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SpaceX CEO Elon Musk proposes Starship, Starlink tech for Solar System tour

Starship ignites its Raptor engines during a close approach to Titan. (NASA/SpaceX/Teslarati)

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SpaceX CEO Elon Musk has proposed an unusual approach to conducting a robotic survey of the Solar System’s major outer planets, asteroids, and comets, requiring a stripped-down Starship with a minimalist payload of Starlink satellites modified for interplanetary cruises and high-resolution cameras.

To enable this arrangement, it sounds like an expendable variant of Starship would have to be designed and built, cutting as much extraneous mass as possible to put as much energy as physically possible into its payloads. Outer planets – those lying beyond the Solar System’s main asteroid belt – are a minimum of 400 million miles (~650 million km) from Earth and stretch out to bodies like 2014 MU69 (below) at 4+ billion miles (6.8+ billion km) beyond Earth’s orbit. To travel those truly absurd distances, the time-to-destination can often be measured in decades, a timeframe that is physically impossible to shrink without hugely powerful rockets like BFR. Even then, SpaceX would face major hurdles to pull off Musk’s impromptu mission design.

New Horizons, the tiny but amazing spacecraft responsible for the first-ever close-up photos of Pluto and (more recently) the bizarre MU69 comet/asteroid, is perhaps the best categorical example of what Musk is proposing. Weighing less than 480 kg (1060 lb) and powered by a radioisotope generator (RTG), the spacecraft was launched in January 2006 and – after a single gravity assist around Jupiter – flew by Pluto a bit less than ten years later in July 2015, traveling a blistering ~13.8 km/s (8.6 mi/s).

After traveling several billion miles over nearly a decade, New Horizons completed its main mission, returning spectacular views of the unexpectedly exotic Pluto. (NASA/JPL)

Coincidentally, at least the first prototypes of SpaceX’s Starlink satellite constellation weighed around 400 kg (880 lb) during their March 2018 launch, just shy of New Horizons’ own dry mass. Major differences abound, however. Most notably, Starlink satellites will be powered by solar arrays optimized for energy generation at Earth’s distance from the sun, compared to New Horizons’ RTG reactor. At distances beyond Saturn, reliance on solar power would be an extraordinary challenge for any spacecraft hoping to do more than simply survive. For example, due to certain unforgiving laws of physics, New Horizons would receive – quite literally – 0.06% the solar energy per unit of area at Pluto.

To produce the scant ~300 Watts New Horizon receives from its nuclear power source, a single Starlink satellite would need a minimum of 1400 m^2 (~15,000 ft^2) of high-efficiency solar panels to survive and power a minimal suite of instruments and communications hardware. Assuming an extraordinary 170 g/m^2 solar array as proposed by Alta Devices, a Starlink satellite would need solar cells weighing no less than 250 kg (550 lb) total to operate at Pluto, a mass that absolutely does not factor in the complex mechanisms necessary to deploy a third of an acre of solar panels from an area of just a few cubic meters.

Frankly put, solar-powered exploration beyond the orbit of Jupiter and perhaps Saturn becomes almost inconceivably difficult. Further, the above numbers don’t even take into account each Starlink spacecraft’s electric thrusters, which would need several times more solar panels or massive batteries (themselves needing heaters) to operate at an optimal power level for long, uninterrupted periods of time, a necessity for electric propulsion. Several billion miles closer to the sun, in the main asteroid belt or around the gas giants Jupiter and Saturn, solar power is still extremely challenging but not impossible. NASA’s Juno spacecraft, the first solar-powered vehicle to visit the outer planets, uses solar arrays with an area of 72 m^2 (800 ft^2) to produce less than 500 Watts of power around Jupiter, compared to the ~14 kW they could produce around Earth.

Juno’s solar arrays are an impressive ~28% efficient but still weigh 340 kg (750 lb) and produce less than 500 Watts of power around Jupiter. (NASA)

At the end of the day, SpaceX’s Starlink satellites and Starship-based boost stage would need to undergo radical (and thus expensive) redesigns to accomplish such an ambitious ‘tour’ of the Outer Solar System, quite possibly also requiring the development and integration of wholly new technologies and exploration strategies to get off the ground. While the challenges are immense, the fact that Mr. Musk is already expressing interest in supporting such an exploratory, science-focused mission inspires confidence in the many future benefits that could soon be derived from Starlink and Starship, if successfully developed. Assuming missions that remain within the Inner Solar System, an exploration architecture as described by Musk is already readily doable and wouldn’t need the major modifications and leaps necessary for Outer Solar System ventures. Possible destinations where it could be practical include the Moon, Mars, Venus, the main asteroid belt (i.e. Ceres, Vesta, etc.), and many others.

If SpaceX can find a way to get both Starlink and Starship off the ground and into operational configurations, the future of space exploration – both human and robotic – could be extraordinarily bright.

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Eric Ralph is Teslarati's senior spaceflight reporter and has been covering the industry in some capacity for almost half a decade, largely spurred in 2016 by a trip to Mexico to watch Elon Musk reveal SpaceX's plans for Mars in person. Aside from spreading interest and excitement about spaceflight far and wide, his primary goal is to cover humanity's ongoing efforts to expand beyond Earth to the Moon, Mars, and elsewhere.

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FCC chair criticizes Amazon over opposition to SpaceX satellite plan

Carr made the remarks in a post on social media platform X.

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Credit: @SecWar/X

U.S. Federal Communications Commission (FCC) Chairman Brendan Carr criticized Amazon after the company opposed SpaceX’s proposal to launch a large satellite constellation that could function as an orbital data center network.

Carr made the remarks in a post on social media platform X.

Amazon recently urged the FCC to reject SpaceX’s application to deploy a constellation of up to 1 million low Earth orbit satellites that could serve as artificial intelligence data centers in space.

The company described the proposal as a “lofty ambition rather than a real plan,” arguing that SpaceX had not provided sufficient details about how the system would operate.

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Carr responded by pointing to Amazon’s own satellite deployment progress.

“Amazon should focus on the fact that it will fall roughly 1,000 satellites short of meeting its upcoming deployment milestone, rather than spending their time and resources filing petitions against companies that are putting thousands of satellites in orbit,” Carr wrote on X.

Amazon has declined to comment on the statement.

Amazon has been working to deploy its Project Kuiper satellite network, which is intended to compete with SpaceX’s Starlink service. The company has invested more than $10 billion in the program and has launched more than 200 satellites since April of last year.

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Amazon has also asked the FCC for a 24-month extension, until July 2028, to meet a requirement to deploy roughly 1,600 satellites by July 2026, as noted in a CNBC report.

SpaceX’s Starlink network currently has nearly 10,000 satellites in orbit and serves roughly 10 million customers. The FCC has also authorized SpaceX to deploy 7,500 additional satellites as the company continues expanding its global satellite internet network.

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NASA watchdog says Starship development delays could affect Artemis timeline

The report noted that several technical milestones still need to be completed before Starship can serve as a crewed lunar lander.

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Credit: SpaceX

A NASA watchdog report stated that continued development work on SpaceX’s Starship could affect the timeline for the agency’s planned Artemis moon missions. The report noted that several technical milestones still need to be completed before the spacecraft can serve as a crewed lunar lander.

The findings were detailed in a report from NASA’s Office of Inspector General, as noted in a report from Reuters.

NASA selected SpaceX’s Starship in 2021 to serve as the Human Landing System (HLS) for its Artemis lunar program. The vehicle is intended to transport astronauts from lunar orbit to the surface of the Moon and back as part of future Artemis missions.

According to the watchdog report, Starship’s development has experienced roughly two years of schedule delays compared to earlier expectations. Still, NASA is targeting 2028 for the first crewed lunar landing using the Starship lander.

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One of the most significant technical milestones for Starship’s lunar missions is in-space refueling.

To support a crewed lunar landing, multiple Starship launches will be required to deliver propellant to orbit. Tanker versions of Starship will transfer fuel to a storage depot spacecraft, which will then refuel the lunar lander.

The report noted that this approach could require more than 10 Starship launches to fully refuel the spacecraft needed for a single lunar landing mission.

NASA officials indicated that demonstrating cryogenic propellant transfer in orbit remains one of the most important technical steps before Starship can be certified for lunar missions.

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SpaceX has conducted 11 Starship test flights since 2023 as the company continues developing the fully reusable launch system. A 12th test flight, this time featuring Starship V3, is expected to be held in early April. 

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SpaceX weighs Nasdaq listing as company explores early index entry: report

The company is reportedly seeking early inclusion in the Nasdaq-100 index.

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Credit: SpaceX/X

Elon Musk’s SpaceX is reportedly leaning toward listing its shares on the Nasdaq for a potential initial public offering (IPO) that could become the largest in history. 

As per a recent report, the company is reportedly seeking early inclusion in the Nasdaq-100 index. The update was reported by Reuters, citing people familiar with the matter.

According to the publication, SpaceX is considering Nasdaq as the venue for its eventual IPO, though the New York Stock Exchange is also competing for the listing. Neither exchange has reportedly been informed of a final decision.

Reuters has previously reported that SpaceX could pursue an IPO as early as June, though the company’s plans could still change.

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One of the publication’s sources also suggested that SpaceX is targeting a valuation of about $1.75 trillion for its IPO. At that level, the company would rank among the largest publicly traded firms in the United States by market capitalization.

Nasdaq has proposed a rule change that could accelerate the inclusion of newly listed megacap companies into the Nasdaq-100 index.

Under the proposed “Fast Entry” rule, a newly listed company could qualify for the index in less than a month if its market capitalization ranks among the top 40 companies already included in the Nasdaq-100.

If SpaceX is successful in achieving its target valuation of $1.75 trillion, it would become the sixth-largest company by market value in the United States, at least based on recent share prices. 

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Newly listed companies typically have to wait up to a year before becoming eligible for major indexes such as the Nasdaq-100 or S&P 500.

Inclusion in a major index can significantly broaden a company’s shareholder base because many institutional investors purchase shares through index-tracking funds.

According to Reuters, Nasdaq’s proposed fast-track rule is partly intended to attract highly valued private companies such as SpaceX, OpenAI, and Anthropic to list on the exchange.

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