A Rose From Space

This Spitzer Space Telescope image was obtained with an infrared array camera sensitive to invisible infrared light at wavelengths that are about ten times longer than visible light. In this four-color composite, emission at 3.6 microns is depicted in blue, 4.5 microns in green, 5.8 microns in orange, and 8.0 microns in red. The image covers a region that is about one quarter the size of the full moon.
This Spitzer Space Telescope image of a stellar nursery was obtained with an infrared array camera sensitive to invisible infrared light at wavelengths that are about ten times longer than visible light. In this four-color composite, emission at 3.6 microns is depicted in blue, 4.5 microns in green, 5.8 microns in orange, and 8.0 microns in red. The image covers a region that is about one quarter the size of the full moon.

This is kind of cool. The folks at Spitzer Space Telescope have caught onto the “positive PR spin” thing pretty well and have issued a lovely picture of a rosebud-shaped stellar nursery called NGC 7129. Smack in the middle of the bud is a cluster of newborn stars, and all of this loveliness lies about 3,300 light-years away in the constellation Cepheus. There are about 130 young stars here, all formed from a huge cloud of gas and dust.

Here’s what the Spitzer folks have to say about their discovery:

    “As in any nursery, mayhem reigns. Within the astronomically brief period of a million years, the stars have managed to blow a large, irregular bubble in the molecular cloud that once enveloped them like a cocoon. The rosy pink hue is produced by glowing dust grains on the surface of the bubble being heated by the intense light from the embedded young stars. Upon absorbing ultraviolet and visible-light photons produced by the stars, the surrounding dust grains are heated and re-emit the energy at the longer infrared wavelengths observed by Spitzer. The reddish colors trace the distribution of molecular material thought to be rich in hydrocarbons.

    The cold molecular cloud outside the bubble is mostly invisible in these images. However, three very young stars near the center of the image are sending jets of supersonic gas into the cloud. The impact of these jets heats molecules of carbon monoxide in the cloud, producing the intricate green nebulosity that forms the stem of the rosebud.

    Not all stars are formed in clusters. Away from the main nebula and its young cluster are two smaller nebulae, to the left and bottom of the central “rosebud,” each containing a stellar nursery with only a few young stars.

    Astronomers believe that our own Sun may have formed billions of years ago in a cluster similar to NGC 7129. Once the radiation from new cluster stars destroys the surrounding placental material, the stars begin to slowly drift apart. “

Happy Valentine’s Day!

Orbital moon rise
Orbital moon rise

During the December 1999 servicing mission of the Hubble Space Telescope, astronauts aboard the Space Shuttle Discovery recorded a magnificent image of the full Moon partially obscured by the atmosphere of Earth. It’s rare to see the Moon this way, even from space (so they tell me), so when I ran across this during a recent archive search, I downloaded the image immediately for my collection. I love going through the image archives because they are such a valuable record of the achievements people have made in space. I fear that the way things are going, what with the cancellation of the next servicing mission to HST, plus the emphasis on Moon and Mars missions that seem to be driven more by political ambition than good science returns, the scenes recorded in NASA’s vast image collections may not be repeated for a long time.

Mind you, I have no problems with missions to the Moon and Mars, or even to the stars. We should have been doing them all along and by now we should have places to visit and study on the Moon. But, history and politics and Earth-based problems have taken their toll on the space program in many ways. That’s the reality of big “public works” projects, no matter what they are and which country is funding them. They are a mix of hopes and dreams and scientific goals and political realities and cultural mindsets and human fears and emotions. Sometimes I think it’s a wonder huge projects get done at all, except that I know how teamwork can advance even the most difficult objectives.

And so it is with space exploration. We will get out there. The big questions remain to be answered. When? How? Who will go? Who will pay? Who will benefit? How can humans team up to make the scientific, cultural, political, and financial advancements necessary to accomplish the goals? Big questions, all of them. They loom over our future in space like a huge nearly full Moon, bright and shiny and beckoning. It’s a challenge in a way, and it’s one from which I hope we do not back down.

Exploring Science and the Cosmos

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