tail seemingly confirms the object as a 'comet'. The object now carries the designation 'Comet P/1996 N2 (Elst-Pizarro)'.

5 de Septiembre de 1996: On 5 September 1996, the Senate of the Republic of Chile (Second Chamber of the Parliament) has ratified the Interpretative, Supplementary and Modifying Agreement to the Convention of 1963, which regulates the relations between the European Southern Observatory and its host country, the Republic of Chile.

14 de Agosto de 1996: ISAAC (Infrared Spectrograph And Array Camera) will be the first major instrument to be installed at VLT Unit Telescope no. 1; according to the current planning, this will happen by mid-1998. ESO Press Photo eso9635a shows this complex instrument during the present, thorough technical tests in the Infrared Laboratory at the ESO Headquarters in Garching (Germany).

2 de Agosto de 1996: The past four centuries have seen dramatic improvements in astronomical equipment, in terms of better and larger telescopes, more accurate and sensitive detectors and, not the least, by advanced space instruments with access to new spectral regions. However, until recently there has been little progress on another equally important front, that of quantifying the unavoidable influence of this equipment on the astronomical data they produce. For a long time, astronomers have desired to remove efficiently these `instrumental effects' from their data, in order to give them a clearer understanding of the objects in the Universe and their properties. But it is only now that this fundamental problem can finally be tackled efficiently, with the advent of digital imaging techniques and powerful computers.

1 de Agosto de 1996: The Local Group of Galaxies consists of a few large spiral galaxies - for instance the Milky Way galaxy in which we live, and the Andromeda galaxy that is visible to the unaided eye in the northern constellation of the same name - as well as two dozen much smaller galaxies of mostly irregular shape. Whereas the larger galaxies have extended halos of very old stars, no such halos have ever been seen around the smaller ones. Now, however, Dante Minniti and Albert Zijlstra [1], working at the ESO 3.5-metre New Technology Telescope (NTT), have found a large halo of old and metal-poor stars around one of the dwarf galaxies in the Local Group. This finding is quite unexpected. It revises our understanding of star formation in these galaxies and provides important information about the past evolution of galaxies [2].

25 de Julio de 1996: Each of the giant Zerodur mirrors for the four unit telescopes of the ESO Very Large Telescope (VLT) , with a diameter of 8.2-metres and a total area of more than 50 square metres, will be supported by a complex steel structure, referred to as the M1 Cell . This structure will also support the M3 Tower that protrudes from the central hole of the mirror and carries a flat mirror (M3) that serves to reflect the light towards the Nasmyth platforms on either side of the telescope. On these platforms are placed the heavy instruments that will record the light from celestial objects collected by the telescope.

25 de Julio de 1996: Using telescopes in Chile, Europe, Australia and the USA, an international team of astronomers [1] has discovered large empty regions ('holes') in what they refer to as the 'local Universe'. These regions, as well as others with excess mass density are revealed by a study of the motions in space of more than 2000 galaxies. They are among the largest structures ever seen in the Universe and have diameters of up to 100 million light years.

18 de Junio de 1996: Astronomy On-Line is a major, all-European project that will take place in conjunction with the 4th European Week for Scientific and Technological Culture later this year. It is based on intensive use of the World-Wide-Web (WWW) and represents the first large-scale attempt in the world to bring together pupils and their teachers all over one continent to explore challenging scientific questions, using modern communication tools, both for obtaining and for communicating information.

30 de Mayo de 1996: The latest areal views showing the VLT building site at Cerro Paranal gives a good impression of the progress of the construction

24 de Mayo de 1996: The programme will be carried out in a collaboration between the European Association for Astronomy Education (EAAE) [1] and the European Southern Observatory, and together with the European Commission (EC).

20 de Mayo de 1996: Observations of Comet 1995 O1 (Hale-Bopp) continued at ESO during the period of May 10 - 14, 1996, with the MPI/ESO 2.2-m telescope and the multimode EFOSC II instrument. Both direct images and spectra were obtained.

20 de Mayo de 1996: The active phase of Astronomy On-Line will start on October 1 and reach a climax on November 18 - 22, 1996. A new and unknown comet was discovered by Robert Evans on a photographic plate, obtained by M. J. Drinkwater on May 10, 1996, with the UK Schmidt telescope at Siding Spring Australia. More observations were made within the next days and the comet was soon given the designation 'Comet 1996 J1' (i.e. the first comet to be found in the period May 1 - 15, 1996). Following astronomical tradition, it was also named after the discoverers.

18 de Abril de 1996: On April 12, two observers in Australia and Japan independently reported the sudden appearance of a supernova in the southern elliptical galaxy NGC 5061, a prominent object in the Centaurus constellation (IAUC 6380). The magnitude was about 13 (visual) and the exact position was measured as R.A. = 13h 18m 01.13s, Decl. = -26d 50m 45.3s (equinox 2000.0), or about 52 arcsec west and 31 arcsec south of the galaxy's center.

22 de Marzo de 1996: A series of CCD frames, showing the inner coma of Comet Hale-Bopp, was obtained with the SUSI high angular resolution camera at the ESO 3.5-metre New Technology Telescope (NTT) under very good seeing conditions in the morning of March 20, 1996.

19 de Marzo de 1996: The most recent ESO observations of bright Comet Hyakutake have shown rapid changes in the innermost coma, within a few hundred kilometres from the cometary nucleus. This result has only become possible because of the unusual combination of a bright comet being near the Earth, together with the excellent imaging quality of the ESO 3.5-metre New Technology Telescope (NTT).

17 de Marzo de 1996: This new image obtained with ESO's New Technology Telescope (NTT) shows the circumnuclear region of the comet Hyakutake, expected to pass close to Earth in the upcoming days.

15 de Marzo de 1996: Following recent observations at the ESO La Silla Observatory, there is now no doubt that Comet Hyakutake - as hoped - is developing into a major object! In any case, the observed, very complex structure as well as the extent of the tail system is typical of a bright and beautiful comet.

13 de Marzo de 1996: A complete, optical spectrum of Comet Hyakutake was obtained with the ESO 1.52-m telescope (La Silla Observatory) by Hilmar Duerbeck (ESO) on UT March 8.3, 1996. For this observation, the Boller & Chivens spectrograph with a new UV-sensitive CCD chip was used. The subsequent data reduction was performed by the observer and Stefano Benetti (ESO) at ESO's office in Santiago de Chile.