Cosmic Zit

By
Cross posted at Say Anything: Reader blogs.

Rather than blog about the various interesting reactions to the recent news that removing thimerosal from vaccines hasn't had the expected effect on rates of autism or to the new studies that have identified different genes involved in autism I decided to browse the galleries at HubbleSite. A much more relaxing, up lifting, and perspective correcting exercise.



I call this image the Cosmic Zit. NASA calls it, Outburst from Comet Tempel 1. "In a dress rehearsal for the rendezvous between NASA's Deep Impact spacecraft and comet 9P/Tempel 1, the Hubble Space Telescope captured dramatic images of a new jet of dust streaming from the icy comet. The images are a reminder that Tempel 1's icy nucleus, roughly half the size of Manhattan, is dynamic and volatile."



They call this one the Cat's Eye Nebula. That's a fanciful enough description for me. "Observations suggest the star ejected its mass in a series of pulses at 1,500-year intervals. These convulsions created dust shells, each of which contain as much mass as all of the planets in our solar system combined (still only one percent of the Sun's mass). These concentric shells make a layered, onion-skin structure around the dying star."



This Red Prism In The Heavens is also known as Dying Star HD 44179, the "Red Rectangle," Sculpts Rungs of Gas and Dust. This ancient dying star has an interesting story. "The star in the center of the Red Rectangle is one that began its life as a star similar to our Sun. It is now nearing the end of its lifetime, and is in the process of ejecting its outer layers to produce the visible nebula. The shedding of the outer layers began about 14,000 years ago. In a few thousand years, the star will have become smaller and hotter, and will begin to release a flood of ultraviolet light into the surrounding nebula; at that time, gas in the nebula will begin to fluoresce, producing what astronomers call a planetary nebula."

This star stared dying 14,000 years ago. It's got several thousand years to go before it's done. I wonder what humanity was doing 14,000 years ago? What will we be doing when this star is finally done with dying?

Comments

Post a Comment

Popular Posts

What's in a flower?

By
Specifically hydrangea flowers. In this post I pointed out that anthocyanin (a family of plant pigments) appears blue at high pH, red at low pH and is responsible for the wide variety of colours in hydrangea flowers. Ilona pointed out that , "in hydrangeas you lower the ph for blue flowers (more acid) and raise it for pink (more alkaline)." I did a bit of checking and found that this is the case . At lower soil pH hydrangea flowers do appear blue and at higher soil pH they appear red. But soil pH is not the only thing that affects the colour of hydrangea flowers. It appears that pH inside the plant cell has an affect as well: Sepal Color Variation of Hydrangea macrophylla and Vacuolar pH Measured with a Proton-Selective Microelectrode Anthocyanin changes its color depending on pH (Goto 1987, Brouillard 1988, Goto and Kondo 1991). In strong acidic conditions it shows red, in neutral, purple and in alkaline, blue. But generally the vacuolar pH of plant cells is weakly aci
Read more

Treating autism as traumatic brain injury

By
I've been doing research into autism, dyspraxia, how the normal brain works, and how an autistic/dyspraxic brain works (or doesn't work). Traumatic injury to different parts of the brain can cause the same problems suffered by autistic and dyspraxic children. Compare this list of the functions of different parts of the brain and the problems caused by injuries to those areas with these descriptions of dyspraxia and autism. What is Developmental Dyspraxia? Developmental dyspraxia is a disorder characterized by an impairment in the ability to plan and carry out sensory and motor tasks. Generally, individuals with the disorder appear "out of sync" with their environment. Symptoms vary and may include poor balance and coordination, clumsiness, vision problems, perception difficulties, emotional and behavioral problems, difficulty with reading, writing, and speaking, poor social skills, poor posture, and poor short-term memory. Although individuals with the disorder may b
Read more

Battlestar Galactica needs more colour?

By
Here are the letters I mentioned in the previous post. The one that started it (I'm guessing these letters were written after the show's first airing at the end of 2003): Galactica Needs More Diversity The problem I had with Battlestar Galactica was there were no major and very few minor African American characters. There were no Black men in the show at all or if they were, they had virtually no screentime. In the original series, Boomer and Tigh were both played by African American actors. In this rendition of Battlestar, those characters were played by Asian and White actors. In the Caprica city, there no African American extras. On the Galactica's bridge, there was only one African American actress. Another Black actress could be found playing a religious official that swore in the new President of the colonies. This was very troubling to me. Do you not want African Americans to watch your show? Do you want to project the idea that African Americans are not part of the
Read more