This Fluffy Ball Contains The Story Of The Universe

More than 10 thousand years ago, a star in our galaxy exploded. The light from this explosion didn't reach Earth until 1572, when the astronomer Tycho Brahe saw a burst of brightness in the night sky and mistook it for a new star being born. We now know that this flare was actually a white dwarf star going supernova—a violently explosive wave of energy and matter that a star emits as it dies. Nearly 500 years later, the imprint of that explosive burst is still visible—and it's very fluffy.
Last week, NASA released the latest image of Tycho's supernova remnant (also called "Tycho"). The photo, taken by the Chandra X-Ray Observatory, looks a bit like an opalescent dandelion.
"You look at this image, and it sort of looks like it's cotton candy," says Brian Williams, a NASA astronomer who helped take the latest photograph of the supernova remnant. Scientists use these cosmic fireworks to understand and test theories of supernovae. Currently, astronomers don't know all that much about how supernovae form, Williams adds, or how the explosion progresses. Further, understanding the mechanism creates the outburst's distinctive shape— described as "fluffy" and "clumpy"—has been particularly baffling.
Tycho is classified as a Type 1a supernova—it underwent a massive thermonuclear explosion, letting off a shockwave that moved at almost 3,100 miles per second. The wave hit nearby gas and dust, heating the air and particles by millions of degrees. The human eye can’t pick up on any of this action, but the activity shines bright in X-ray photographs (X-rays have higher energy than visible light, and tend to come from extremely hot objects, like black holes, galaxy clusters, and supernovae). This image of Tycho "is visually striking, and also scientifically meaningful," says Gilles Ferrand, a physicist who uses data to build 3D visualizations of supernovae. "It's not the first time we got an image from Tycho. But there's something new in this image that's interesting."
That “new” thing is the blue and red in the center of the photo. Most of the colors in the shot—red, yellow, cyan, navy blue, purple, and orange—represent different energy levels as viewed through the x-ray telescope (red and yellow being the lowest, orange and purple being the highest). In this new photo of Tycho, scientists were also able to isolate and visualize a specific element: silicon—the clumps of blue in the center represent the silicon moving toward us, and the red is the silicon moving away.

By: Abhishek Singh
Content: https://www.popsci.com/star-supernova-fluffy/