SLS mobile launcher
The mobile launcher, originally built for the Constellation program, undergoing upgrades for the first SLS launch. NASA is considering whether to modify it again for later SLS missions or build a new one.

Building a new mobile launch platform for later Space Launch System missions could cost NASA $300 million but allow for more frequent launches, agency officials said.

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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...