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Recent Podcast
A Tour of The Big, Bad & Beautiful Universe with Chandra
A Tour of The Big, Bad & Beautiful Universe with Chandra
To celebrate the 15th anniversary of NASA's Chandra X-ray Observatory, we have released four new images of supernova remnants. These show Chandra's ability to study the remains of supernova explosions, using images that are the sharpest available in X-ray astronomy. The images of the Tycho and G292.0+1.8 supernova remnants show how Chandra can trace the expanding debris of an exploded star. The images show shock waves, similar to sonic booms from a supersonic plane, that travel through space at speeds of millions of miles per hour. The images of the Crab Nebula and 3C58 show the effects of very dense, rapidly spinning neutron stars created when a massive star explodes. These neutron stars can create clouds of high-energy particles that glow brightly in X-rays. The image for G292 shows oxygen (yellow and orange), and other elements such as magnesium (green) and silicon and sulfur (blue) that were forged in the star before it exploded. For the other images, the lower energy X-rays are shown in red and green and the highest energy X-rays are shown in blue. (2014-07-22)


NGC 2392: Circus in the Sky

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Narrator (April Hobart, CXC): Before the telescope was invented in the 17th century, people thought that the Earth was the center of the Universe. They thought the Sun, the planets and all the stars revolved around us! It was only when we had the technology to peer deeper into space that we realised that not only does the Earth move around the Sun, but the Sun moves around the center of our galaxy, the Milky Way!

In the last 100 years, telescopes have been advancing at an unbelievable rate. Now we have huge radio telescopes that stretch over 50 kilometers, and we even have telescopes that have been launched into space. With these powerful instruments, we can reveal the secret wonders of the Universe that our ancestors never dreamed of!

Take this picture, for example, it shows a planetary nebula, which is the remains of a star that is blowing itself apart. This one is called the "Clownface Nebula", can you see why? It looks like a clowns head, complete with a crazy hairstyle and a big, shiny nose at the center.

This object was first spotted in 1757, but today we are still discovering new details about it. Shown in purple is gas at a temperature over a million degrees. The red, green and blue pattern shows the ejected outer layers of the exploded star. Much more recently, astronomers realized that a very hot pair of stars may live at the center of this gassy cloud, and they are orbiting each other!

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