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Comment: Technical Corrections (Score 1) 95

by Einer2 (#30379900) Attached to: New Hubble Ultra Deep Field In Infrared
The optical observations of the UDF from 2004 were conducted with the Advanced Camera for Surveys/Wide Field Channel (ACS/WFC) not the predecessor to WFC3 (Wide Field/Planetary Camera 2, or WF/PC2). Also, the optical channel of WFC3 does offer a small improvement in pixel scale (40 milliarcseconds/pixel, versus 50 mas/pix for ACS/WFC. However, the near-infrared channel (where these images were taken) only has a pixel scale of 130 mas/pix, a factor of ~2.5 worse than ACS/WFC.

(The diffraction limit of HST varies from ~50 mas at 500 nm to ~150 mas at 1.5 microns, so the native resolution is worse as well. However, undersampling of images due to the detectors' oversized pixels is what dominates the fine details of its effective resolution. The true resolution is actually hard to estimate offhand for images like this. Each observation occurs with sub-pixel offsets with respect to the others, so if you subsample and stack them, you can recover much of the resolution that was lost due to undersampling. With many orbits' worth of images contributing to the UDF, they might have gotten back all of the lost resolution.)
United States

+ - Highway 35W Collapses into Mississippi->

Submitted by
dcapel
dcapel writes "In what has been called the worst engineering disaster in decades, a bridge of highway 35W, in Minneapolis, Minnesota, has collapsed into the Mississippi. The collapse took place during late rush-hour traffic, so an estimated 50 cars were on the bridge at the time. There is no evidence for terrorist involvement, but an engineering or safety flaw of immense proportions must have been involved. As someone who was working only blocks away at the time, this happened entirely too close to home."
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The Media

+ - Will it Blend iPhone unlisted from E-bay

Submitted by ApolloX
ApolloX (1017440) writes "Many of you have caught the clip last week of Tom from Will It Blend? blending an Apple iPhone. After blending the iPhone he put the remains on eBay and with the sale included a new blender and signed DVD of clips. Well, after bidding up to $1150, it was apparently removed from E-bay. No word yet on why although the link on his site to the E-bay item is still up."

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