The Blue Sun

Posted by Alex in Pictures, Science & Tech on November 4, 2009 at 1:36 pm


Image: Alan Friedman of Averted Imagination

Alan Friedman, a greeting cards-maker by day and astronomer by night, took this amazing photo of the Sun. APOD explains why it’s blue:

Our Sun may look like all soft and fluffy, but it’s not. Our Sun is an extremely large ball of bubbling hot gas, mostly hydrogen gas. The above picture of our Sun was taken last month in a specific red color of light emitted by hydrogen gas called Hydrogen-alpha and then color inverted to appear blue. In this light, details of the Sun’s chromosphere are particularly visible, highlighting numerous thin tubes of magnetically-confined hot gas known as spicules rising from the Sun like bristles from a shag carpet. Our Sun glows because it is hot, but it is not on fire. Fire is the rapid acquisition of oxygen, and there is very little oxygen on the Sun. The energy source of our Sun is the nuclear fusion of hydrogen into helium deep within its core. No sunspots or large active regions were visible on the Sun this day, although some solar prominences are visible around the edges.

For a larger pic, be sure to check out APOD: Link

 
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Amazing Picture of the Sun

Posted by Queuebot in Science & Tech on May 15, 2009 at 7:18 pm

Astrophotographer Thierry Legault took what is probably one of the most incredible photographs of the Sun. What’s the big deal about the big yellow ball? Look closely:

OK, so you look at it and say, “So what? It’s a picture of the quiet Sun seen in overcast conditions. Big deal!”

Ah, but a big deal it is. See those spots in the lower left quadrant of our nearest star? Those aren’t sunspots… here, let me show you what those are:
Yes, that is in fact the Space Shuttle Atlantis silhouetted against the Sun. But wait, there’s something else, isn’t there. What’s that spot below the Shuttle?

That, me droogs, is the Hubble Space Telescope. Perhaps you’ve heard of it.

Holy Haleakala!

Link – via google

From the Upcoming ueue, submitted by mrsmojorisin.

 
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Never Ending Sun

Posted by Miss Cellania in Travel & Places, Video Clips on May 11, 2009 at 10:19 am


(YouTube link)

Summer in the Arctic Circle means 24-hour daylight. The sun doesn’t set; it just bounces along the horizon! This time-lapse video covers a week of Arctic summertime. Music by Avi Hochberg. -via baszkocsgenyfas

 
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The Life of a Star

Posted by Ali S. in Science & Tech, Video Clips on February 19, 2009 at 4:21 pm


[YouTube - Link]

A fascinating video clip depicting the 12 billion years life cycle of a Class G type star in 6 minutes (actually 6:29). From its conception, birth, death – and the deaths of surrounding celestial bodies – and then its remnants contributing to the growth of future stars and planets are all shown. No narration just great music and animation so sit back and relax.

* Interesting note for those who don’t know: our Sun (Latin name Sol) is a Class G type star.

 
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Pac-Man Sun: Om Nom Nom Nom ...

Posted by Alex in Funny, Pictures on February 1, 2009 at 2:10 am

Armando Lee of the Astronomical League of the Philippines, F. Naelga Jr., and 100 Hours of Astronomy took this fantastic photo of a partial eclipse of the Sun over Manila Bay, which was showcased on APOD. I couldn’t resist putting on the obvious googly eyes … Come on, you know you’re thinking it too!

 
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Scientists Set to Ignite a Tiny Man-Made Star

Posted by Alex in Science & Tech on December 31, 2008 at 2:44 am


Photo: Lawrence Livermore National Laboratory

Scientist at the National Ignition Facility in Livermore, California, are getting ready to do something spectacular: ignite a tiny man-made star inside a lab and trigger a thermonuclear reaction!

Scientists at the National Ignition Facility (NIF) in Livermore, nestled among the wine-producing vineyards of central California, will use a laser that concentrates 1,000 times the electric generating power of the United States into a billionth of a second.

The result should be an explosion in the 32ft-wide reaction chamber which will produce at least 10 times the amount of energy used to create it.

"We are creating the conditions that exist inside the sun," said Ed Moses, director of the facility. "It is like tapping into the real solar energy as fusion is the source of all energy in the world. It is really exciting physics, but beyond that there are huge social, economic and global problems that it can help to solve."

Inside a structure covering an area the size of three football pitches, a single infrared laser will be sent through almost a mile of lenses, mirrors and amplifiers to create a beam more than 10 billion times more powerful than a household light bulb.

Igniting a tiny man-made star, what could go wrong? Seriously though, this is pretty nifty: Link | National Ignition Facility website | video clip at Wired Science

Is it time for an I Survived the Tiny Man-Made Star T-shirt yet? (Much in the line of our I Survived the Large Hadron Collider T-shirt)

 
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