Rocket Report: India’s Vikram-1 nears debut flight; AST to become rocket company?

How many launches to build a data center megaconstellation? In a new feature, Ars looks into the technical challenges of building orbital data centers and assesses what it might take to build SpaceX’s proposed 1 million satellite megaconstellation. The key to all of this is not radiation or the need to cool data centers in space. The single-most important factor is cheap access to space. For the purpose of the analysis, Ars modeled three scenarios: high-performing Starship and low-satellite mass; medium-performing Starship and satellite mass; and low-performing Starship and high-mass satellites.

The numbers are pretty daunting … The optimistic scenario would require 17,500 Starship launches to deploy 1 million satellites. The most pessimistic scenario would require 77,000 total launches. Over a period of five years, by the way, for the pessimistic scenario that would be 42 Starship launches a day. As for total costs, including launches, satellites, and ground systems, under the most optimistic scenario the constellation could be deployed for $1.45 trillion. Pessimistically? Hold your breath: It’s $9.8 trillion.

NASA mission moves to Falcon Heavy. NASA’s SunRISE (Sun Radio Interferometer Space Experiment) mission will launch on a SpaceX Falcon Heavy rocket from the agency’s Kennedy Space Center in Florida, the space agency said this week. As part of the announcement, NASA did not announce a launch date for the heliophysics mission, which had originally been scheduled to launch on United Launch Alliance’s Vulcan rocket.

Six new eyes on the Sun … The mission is flying as a rideshare sponsored by the United States Space Force’s Space Systems Command. SunRISE comprises six toaster-oven-size small satellites, or SmallSats, that will operate as one giant radio dish slightly above geosynchronous orbit (about 22,000 miles, or 35,000 kilometers, in altitude) to track the rumbles of radio bursts coming from within the Sun’s atmosphere, or corona. (submitted by Tfargo04)