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Fwd = Universe Today #581 - July 31, 2002

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  • Frits Westra
    Forwarded by: fwestra@hetnet.nl (Frits Westra) Originally from: Universe Today Original Subject: Universe Today #581 - July 31,
    Message 1 of 1 , Jul 31, 2002
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      Forwarded by: fwestra@... (Frits Westra)
      Originally from: "Universe Today" <info@...>
      Original Subject: Universe Today #581 - July 31, 2002
      Original Date: Tue, 30 Jul 2002 21:58:50 -0700

      ========================== Forwarded message begins ======================

      the
      U N I V E R S E
      T O D A Y

      Space Exploration News From Around the Internet
      Updated Every Weekday.

      July 31, 2002 - Issue #581
      http://www.universetoday.com
      info@...

      An HTML version including pictures is available at:
      http://www.universetoday.com

      **************************************

      -- UNIVERSE TODAY STORY SUMMARY --

      * Evidence Found for Early Earth Bombardment
      * Keeping Mars Clean of Earth Bugs
      * Canadian X-Prize Entrant Moves Closer to Spaceflight
      * Scramjet Prototype Has a Successful Flight


      EVIDENCE FOUND FOR EARLY EARTH BOMBARDMENT
      -------------------------
      Researchers from the University of Queensland have discovered evidence
      they believe proves that the Earth was bombarded by meteorites 4 billion
      years ago. Although these impacts are clearly visible on the Moon,
      movement the Earth's tectonic plates have obscured the evidence here. The
      team analyzed 3.8 billion year old rocks from Greenland, and found
      anomalies in the element tungsten; exactly the same as those found in
      meteorites.

      http://www.uq.edu.au/news/index.phtml?article=3374
      Jul 30, 2002, 9:29pm


      KEEPING MARS CLEAN OF EARTH BUGS
      -------------------------
      One concern engineers have when designing space missions is how to ensure
      our spacecraft don't bring along unexpected microorganisms when they reach
      a distant planet. There are strict international rules to avoid
      contamination, so engineers use several techniques to keep their
      spacecraft clean: sterilization through heat, vacuum, alcohol, irradiation
      with ultraviolet light and other kinds of radiation. Once they're done,
      engineers hope to have less than 300,000 microorganisms in the Beagle 2,
      due for launch in 2003. That sounds like a lot, but there are several
      billion wee beasties on even the cleanest kitchen floor.

      http://www.esa.int/export/esaCP/ESAUB676K3D_index_0.html
      Jul 30, 2002, 9:14pm


      CANADIAN X-PRIZE ENTRANT MOVES CLOSER TO SPACEFLIGHT
      -------------------------
      A Canadian team competing to win the $10 million X-Prize announced that
      they had completed a major milestone on their entrant, the Canadian Arrow.
      The team performed a successful test burn of their prototype engine and
      believe it will now work in actual flight - a main engine test could
      happen as early as August. Twenty one teams from 5 countries are competing
      for the X-Prize, which will award $10 million to the first group able to
      launch a three-person rocket twice in two weeks to an altitude of 100 km.

      http://www.canadianarrow.com/
      Jul 30, 2002, 9:02pm


      SCRAMJET PROTOTYPE HAS A SUCCESSFUL FLIGHT
      -------------------------
      A new jet designed to travel more than 7 times the speed of sound has been
      successfully tested in the Australian desert. The prototype Hyshot engine
      is a scramjet; unlike a traditional chemical rocket which carries heavy
      liquid oxygen in gigantic fuel tanks, a scramjet pulls the oxygen it needs
      from the atmosphere. The engine was strapped to a traditional rocket and
      lifted up to an altitude of 300 km at which point the scramjet kicked in
      and accelerated it towards the Earth - hopefully reaching a speed of 8,600
      km/hour before it crashed.

      http://www.uq.edu.au/news/index.phtml?article=3414
      Jul 30, 2002, 8:47pm


      -------------------------

      All contents copyright (c) 2002 Universe Today

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