Starcloud, the company building data centers in space, announced it has raised a $170 million Series A, at a $1.1 billion valuation. Achieving unicorn status just 17 months after its Y Combinator demo day, Starcloud is now the fastest unicorn in Y Combinator history. The round is also more than double the size of the next largest YC Series A, and brings the company's total capital raised to $200 million. The round was split into two tranches, with an initial round led by Benchmark with participation from EQT, and an extension round co-led by both investors. The heavily oversubscribed round also saw participation from major global funds and strategic partners, including the world's largest infrastructure fund, Macquarie Capital, NFX, Nebular, Y Combinator, Adjacent, 776 Ventures, Fuse Ventures, Manhattan West, and Monolith Power Systems. Prominent angel investors joining the round include Gen. Stephen Wilson, former Boeing CEO Dennis Muilenburg, and former Starbucks CEO and Goldman Sachs board member Kevin Johnson.