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Vision E L B B ESA BR-157 HUBBLE SPACE TELESCOPE April 2000 10 YEARS THAT CHANGED OUR VISION E L B B European Space Agency U Agence spatiale européenne Contact: ESA Publications Division c/o ESTEC, PO Box 299, 2200 AG Noordwijk, The Netherlands H Tel. (31) 71 565 3400 - Fax (31) 71 565 5433 Webpages for Hubble European Space Agency Information Centre http://hubble.esa.int HUBBLE Webpages for ESA Science European Space Agency Information Centre http://sci.esa.int The Hubble Project The Hubble Space Telescope is a project of international co-operation between the National Aeronautics and Space Administration (NASA) and the European Space Agency (ESA). The partnership agreement bet- ween ESA and NASA was signed on 7 October, 1977. ESA has provided two pairs of solar panels and one of Hubble's scientific instruments (the Faint Object Camera), as well as a number of other com- ponents. In addition, 15 European scientists are working at the Space Telescope Science Institute in Baltimore (STScI), which is responsible for the scientific operation of the Hubble Observatory and is managed by the Association of Universities for Research in Astronomy (AURA) for NASA. In return, European astronomers have guaranteed access to 15% of Hubble's observing time. The Space Telescope European Coordinating Facility (ST-ECF) hosted at the European Southern Observatory (ESO) in Garching bei München, Germany, supports European Hubble users. ESA and ESO jointly ope- rate the ST-ECF. Text and Compilation: Picture Credits Lars Lindberg Christensen Images taken with Hubble: Published by: NASA, ESA, and the individual scientists ESA Publications Division ESTEC, PO Box 299, Servicing Mission images: 2200 AG Noordwijk, NASA The Netherlands Solar Panels on p. 15: Editor: Russ Underwood, Bruce Battrick Lockheed Martin Missiles & Space Design and layout: VLT image on p. 16 and ESO HQ image on p. 10: Martin Kornmesser and European Southern Observatory (ESO) Lars Lindberg Christensen NGST image on p. 16/17: Copyright: NASA © 2000 European Space Agency ISBN No.: 92-9092-611-2 More information on the ESA Science Programme: http://sci.esa.int 10 Years that Changed our Vision - Europe & Hubble Claude Nicollier ESA astronaut and astronomer A large ground based telescope is always surrounded by a massive mount... Hubble is free floating in space, light, slim, apparently fragile, but incredibly capable! Table of Contents Background Changing our Vision 4 About Hubble 6 Initial Problems 8 Europe & Hubble – Science and Operations 10 Europe & Hubble – Technology 12 The Launch and the Servicing Missions 14 The Future 16 Science The Deep Fields 18 The Size and Age of the Universe 20 Stellar Evolution 22 Our Solar System 24 Black Holes, Quasars and Active Galaxies 26 Formation of Stars 28 The Composition of the Universe 30 Gravitational Lensing 32 The Keyhole Nebula. 2 3 Table of Contents Background Changing our Vision 4 About Hubble 6 Initial Problems 8 Europe & Hubble – Science and Operations 10 Europe & Hubble – Technology 12 The Launch and the Servicing Missions 14 The Future 16 Science The Deep Fields 18 The Size and Age of the Universe 20 Stellar Evolution 22 Our Solar System 24 Black Holes, Quasars and Active Galaxies 26 Formation of Stars 28 The Composition of the Universe 30 Gravitational Lensing 32 The Keyhole Nebula. 2 3 ChangingChanging ourour VisionVision "Hubble is a European success story...” he involvement of the European Space Agency in these areas we have shown ourselves to be reliable partners. the Hubble Project dates back to 1977 and initially Tthere may have been doubts about its effective The next decade of Hubble will see an even more effective return. First, the long delay due to the Challenger disaster, scientific return for Europe as European astronomers followed by the unexpected discovery of the spherical aber- benefit from the synergy of Hubble with large ground-based ration of the telescope mirror soon after launch, made any telescopes that are now becoming available to them. prospects for a scientific return seem distant. Furthermore, ESA is now in a position to negotiate an important future contribution to the Next Generation Today, after 10 years of operation, we can confidently say Space Telescope with NASA and the Canadian Space that European investment in the Hubble Project has been, Agency. and remains a great ESA success! With such exciting prospects, it is important that the Euro- The impressive impact that the Hubble observations have pean community, particularly its younger generation, is had on astrophysics and cosmology is, to a not inconside- regularly and effectively informed about the progress and rable degree, due to the intellectual contribution of Euro- the successes that Europe is achieving in this field. For this pean scientists, who, thanks to the ESA participation, have reason we have established the Hubble ESA Information had access to this unique facility. The large fraction of Centre to maintain effective communication channels Hubble observing programmes and scientific papers which between the Hubble and NGST projects and the European include European astronomers has confirmed that ESA’s media. decision to participate in Hubble was a wise one. Hubble has already changed our vision of the Universe. We Together with the scientific success of Hubble, ESA can also are looking forward to a second brilliant decade of Hubble be proud of the excellence of its technological and opera- discoveries! tional contributions: the Faint Object Camera, the Solar Arrays, the scientists working at the Space Telescope Science Institute and at the Space Telescope European Coordinating R.M. Bonnet Facility and last, but not least, the professional job done by ESA Director of Science its astronauts during the servicing missions to Hubble. In all 4 “...the Hubble Project has been, and remains a great ESA success!” “We are all looking forward to a second Brilliant Decade of Hubble discoveries!” The Helix nebula. 5 . 1 M S , 2 C P Overview F W h t i w ) e r e h ( 1 C P F W g n i g n About Hubble Overview a About Hubble Instruments h c x E he Universe is gloriously transparent. From its earliest days Hubble has been designed as a perma- The Near Infrared Camera and Multi-Object Spectrometer nent space-based observatory that can be serviced by the NICMOS can take infrared images and make spec- Visible light can travel across it unchanged Space Shuttle. These Servicing Missions allow astronauts to troscopic observations of astronomical targets. NICMOS for billions of years, but in the last few . replace and update the science instruments on board. detects infrared light invisible to human eyes with wave- A 3 M S lengths between 8000 to 25000 Ångstroms. NICMOS is Hubble’s complement of science instruments currently inclu- T , e microseconds before the light arrives at telescope s a e l currently not in use and awaiting a new cooling system to e des two cameras, two imaging spectrographs and fine gui- r r e mirrors on Earth it passes through our turbulent t f be installed on the next Servicing Mission (3B). a dance sensors (used for astrometric observations). t s u j e atmosphere and the fine cosmic details are blurred. We l Hubble’s position outside the Earth’s atmosphere enables b b u The Faint Object Camera H these science instruments to produce high resolution images see the same effect with the naked eye when we watch of astronomical objects. Ground-based telescopes can seldom FOC was built by the European Space Agency. It is an stars twinkling in the dark night sky. provide resolution better than 0.5-1.0 arc-seconds, except optical and ultraviolet camera able to count individual briefly, under the very best observing conditions. Hubble’s photons (light particles) as they arrive. The sharpness of resolution is about 10 times better, or 0.05 arc-seconds. the images obtained by FOC is the highest achievable Putting a telescope into space is one way of evading with the Hubble instruments and greater than that of the WFPC2 camera. this problem. The Hubble Space Telescope, a joint Wide Field Planetary Camera 2 NASA/ESA project, has already made some of the WFPC2 is Hubble’s workhorse camera. It records ima- The Fine Guidance Sensors most dramatic discoveries in the history of astronomy. ges through a selection of 48 colour filters covering a Hubble has three Fine Guidance Sensors (FGS) on board. spectral range from the far-ultraviolet to visible and Two of them are used to point and lock the telescope onto Named after the American scientist Edwin Hubble, near-infrared wavelengths. WFPC2 has produced most the target and the third can be used for astrometry, Hubble looks deep into space where some of the most of the stunning pictures that have been released as pub- making very accurate position measurements to establish stellar distances and investigate binary star systems. profound mysteries are waiting to be unravelled. From lic outreach images over the years. Its resolution and Facts excellent quality have made it the most used instrument its vantage point 600 km above the Earth, Hubble can in the first 10 years of Hubble’s life. detect light before it is distorted by the atmosphere Launch date – 24 April, 1990 Space Telescope Imaging Spectrograph with ‘eyes’ 10 times sharper than the largest ground- Launch mass – 11 110 kg Dimensions – 15.9 m long, 4.2 m diameter STIS is a versatile ‘dual purpose’ instrument using the based telescopes. Hubble also carries the biggest ultra- Solar panels – Each 2.4m x 12.1m most modern technology. It consists of a camera and a violet instrument ever flown in space, so that it can Current instruments – WFPC2, STIS, NICMOS, FOC, and spectrograph operating over a wide range of wavelengths Fine Guidance Sensors from the near-infrared region to the ultraviolet.
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