One of the main reasons such a trip is now feasible is that satellites are getting so small, he says. You can collect the same type of data and imagery you got a generation ago with instruments a fraction of the size. SatRevolution’s spacecraft will weigh no more than 110 pounds (50 kilograms), but it will be tasked with imaging Mars and its moon Phobos, studying the Martian atmosphere, and possibly surveying the land for signs of underground water.

Will Pomerantz, the vice president of special projects at Virgin Orbit, says many of the company’s customers, encouraged by NASA’s Artemis moon program, recently asked whether LauncherOne could be used to send small satellites to the moon. The company started to consider whether it could add an extra booster to the two-stage rocket to achieve the extra push needed to exit Earth’s orbit and send small payloads into deep space.

“We realized we actually do have something quite interesting to offer, and that there’s this other nice customer class for us to serve,” he says. Pomerantz won’t divulge specifics of how the third booster will be made, but options include solid rocket motors and liquid propulsion systems. Lightsey says an added electric propulsion system might also do the trick (although the weaker thrust means a longer journey to Mars, potentially exposing the payload’s electronics to harmful amounts of radiation).

“There’s no perfect solution, but there are different ways to solve the problem,” says Lightsey. “It’s possible.”

Even though the company still needs to prove it can make it to orbit at all, it’s already considering plans for missions to destinations like Venus, the moon, and nearby asteroids. Pomerantz is especially excited by what this could mean for opening up deep space to communities like Poland “that have long been interested in space, but have never been included in space.”

That doesn’t mean the industry will make a mass pivot to air launch systems. Lightsey says even the biggest airplanes with the biggest lift capacities currently offer little chance to move beyond small payloads like cubesats. There is perhaps, he says, some hope of using future air launches for tiny resupply missions, or to deliver small packages to crewed outposts and space stations.

“Through the growth in the commercial space industry, we’re seeing more and more options for how to get payloads into space and go to these challenging locations,” he says. “That’s really healthy for the industry. It’s all part of making spaceflight more affordable.”