Category Archives: starbirth

Astronomy’s Outpouring

Imagine that our Milky Way Galaxy is being warped by the action of a neighboring galaxy. Or that the steady North Star Polaris (the one we’ve all been taught as our navigational guide in the sky) has a companion so small that it was only recently we could see it through the powerful eye of Hubble Space Telescope. Or that a small galaxy is slowly being gobbled up by our own galaxy? Or that astronomers can now “see” down to within a few light-years of a supermassive black hole at the heart of another galaxy? Or that, if you have a little extra duty cycle left on your home computer, you can help astronomers find interstellar dust grains?

All this, and a whole lot more is pouring out of the informational firehouse at the 207th meeting of the American Astronomical Society this week in Washington, D.C. More than 3,000 of the world’s astronomers (about a third of the astronomy community) is convening here and it is my pleasure to be attending as well. There are more papers and talks than you can shake a stick at. I am sitting here in the press room surrounded by some of the best science writers and reporters in the business — in fact, I’m parked next to Phil Plait, the bad boy behind the The Bad Astronomy web page and blog. His viewpoint on all things astronomy is always a little bit hip and ironic (okay, a LOT hip and ironic).

There are a record 11 press conferences at this meeting, and I’m going to be at all but one of them (have to leave early to go home and teach (more on THAT in another entry)).

So, if you’ve been looking at the paper or perusing CNN.com, you’ve likely seen the stories about the death spiral of material into the heart of a galaxy, and the story about the companion to Polaris. So, what else is there? I’ll be presenting a few of the cooler papers here in the next few days, and I want to start with a pretty picture.

Starbirth in the Magellanic Clouds
Starbirth in the Magellanic Clouds

This is a lovely image released by the National Optical Astronomy Observatory of glowing clouds of gas in a starbirth region in the Magellanic Clouds. Astronomers have assembled a huge mosaic of images of this region, which you can see and read about at their website (click on the link under the picture for more of the story and more pictures). Imaging and studying such regions help astronomers understand the mechanics of star formation — one of the most fascinating topics in astronomy.

Okay, I’ll be back later with more goodies. For now, it’s time to go to a press conference!

Feast Your Eyes on Starbirth

Courtesy Hubble Space Telescope
Courtesy Hubble Space Telescope

I am a sucker for starbirth regions. This past week while working on the Griffith Observatory exhibit project, I was browsing around various observatory websites, looking for smacking good images of starbirth regions. While we were looking for some specific objects inside stellar nurseries, I couldn’t help but be dazzled by this one (although we ended up not using it).

What we’re seeing here is a snapshot in time well into the birth process of hot young stars, and as an added bonus, a scattering of smaller young stellar objects which haven’t quite started to convert hydrogen to helium in their cores. All the newborn objects in these clusters are embedded in their birth cloud of gas and dust, giving us a pretty nice look at several stages in the formation process of stars. The dark dust clouds could be harboring more incipient stars, but they’re being eaten away by radiation from the brightest nearby stars. So, if there ARE any about-to-be-born stars in the clouds, their gas and dust supply may get vaporized by the hot winds blowing off the older stellar siblings.

To read more about this beautiful starforming region, go here.

The stars in this image are more massive that our Sun. But, you kinda have to wonder what our own neck of space looked like when the Sun was being born. AS we all know, it formed about 4.5 billion years ago in a cloud of gas and dust, probably along with a bunch of stellar siblings.

As it turns out, the Spitzer Space Telescope has a great image of sunlike stars in formation. Check it out.

NGC 1333 as seen by Spitzer Space Telescope
NGC 1333 as seen by Spitzer Space Telescope

This is quite a bit more interesting because this could well be what we looked like, way back when. The wisps of material are shock fronts in the stellar birth cloud that are carved out by jets streaming from the stellar newborns. What we’re seeing here is an infrared view, not what our eyes would detect. But, Spitzer excels in looking at the glow of infrared radiation emitted by hot young objects that are warming up the nearby clouds of gas and dust. If you want to look at this picture in more detail, go here and click on one of the larger images.

See why I love these regions? They just excite the eye—and the imagination!