The Brightest Supernova Ever - Jun 1, 2013

Speaking of supernovas...here's the biggest supernova explosion ever observed. It was the death of an extraordinarily massive star, but one located in a galaxy about 240,000,000 light-years away.

In fact, we have a similar star in our own galaxy, and only 7500 light-years away. You can see an image of this monster here.

Ice over the Poles - May 1, 2013

Visit this NASA Earth Observatory feature for an interesting article on ice at the Poles--both sea ice at the North Pole, and land ice on Antarctica. Be sure to see the explanation of how melting of ice sheets or glaciers can provide "positive feedback" and increase the rate of warming.

Sol Station: Sol - Apr 1, 2013

To understand the source of the sun's energy, visit The Sun's Structure and Nuclear Fusion. For much more detail, see Sol Station: Sol.

Flow Visualization - Feb 1, 2013

Check out the galleries of fluid flow images on this University of Colorado site.

Aurora over Antarctica - Jan 1, 2013

For a view from the ground of an aurora over Antarctica, check out this Astronomy Picture of the Day.

And to see an aurora video captured from the International Space Station over the Indian Ocean, click here.

Planetary and Satellite Motion - Dec 1, 2012

Check out this video to learn about satellite orbits.

For further reading, see Planetary and Satellite Motion.

The Art of Liquid Crystals - Nov 1, 2012

Enjoy the images in The Art of Liquid Crystals.

Exploratorium Magazine Online: Exploring Origami - Oct 1, 2012

Check out Exploratorium Magazine Online: Exploring Origami to learn about recent advances in the art of origami. Don't miss the video of folding interlocking rings out of one sheet of paper. Also, you'll find out how the paper crane became a symbol of peace in Japan.

Mars--NASA Explores the Red Planet: Program Overview - Sep 1, 2012

Click on Mars--NASA Explores the Red Planet: Program Overview to see the first close-up image of Mars, captured by the Mariner spacecraft in 1965, and to learn about NASA's strategy for investigating the red planet. If you click on "Science Overview," and then on "Goal 4," you can find out how NASA plans, over the next decade, to study the challenges of human spaceflight.

Surface Properties of the Moon - Aug 1, 2012

Check out Surface Properties of the Moon for more on the moon's craters and surface material.