Star Birth and other Goodies

and the Astronomer’s Universe

A few months ago I started creating special episodes for a segment called The Astronomer’s Universe, which is webcast on Astrocast.tv — a video cast that covers an amazing amount of info about astronomy and space science topics. This month (July), I covered star birth in a short segment titled (aptly enough) Starbirth, which you can watch below.

The process of star formation fascinates me. And, it is keeping a lot of astronomers very involved in figuring out the way the births of stars unfold. The general picture is pretty well known — that is, that a cloud of gas and dust begins to coalesce to form a star at its heart. After some time passes, a star is born, and if there’s enough material left over, planets may form.  The details of starbirth have long been hidden in the clouds of gas and dust, so when astronomers found a way to peek through the clouds (using infrared- and radio-sensitive instruments, for example), they began to see the intricate parts of the process. Now they are working to explain the process in greater detail and I think that over the next few years we’ll see a pretty complete explanation of just how it is that stars begin their lives.

That’s the story I tell (along with some nice images) over at Astrocast.tv.  And, as they say on late-nite TV, there’s more!  You can see some great segments from my producing colleagues at Astrocast.tv covering night sky gazing, the study of our own planet, and an exclusive look at the opening of Spaceport America a week or so back.  Check it all out!

Warm Weather

Mars-style

We’ve arrived at our destination pretty much safe and sound — thanks to all of you who wrote to wish us well.  I was going through all the news that’s piled up while we were on the road, and noticed a story about “warm” weather on Mars and how some landforms show evidence of freeze-and-thaw cycles that indicate warmer weather sometime in the past. Very interesting and a great object lesson in what you can learn by studying landforms.

Driving across the landform that is the Great Plains of the United States, I couldn’t help but think about how millions of years ago the whole area was under an ocean. The landform is gentle and and rounded, with a few hills here and there. Of course, we went through some of our own “warm” weather the past few days — sweltering temps and some pretty severe storms. Those are short-term compared to the long-term existence of things like oceans in the past or the yearly freeze-thaw cycle on Mars that spurred the recent finding.  But, it’s all planetary science — and it’s all still in the landforms, if you know how and where to look!

Exploring Science and the Cosmos

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