Webb Telescope budget continues to grow
Bad news for astronomers: The budget for the James Webb Space Telescope continues to swell.
Month: September 2011
Gordon Lightfoot – Canadian Railroad Trilogy
An evening pause:
Spelling negus
An evening pause: The lurking and sometimes silly taboos of our society.
The reconnaissance satellite Big Bird on display
Worth a look: The U.S. spy satellite Big Bird, the KH-9 Hexagon, will be on public display for the first time tomorrow, for only one day, in the parking lot of the Air and Space Museum’s Udvar-Hazy Center.
A Yellow Supergiant Progenitor of a Massive Star Supernova in M51
The uncertainty of science: Astronomers have determined that the star that went supernova in the Whirlpool Galaxy (M51) in June — making it the nearest supernova in 25 years — was a yellow supergiant star, not an aging red supergiant as predicted by theory. From the preprint paper:
Despite the canonical prediction that Type II supernovae arise from red supergiants, there is mounting evidence that some stars explode as yellow supergiants. A handful of Type II supernovae have been observed to arise from yellow supergiants: supernovae 1993J, 2008cn, and 2009kr. The locations of the progenitors on the Hertzsprung-Russell diagram shows clearly that these stars are not located on the predicted end points for single star stellar evolution tracks. In addition, despite arising from supposedly similar yellow supergiant progenitors, these supernovae display a wide range of properties.
The Hertzsprung-Russell diagram is a graph mapping the color of stars against their luminosity. Because color and brightness change as the star evolves over time, the graph is used by astronomers to track the birth, growth, and death of stars. That these yellow supergiants don’t appear to be at “the predicted end points for single star evolution” on the diagram is a serious problem for the theorists who have tried to explain what causes this particular type of supernova.
Which also means astronomers are still unable to tell us what stars in the sky are most likely to go supernova in the future.
Update on the repairs to the Subaru Telescope
The Subaru Telescope team has posted an update on its repair effort following a July 2nd coolant leak.
Bigelow and Boeing do airbag drop tests on Boeing manned capsule
On Monday Bigelow and Boeing completed successful drop tests in the Mohave Desert of airbags to be used during landings of the Boeing manned capsule. With video.
A Smartphone ap to weigh galaxies
Want to known how much a galaxy weighs? There is now an Android smartphone application, GalMass, for calculating it!
Washington union held in contempt for terminal violence
Union civility: A union in Washington state has been held in contempt for the violence that took place during a protest at a grain terminal. Some testimony:
Security guard Charlie Cadwell, employed by Columbia Security for patrols at the Longview grain terminal for the past two months, told the judge of the harrowing experience: Every protester he saw that night was carrying a weapon – baseball bats, lead pipes, garden tools. “I didn’t see a longshoreman who didn’t have something in his hands,” he said.
He was was pulled out of his car by one longshoreman, and another man swung a metal pipe at him, he said. “I told him, ‘You have 50 cameras on you and law enforcement is on its way,'” Cadwell said. “He said, ‘(expletive) you. We’re not here for you, we’re here for the train.'”
In the meantime, someone drove off with his car and eventually ran it into a ditch. Cadwell said about 40 to 50 people were throwing rocks at him, and that he was hit between his eyes and in his knee.
Poll suggests Feinstein in trouble in California
More troubles for Democrats: A new poll says that Democratic Senator Diane Feinstein is in trouble in California.
Koch threatens to campaign against Obama in Florida
More political problems for Obama: Former New York Mayor Ed Koch is threatening to campaign against Obama among Jewish voters in Florida.
Video from Dawn
NASA has released an update summarizing what scientists have found since Dawn went into orbit around Vesta in July. The video below, compiled from images Dawn has taken, gives a nice visual overview. The most interesting big feature, understated by the video, is the series of grooves that appear to encircle the asteroid’s equator. To my eye it almost looks like Vesta was once two asteroids that got merged into one, with these grooves indicating the weld point.
The direct link to the video can be found here.
Embedded video from
NASA Jet Propulsion Laboratory California Institute of Technology