Doesn't this look like the cosmic equivalent of a field of irises? Perhaps that's why this cloud of gas and dust is called the Iris Nebula.
NASA released this image today and explains:
The striking blue color of the Iris Nebula is created by light from the bright star SAO 19158 reflecting off of a dense patch of normally dark dust. Not only is the star itself mostly blue, but blue light from the star is preferentially reflected by the dust -- the same affect that makes Earth's sky blue. The brown tint of the pervasive dust comes partly from photoluminescence -- dust converting ultraviolet radiation to red light. Cataloged as NGC 7023, the Iris Nebula is studied frequently because of the unusual prevalence there of Polycyclic Aromatic Hydrocarbons (PAHs), complex molecules that are also released on Earth during the incomplete combustion of wood fires. The bright blue portion of the Iris Nebula spans about six light years. The Iris Nebula, pictured above, lies about 1300 light years distant and can be found with a small telescope toward the constellation of Cepheus.
Image credit: NASA
Swipe right to make the connections that could change your career.
Swipe right. Match. Meet over coffee or set up a call.
No, we aren't talking about Tinder. Introducing Shapr, a free app that helps people with synergistic professional goals and skill sets easily meet and collaborate.
The Canadian professor has an extensive collection posted on his site.
- Peterson's Great Books list features classics by Orwell, Jung, Huxley, and Dostoevsky.
- Categories include literature, neuroscience, religion, and systems analysis.
- Having recently left Patreon for "freedom of speech" reasons, Peterson is taking direct donations through Paypal (and Bitcoin).
Best case: Redrawing borders leads to peace, prosperity and EU membership. But there's also a worst case.
Despite incredible economic growth, it is not necessarily an investor's paradise.
- China's stock market is just 27 years old. It's economy has grown 30x over that time.
- Imagine if you had invested early and gotten in on the ground floor.
- Actually, you would have lost money. Here's how that's possible.
SMARTER FASTER trademarks owned by The Big Think, Inc. All rights reserved.