Tag Archives: stars

NASA | Fiery Looping Rain on the Sun

Eruptive events on the sun can be wildly different. Some come just with a solar flare, some with an additional ejection of solar material called a coronal mass ejection (CME), and some with complex moving structures in association with changes in magnetic field lines that loop up into the sun’s atmosphere, the corona.

On July 19, 2012, an eruption occurred on the sun that produced all three. A moderately powerful solar flare exploded on the sun’s lower right hand limb, sending out light and radiation. Next came a CME, which shot off to the right out into space. And then, the sun treated viewers to one of its dazzling magnetic displays — a phenomenon known as coronal rain.

Over the course of the next day, hot plasma in the corona cooled and condensed along strong magnetic fields in the region. Magnetic fields, themselves, are invisible, but the charged plasma is forced to move along the lines, showing up brightly in the extreme ultraviolet wavelength of 304 Angstroms, which highlights material at a temperature of about 50,000 Kelvin. This plasma acts as a tracer, helping scientists watch the dance of magnetic fields on the sun, outlining the fields as it slowly falls back to the solar surface.

The footage in this video was collected by the Solar Dynamics Observatory’s AIA instrument. SDO collected one frame every 12 seconds, and the movie plays at 30 frames per second, so each second in this video corresponds to 6 minutes of real time. The video covers 12:30 a.m. EDT to 10:00 p.m. EDT on July 19, 2012.
Music: “Thunderbolt” by Lars Leonhard, courtesy of artist.

The Most Astounding Fact About the Universe

Astrophysicist Dr. Neil DeGrasse Tyson was asked in an interview with TIME magazine, “What is the most astounding fact you can share with us about the Universe?” This is his answer.

By Schlick, who says:

Special thanks to: Reid Gower saganseries.com/
Michael Marantz vimeo.com/2822787
Carl Sagan hulu.com/cosmos
Neil deGrasse Tyson facebook.com/neiltyson
NASA nasa.gov/
…for their inspiration.

Here are some edited highlights from the original interview (full video at bottom of page):

What’s the difference between astronomy and astrophysics?
There was a day long ago when all you could do to study the universe was pull out a telescope and look up. Physics did not come of age until the late 1800s. Now any modern-day astronomer is also an astrophysicist. We use them interchangeably.

What should be done about the fact that American children lag behind kids in other countries in science and math?
We need to do something about the stigma. Somehow it’s O.K. for people to chuckle about not being good at math. Yet if I said I never learned to read, they’d say I was an illiterate dolt. You can’t look at science and math as separate. They’re fundamental to what it is to be alive because they’re all around us.

Which area of astrophysics interests you the most?

I’m fascinated by the deaths of stars and the havoc they wreak on their environments. As a public scientist, I like the subjects the public likes: the search for life, NASA missions, black holes, the Big Bang.

Do you believe in the possibility of extraterrestrial life?

Anyone who has studied the problem recognizes the likelihood that there’s life elsewhere in the universe. Now, if you want to say that there is life out there that is intelligent and built a flying saucer and traversed the galaxy to come here and land on Earth and be spotted by people who see lights in the sky … okaaay.

What is your favorite part of the work you do?

When someone comes up to me with a question about the universe. And I reply. And I see the person’s eyes light up because they learned something new.

You talk about events that can cause the end of the world. Does this keep you up at night?
Yes! If it doesn’t keep you awake at night, what’s wrong with you? However, it might keep me awake in a different way. I think of ways to prevent them from happening.

How long do you think it will be until we colonize other planets?
Do you know that Antarctica is balmier and wetter than the surface of Mars? Yet I don’t see people lining up to build condos in Antarctica. So how long? A thousand years. Never. We can visit them. But to land there and say, “What an oasis!”–not anytime soon.

If you could meet any scientist who ever lived, who would it be?

Isaac Newton. No question about it. The smartest person ever to walk the face of this earth. The man was connected to the universe in spooky ways. He discovered the laws of motion, the laws of gravity, the laws of optics. Then he turned 26.

What is your favorite science-fiction movie, and in that movie, what science is plausible?
Deep Impact and Contact. They spent a lot of time getting the science right. I’m on a crusade to get movie directors to get their science right because, more often than they believe, the science is more extraordinary than anything they can invent.

Do you think that man is fully capable of understanding the universe’s design?
I lose sleep at night wondering whether we are intelligent enough to figure out the universe. I don’t know.

Watch how he talks about Isaac Newton:

I love to see passion like this for learning. Makes me want to be better at EVERYTHING.