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What's it like to visit the <a href="/earth/Water/deep_ocean.html&dev=">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&dev=">Alvin</a>, makes dives into the deep sea. Check out a <a href="/people/postcards/alvin/photo_album.html&dev=">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&dev=">penguin research campaign</a> in December 2006 - January 2007.<p><small><em>Image courtesy of <a href="/bio/jean_pennycook.html&dev=">Jean Pennycook</a></em></small></p>A sinuous glowing band of <a href="/earth/Magnetosphere/aurora.html&dev=">aurora</a> (the Aurora Australis or Southern Lights) loops around the <a href="/earth/polar/polar_south.html&dev=">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&dev=">Aurora are produced</a> when <a href="/physical_science/physics/atom_particle/particle_radiation.html&dev=">energetic particles</a> entering the Earth's atmosphere from space interact with <a href="/physical_science/physics/atom_particle/atom.html&dev=">atoms</a> and <a href="/earth/geology/molecule.html&dev=">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&dev=">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&dev=">ultraviolet</a> part of the <a href="/physical_science/magnetism/em_spectrum.html&dev=">electromagnetic spectrum</a>. The Sun is now entering another period of <a href="/sun/solar_activity.html&dev=">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&dev=">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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Space Weather

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News

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Research Highlights

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Multimedia

Here you will find links to all sorts of pictures, animations, videos, sounds, and interactive ...Read more

Postcards from the Field

Explore collections of Postcards from the Field, virtual postcards from scientists and educators ...Read more

Citizen Science

Citizen science projects involve the public in scientific research and data collection. Typically, ...Read more

Motivational Quotes

Everyone needs some inspiration sometime! Here are some quotes that you may enjoy, or find useful in your work, play, or everyday life. ...Read more

Historical Events

Full Earth and Space Science    History Calendar (Members only)

Teacher Opportunities

Full Teacher Events Calendar (Educator Members only)

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Earth and Space Science Concept of the Day

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Cirque
xCirque : A semicircular basin excavated by glaciers in mountain top regions; may contain a lake

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Research Highlights

Deadly Tonga Earthquake Revealed as Three Big Quakes

A magnitude-8.1 earthquake and tsunami that killed 192 people last year in Samoa, American Samoa and Tonga was in fact a triple-whammy. The 8.1 "great earthquake" concealed and triggered two...Read more


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