Category Archives: space weather

Astronomy outreach, astronomy research, space weather

Space Weather FX

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Episode 2

The second in our series of videos (vodcasts) on space weather has gone live on the MIT Haystack Observatory Web site. We are currently working on a third episode to be out in early October. The series teaches about space weather and its effects on our planet and our technology.

This second episode is just about 4 minutes long and talks about the main ingredients of space weather:  magnetic fields and plasmas.  It was a challenging one to produce because I wanted to find a suitable-level model of magnetic field generation inside our own planet, and finally ended up creating my own. I also ended up creating a basic little visual sequence about how plasmas form.

Episode 1 is an introduction and is 6.5 minutes long. Both star scientist Philip J. Erickson (who is an atmospheric researcher at MIT Haystack) and yours truly gets to do the voice-over work. The episodes are aimed at about a 5th or 6th grade level and are ideal for classroom or home use. They’re accompanied by a page of links for further investigation, and we’re working on getting closed-captioning versions ready, as well. Eventually we’ll get an evaluation form up there, so if you’re a teacher and you’re using these, we’ll be interested in your feedback. Check ’em out!

astronomy, atmospheric science, space weather

Your Friend, the Ionosphere

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Comes to a GoogleEarth Program Near You!

The ionosphere — it’s a layer of ionized gases at the top of Earth’s atmosphere, and something we don’t think about too much unless it gets all muddled up by disturbances from the Sun. When that happens, we see auroral displays and also can experience periodic outages in radio communications, GPS reception, and power systems.

Ham radio operators use the ionosphere to “propagate” radio signals around the world, and as it turns out, so do aircraft that fly over the poles (and out of reach of communications satellites). There are a great many scientists around the world who study the ionosphere, including the people I work with at MIT Haystack Observatory.

Now, through the auspices of the Communication Alert and Prediction System folks, you can explore a 4-D model (visualization) of the ionosphere using GoogleEarth.  Today, at the Space Weather Workshop in Boulder, Colo., NASA-funded researchers released to the general public a new “4D” live model of Earth’s ionosphere. Without leaving home, anyone can fly through the dynamic layer of ionized gases that encircles Earth at the edge of space itself. All that’s required is a connection to the Internet. Airline flight controllers, for example, can use this tool to plan long-distance business flights over the poles, saving money and time (and boosting safety) for flyers.

In a kind of cool “blast from the past” I note that an old friend and graduate school officemate of mine, Lika Guhathakurta (a NASA solar physicist) was the one doing the announcing in Boulder. So, go read about the ionosphere at the links above, and then check out the latest ionospheric data and see what’s fascinating Lika and the other astronomers who make it their business to study the ionosphere!