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!
