9 Matching Annotations
  1. Dec 2018
  2. Apr 2017
    1. An asteroid more than a quarter mile (400 meters) wide will pass close to Earth on Wednesday, zooming by at a distance of just over a million miles (1.8 million km), but with no chance of impact, according to NASA scientists.

      That could have been in the headline!

  3. Jan 2017
  4. Oct 2016
    1. The topic was strong and to the point, and had plenty of background information. However, there were some contradictions in the essay, like when he said every president so far has discussed benefits of NASA and supports it, but then states that Obama cut some of its funding. Obama actually did this to focus on other current issues, but he now fully supports the manned mission to Mars. https://capitalresearch.org/2016/07/nasa/

  5. Jul 2016
    1. Page 137

      Borgman discusses hear the case of NASA which lost the original video recording of the first moon landing in 1969. Backups exist, apparently, but they are lower quality than the originals.

  6. May 2016
    1. lesh, the engineering manager, and Dubusker drew on all of McDonnell's experience with shingled-skin structures around jet afterburners for heat protection.
    2. Simulation tests indicate that manual control of the capsule attitude during retrograde firing will be a difficult task requiring much practice on the part of the pilot. By changing the command function from acceleration to rate, the task complexity will be greatly reduced and the developmental effort on display and controller characteristics can be reduced accordingly
    3. There is a natural reluctance to relinquish the mechanical linkage to the solenoid valves but the redundant fly-by-wire systems offer mechanical simplification with regard to plumbing and valving hydrogen peroxide
  7. Apr 2016
    1. "Using visible wavelengths of light, it is difficult to tell if an asteroid is big and dark, or bright and small, because both combinations reflect the same amount of light," said Carrie Nugent, a NEOWISE scientist at the Infrared Processing and Analysis Center at California Institute of Technology, in Pasadena. "But when you look at an asteroid in the infrared with NEOWISE, the amount of infrared light corresponds with how big the asteroid is, and with some thermal models on a computer, you can figure out how big the asteroids are."