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With over 9000 web pages and over 60 main sections of content, we can't fit it all on one web page! This page provides links to other major sections of content on Windows to the Universe. We hope you enjoy exploring these resources!
What's it like to visit the <a href="/earth/Water/deep_ocean.html&edu=elem">deep sea</a> in a manned submersible?  These postcards will share some of that excitement with you.  The submersible,  <a href="/earth/interior/alvin2.html&edu=elem">Alvin</a>, makes dives into the deep sea.  Check out a <a href="/people/postcards/alvin/photo_album.html&edu=elem">photo album</a> of images from the dive, and view the postcards below!<p><small><em>Image courtesy of Tim Killeen</em></small></p>Oh no!  It doesn't look good for these Adelie penguins in the Antarctic.  Sea ice covers the top of the ocean next to the Antarctic continent and the Ross Sea. Large cracks open up in the expanse of ice as the ice melts which allows whales to get into parts of the Ross Sea that have not been disturbed or fished for months.  Find out more about this <a href="/people/postcards/penguin_post.html&edu=elem">penguin research campaign</a> in December 2006 - January 2007.<p><small><em>Image courtesy of <a href="/bio/jean_pennycook.html&edu=elem">Jean Pennycook</a></em></small></p>A sinuous glowing band of <a
  href="/earth/Magnetosphere/aurora.html&edu=elem">aurora</a> (the Aurora Australis
  or Southern Lights) loops around the <a
  href="/earth/polar/polar_south.html&edu=elem">southern polar</a>
region in the
  distance as viewed by astronauts onboard the space shuttle on <a
  href="http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/archives/sts-39.html">STS-039</a>.   
   <a
  href="/earth/Magnetosphere/aurora/aurora_colors.html&edu=elem">Aurora are produced</a>
  when <a
  href="/physical_science/physics/atom_particle/particle_radiation.html&edu=elem">energetic particles</a>
 entering the Earth's
  atmosphere from space interact with <a
  href="/physical_science/physics/atom_particle/atom.html&edu=elem">atoms</a> and <a
  href="/earth/geology/molecule.html&edu=elem">molecules</a> in the atmosphere and
  release energy, emitted as light. <p><small><em>Courtesy of NASA, Astronaut Overmeyer and Dr. Hallinan</em></small></p>On 21 April, 2010, the Solar Dynamics Observatory captured the launch of a filament from the <a href="/sun/atmosphere/photosphere.html&edu=elem">surface of the Sun</a>.  These are the most detailed images of the Sun ever taken.  The images show light in the <a href="/physical_science/magnetism/em_ultraviolet.html&edu=elem">ultraviolet</a> part of the <a href="/physical_science/magnetism/em_spectrum.html&edu=elem">electromagnetic spectrum</a>.  The Sun is now entering another period of <a href="/sun/solar_activity.html&edu=elem">solar activity</a> after several years of a relatively quiet Sun.  Activity on the Sun varies on an <a href="/sun/activity/sunspot_cycle.html&edu=elem">cycle of about 11 years</a>.<p><small><em>Image courtesy of NASA/Solar Dynamics Observatory and AIA Consortium</em></small></p>The <a href="http://www.starcount.org">Great World Wide Star Count</a> is an international Citizen Science campaign.  The purpose of this event is to encourage everyone to go outside, look skywards after dark, count the stars they see in certain constellations, and report what they see online.  This Windows to the Universe Citizen Science Event is designed to encourage learning in astronomy! Have fun everyone!<p><small><em></em></small></p>Explorers, both from long ago and today, use journals to record where they travel and what they discover. With this <a href="javascript:wb_onclick();">online journal</a> you can keep a record of the places you have been, the things you have seen, and what you have learned within the Windows to the Universe web site!<p><small><em></em></small></p>

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF