Elon Musk is betting that Wall Street's estimate of the future space economy is far too conservative. Goldman Sachs recently projected the global space economy will reach $1.8 trillion by 2035, but Musk responded on social media that "it will be much bigger," pointing to breakthroughs in reusable rockets, satellite networks, and orbital computing as evidence the investment bank's forecast misses the mark.

The disagreement matters because it reveals how rapidly the space industry is transforming. Goldman Sachs' report, titled "Second Space Age," frames space as "a new pillar of the industrial economy" driven by lower launch costs, private capital, and commercial infrastructure replacing government-dominated operations. The bank notes that launch costs have plummeted from roughly $55,000 per kilogram during the Space Shuttle era to around $3,000 today, largely because of rocket reusability.

SpaceX's own financial performance suggests Musk's skepticism may be justified. The company reported second-quarter revenue of $7.8 billion, nearly double the previous period, while Starlink revenue surged 66% and subscriber numbers doubled to 12 million. SpaceX also expects to launch at least 1,000 next-generation Starlink V3 satellites within a year.

What Could Make the Space Economy Bigger Than Goldman Sachs Predicts?

Musk's optimism rests on several emerging markets that Goldman Sachs' forecast may not fully account for. The most ambitious is orbital artificial intelligence infrastructure. SpaceX has sought regulatory approval for up to one million solar-powered data-center satellites and plans to begin orbital AI computing demonstrations by late 2027. Musk has argued that much of the required technology already exists within Starlink's infrastructure.

Beyond AI, Musk has tied Starship, SpaceX's fully reusable super-heavy-lift rocket, to lunar logistics, Mars settlement, and even point-to-point transportation on Earth. SpaceX is considering additional spaceports as it targets thousands of Starship flights annually. The company's first public quarterly report showed a $47.5 billion backlog and 78 launches year-to-date, with Starlink operating across 167 countries.

Goldman Sachs' forecast does span multiple categories, but Musk's view is that those categories may represent only the opening phase of a much larger opportunity. The bank identifies opportunities in communications, defense, Earth observation, launch services, and orbital infrastructure. If orbital AI, mass satellite connectivity, and reusable interplanetary transport become commercial realities, the addressable market could extend well beyond the $1.8 trillion benchmark.

How SpaceX Is Positioning Itself to Capture This Opportunity

• Starlink Expansion: SpaceX is rapidly scaling its satellite internet constellation, with subscriber numbers doubling to 12 million and plans to launch 1,000 next-generation V3 satellites within a year, expanding global connectivity and creating a foundation for orbital services.
• Orbital AI Infrastructure: The company is pursuing approval for up to one million solar-powered data-center satellites and targeting orbital AI computing demonstrations by late 2027, potentially creating an entirely new market segment for cloud computing in space.
• Starship Reusability: SpaceX is developing rapid, full reusability of Starship to lower launch costs and support much higher flight rates, which could unlock new applications in lunar logistics, Mars settlement, and Earth-based point-to-point transportation.

The company's financial trajectory underscores the momentum behind these ambitions. SpaceX's first public quarterly report revealed $7.81 billion in revenue and a $47.5 billion backlog, demonstrating strong commercial demand. Goldman Sachs noted that more than $55 billion flowed into the broader space ecosystem in 2025, reflecting investor confidence in the sector's growth potential.

Why the Heat Shield Matters for SpaceX's Long-Term Vision

Realizing Musk's vision of a much larger space economy depends heavily on solving one critical engineering challenge: Starship's heat shield. The spacecraft's heat shield, made of approximately 18,000 ceramic tiles, is essential to SpaceX's goal of making the vehicle fully and rapidly reusable. During SpaceX's first quarterly earnings call, Musk stated he considered the heat shield problem "solved," though other industry experts remain skeptical.

The importance of this component became apparent when SpaceX recovered Starship after its July 24 test flight. The spacecraft splashed down intact in the Indian Ocean after flying halfway around the world from SpaceX's launch base in South Texas, an outcome that surprised engineers who expected the vehicle to disintegrate upon impact. After nearly a month at sea, SpaceX towed the 52-meter-long spacecraft to Christmas Island, an Australian territory, for inspection.

The recovery effort revealed that the heat shield was in better condition after this flight than following previous reentries, suggesting incremental progress. However, the tiles must withstand far more demanding conditions if SpaceX is to achieve its goal of turning around a fleet of Starships multiple times per day. Getting the recovered heat shield back and subjecting the tiles to laboratory tests or future flights could help answer whether they can handle the high flight rates SpaceX foresees for building and maintaining bases on the Moon and Mars or large constellations of orbital data centers.

The broader implication is clear: if SpaceX can solve the heat shield problem and achieve rapid reusability, the economics of space access transform fundamentally. Lower launch costs and higher flight rates would unlock applications that currently seem prohibitively expensive, potentially validating Musk's belief that Goldman Sachs' $1.8 trillion forecast is merely a floor, not a ceiling.