SLS on pad Aug. 26
Countdown clocks started on the morning of Aug. 27 for the first attempt to launch the SLS and Orion spacecraft on the Artemis 1 mission Aug. 29.

NASA started the countdown Aug. 27 for its first attempt to launch its Space Launch System rocket and Orion spacecraft for an uncrewed flight around the moon.

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Jeff Foust has more than a decade of experience writing about space policy, entrepreneurial ventures and regulatory affairs. In 2001, he established spacetoday.net to aggregate and summarize the day's space-related news stories. In 2003, he started The...