THE AMBITIOUS DAWN MISSION, launched in September 2007, is one of NASA’s most remarkable ventures into the solar system. The spacecraft has recently completed a spectacular exploration of Vesta and is now traveling to Ceres; these were among the last uncharted worlds in the inner solar system prior to Dawn. It is the only spacecraft ever to orbit an object in the asteroid belt. Such a mission would be impossible without the use of ion propulsion, a technology that has mostly been in the domain of science fiction, but which was tested extensively on the Deep Space 1 mission, paving the way for Dawn. In this lecture, Dr. Marc Rayman, Dawn’s Chief Engineer and Mission Director at JPL, describes the Dawn mission and its use of ion propulsion as well as its two exotic destinations. He also shares the excitement and profundity of controlling a spacecraft in deep space.
Carbon Comic, which appears in Skeptic magazine, is created by Kyle Sanders: a pilot and founder of Little Rock, Arkansas’ Skeptics in The Pub. He is also a cartoonist who authors Carbon Dating: a skeptical comic strip about science, pseudoscience, and relationships. It can be found at carboncomic.com.
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Who believes them? Why? How can you tell if they’re true?
What is a conspiracy theory, why do people believe in them, and why do they tend to proliferate? Why does belief in one conspiracy correlate to belief in others? What are the triggers of belief, and how does group identity factor into it? How can one tell the difference between a true conspiracy and a false one?
Do you know someone who has had a mind altering experience? If so, you know how compelling they can be. They are one of the foundations of widespread belief in the paranormal. But as skeptics are well aware, accepting them as reality can be dangerous…