The Chinese Solar Machine Layer by Layer Fire in the Library The Mystery Behind Anesthesia
Apollo astronaut says: forget the moon, let's colonize Mars.
In April, President Obama flew to Kennedy Space Center in Cape Canaveral, FL, to reveal details of his new strategy for NASA and the future of U.S. spaceflight. Sitting next to the president on Air Force One was Buzz Aldrin, who in July 1969 became the second man to walk on the moon. The seating arrangement was appropriate, since both men share a common goal for the nation's space program: reaching Mars by the mid-2030s.
Like Obama, Aldrin opposes the strategy set by President Bush in 2004 to return humans to the lunar surface by 2020. The cornerstone of Bush's plan for NASA was the Constellation program, which included building two new rockets--Ares I to ferry humans into orbit and Ares V to transport heavy cargo--and a manned exploration vehicle called Orion. But the program fell behind schedule and was over budget (see "The Future of Human Spaceflight," January/February 2010). In January, Obama released a new budget proposal that increased NASA's budget by $6 billion over the next five years but terminated the Constellation program.
To read the entire article you must log in:
Most of our content — all daily news, blogs, and videos — is free. Magazine stories are paid. To read this story, you must have a subscription or you must use a reading credit. Registration to Technology Review is free and entitles registrants to three free reading credits.
Manufacturing in the United States is in trouble. That's bad news not just for the country's economy but for the future of innovation.
This document is part of the “How-To Guide for Most Common Measurements” centralized resource portal. This tutorial provides a detailed guide for measurement and device considerations to take temperature measurements using thermocouples. Get an introduction to thermocouples, which are inexpensive sensing devices widely used with PC-based data acquisition systems. Also review some specific thermocouple examples and learn how thermocouples work and ways to integrate them into a data acquisition measurement system.
View full PDF >