Deep Space Industries' backers say that their newly revealed plan to seek out and dig into near-Earth asteroids has already attracted interest and investors — but they also admit they're looking for much more.

"We have some investors on board," the company's CEO, David Gump, told journalists during Tuesday's briefing at California's Santa Monica Museum of Flying, "and one reason for having this press conference is to become findable by additional investors."

The event gave Gump and his partners a chance to lay out their vision for new in-space industries, ranging from asteroid reconnaissance to solar-power satellites and space settlement. However, they provided few details about their financial backers or their customers.

One potential customer is NASA, which might be interested in purchasing the data gathered by Deep Space's asteroid-hunting probes. NASA struck just such a data-purchase plan with some of the teams competing for the Google Lunar X Prize, which is aimed at encouraging the development of private-sector moon rovers.

Gump said he and other executives met with space agency officials to discuss Deep Space's plans to launch fleets of low-cost asteroid probes as early as 2015. "We found a great hunger for the idea that we can get space missions done for a much lower cost," he said. Such data could help the space agency fine-tune its plans to send astronauts to an asteroid in the mid-2020s.

Deep Space's development plan calls for launching three of its Cubesat-based reconnaissance satellites, known as FireFlies, as piggyback payloads on a yet-to-be-determined launch vehicle in 2015. Those 25-kilogram (55-pound) spacecraft would go on six-month, one-way missions to scout out near-Earth asteroids. In 2016, a 32-kilogram (70-pound) DragonFly probe would take on the first three- to four-year mission to bring up to 45 kilograms (100 pounds) of asteroid samples back to Earth.

Bryan Versteeg / Deep Space Industries

Artwork shows two FireFly spacecraft studying a near-Earth asteroid. Deep Space Industries cautioned that the artwork does not necessarily reflect the actual spacecraft design.

Bryan Versteeg / Deep Space Industries

An artist's conception shows a version of Deep Space Industries' DragonFly spacecraft grabbing a rock sample from an asteroid for return to Earth.

Bryan Versteeg / Deep Space Industries

Concept art shows a version of Deep Space Industries' Harvestor extracting materials from an asteroid.

Gump said commercial in-space processing could begin as early as 2020, facilitated by Harvestor spacecraft capable of bringing hundreds of tons of material back to Earth orbit. An industrial type of 3-D printer could turn the ground-up metal from an iron-nickel asteroid into tools and spacecraft components. More precious metals such as gold or platinum could be shipped down to Earth.

Another potentially profitable line of business would be to turn water and other material from asteroids into fuel for filling up the propellant tanks of existing communication satellites, thus extending their lives. Gump said Deep Space was discussing the concept with a major satellite operator that was "intrigued" by the idea.

John Mankins, Deep Space's chief technical officer, said the spacecraft concepts relied on existing technology. "You don't see any magic," he said. "You don't see any space elevators, you don't see any [artificial] gravity, you don't see any warp drive."

Gump said the price tag for the first three-probe mission to a near-Earth asteroid would be $20 million. If Deep Space finds a customer willing to pay that price, that would bring in a "good profit," said the company's board chairman, veteran space activist Rick Tumlinson.

In addition to the selling the data and the more substantial products generated by asteroid missions, Deep Space could bring in money through corporate sponsorships and branding, as well as extras such as "VIP access" to a launch site or mission control center, Gump said.

"The journey of a million miles begins with a business plan that closes in the next few years," said Gump, who previously has been involved in space ventures such as LunaCorp (which proposed sending rovers to the moon), Transformational Space Corp. (which was an early competitor in NASA's space commercialization effort) and Astrobotic (which is one of the teams competing for the Google Lunar X Prize).

Will Deep Space's business plan take off? That was the big question hanging in the air after Tuesday's briefing. Planetary Resources, another commercial venture that was unveiled less than a year ago, has a business plan that's comparable to that proposed by Deep Space Industries. It also has an impressive list of billionaire investors, including Google's Eric Schmidt and Larry Page. If Planetary Resources holds to its previously announced schedule, its first prototype space telescope could be launched as early as next year.

Planetary Resources' president, Chris Lewicki, said this week that the company was "extraordinarily busy" with the task of building prototypes at its Seattle-area manufacturing facility. In contrast, Tumlinson said Deep Space Industries had not yet determined where its spacecraft would be built. "Literally, we are looking for somebody who wants to make a good offer to have this kind of budding industry there," he said.

Both companies are betting that the resources from asteroids will be valuable enough to go after in the next decade. It's entirely possible that both companies will lose that bet, particularly if space travel doesn't take off the way they expect. But if the bets pay off, both companies could be winners.

"There are 2 to 3 million near-Earth asteroids," Gump said. "There's room for everyone to prosper, I think."

Update for 2:10 p.m. ET Jan. 23: Planetary Resources emailed this comment from Lewicki, welcoming the newest member of the asteroid-hunting club: "Deep Space Industries also sees the importance of accessing and utilizing the resources of space.  Asteroid mining will open a trillion-dollar industry and provide a near-infinite supply of space-based resources to support our growth both on this planet and off." 

More about asteroid ventures:

• Reality check for asteroid miners
• Taking the wraps off Deep Space Industries
• Private space telescope could boost asteroid mining
• NASA to explore potentially deadly space rock

Alan Boyle is NBCNews.com's science editor. Connect with the Cosmic Log community by "liking" the log's Facebook page, following @b0yle on Twitter and adding the Cosmic Log page to your Google+ presence. To keep up with Cosmic Log as well as NBCNews.com's other stories about science and space, sign up for the Tech & Science newsletter, delivered to your email in-box every weekday. You can also check out "The Case for Pluto," my book about the controversial dwarf planet and the search for new worlds.

Bryan Versteeg / Deep Space Industries

An artist's conception shows a settlement taking shape as part of an asteroid mining operation.

A new venture dubbed Deep Space Industries is jumping into the marketplace for asteroid mining — joining a billionaire-backed company called Planetary Resources in what they hope will eventually turn into a trillion-dollar business.

In a press advisory, Deep Space Industries says it will create "the world’s first fleet of commercial asteroid-prospecting spacecraft." The venture also promises to develop a "breakthrough process for manufacturing in space."

"Deep Space is pursuing an aggressive schedule and plans on prospecting, harvesting and processing asteroids for use in space and to benefit Earth," the company said in a press advisory. Further details came out in a news release issued early Tuesday, and a news briefing is scheduled for 10 a.m. PT (1 p.m. ET) Tuesday at the Santa Monica Museum of Flying in California. The briefing will be webcast via Spacevidcast and YouTube.

Deep Space's CEO is David Gump, who has been involved in other space-themed companies including LunaCorp, which aimed to send rovers to the moon and also helped arrange one of the first TV commercials in orbit; Transformational Space, one of the early players in NASA's commercialization effort; and Astrobotic, one of the teams going after the Google Lunar X Prize.

The company's chairman is Rick Tumlinson, who was involved in founding the Space Frontier Foundation as well as private space ventures such as Space Diving and Orbital Outfitters. Geoff Notkin, host of the Science Channel's "Meteorite Men" TV series, announced that he'd join the venture as well. 

Financial questions
One of the key questions relates to the venture's financial backing: Theoretically, mining the right kind of asteroid could produce precious metals worth sending back to Earth, such as platinum, gold and rare-earth minerals. Some asteroids also contain water ice that can be converted into fuel and supplies for space travel and settlement. Under the right conditions, such resources could be worth trillions of dollars a year. But it would cost billions of dollars to identify and exploit those resources.

To cover such costs, Planetary Resources recruited a big-name investment group that includes Google's Larry Page and Eric Schmidt, software executive and spaceflier Charles Simonyi, Texan billionaire Ross Perot Jr. and Silicon Valley venture capitalist Ram Shriram. Planetary Resources also has a business plan that involves selling its Arkyd space telescopes as the first step toward profitability.

When Planetary Resources had its coming-out party last year, that company's executives said they planned to launch their first hardware in the 2013-2014 time frame. In a technical update released on Monday, the company's president, Chris Lewicki, didn't provide details about the launch schedule. But he did say there were "a number of exciting upcoming events," and indicated that the venture was currently concentrating on the development of low-cost prototype telescopes.

"With each new prototype build, we’re learning a lot about how to strip cost out of the assembly, integration and test process, and that will be incredibly valuable when we start mass production of the units destined for space," Lewicki said.

It's not yet clear whether Deep Space Industries will end up being a competitor for Planetary Resources — or a customer. But as with most outer-space ventures, the venture's financial underpinnings will be as much a key to success as its technological vision.

Update for 1:30 a.m. ET Jan. 22: Deep Space Industries provided more details in this voluminous news release:

"Deep Space Industries announced today that it will send a fleet of asteroid-prospecting spacecraft out into the solar system to hunt for resources to accelerate space development to benefit Earth. These 'FireFly' spacecraft utilize low-cost cubesat components and get discounted delivery to space by ride-sharing on the launch of larger communications satellites.

"'This is the first commercial campaign to explore the small asteroids that pass by Earth,' said Deep Space Chairman Rick Tumlinson (who signed up the world's first space tourist, led the team that took over the Mir space station, was a Founding Trustee of the X Prize, and Founded Orbital Outfitters, the world's first commercial space suit company.) 'Using low-cost technologies, and combining the legacy of our space program with the innovation of today's young high-tech geniuses, we will do things that would have been impossible just a few years ago.'

"FireFlies mass about 55 pounds (25 kilograms) and will first be launched in 2015 on journeys of two to six months. Deep Space will be building a small fleet of the spacecraft using innovative miniature technologies, and working with NASA and other companies and groups to identify targets of opportunity.

"'My smartphone has more computing power than they had on the Apollo moon missions,' said Tumlinson. 'We can make amazing machines smaller, cheaper, and faster than ever before. Imagine a production line of FireFlies, cocked and loaded and ready to fly out to examine any object that gets near the Earth.'

"Starting in 2016, Deep Space will begin launching 70-pound DragonFlies for round-trip visits that bring back samples. The DragonFly expeditions will take two to four years, depending on the target, and will return 60 to 150 pounds. Deep Space believes that combining science, prospecting and sponsorship will be a win/win for everyone, both lowering costs for exploration and enabling the public to join the adventure.

"'The public will participate in FireFly and DragonFly missions via live feeds from Mission Control, online courses in asteroid mining sponsored by corporate marketers, and other innovative ways to open the doors wide,' said CEO David Gump. His earlier ventures include producing the first TV commercial shot on the International Space Station for RadioShack, co-founding Transformational Space Corp. (t/Space) and Astrobotic Technology Inc. 'The Google Lunar X Prize, Unilever, and Red Bull each are spending tens of millions of dollars on space sponsorships, so the opportunity to sponsor a FireFly expedition into deep space will be enticing.'

"Bringing back asteroid materials is only a step on the way to much bigger things for DSI. The company has a patent-pending technology called the MicroGravity Foundry to transform raw asteroid material into complex metal parts. The MicroGravity Foundry is a 3-D printer that uses lasers to draw patterns in a nickel-charged gas medium, causing the nickel to be deposited in precise patterns.

"'The MicroGravity Foundry is the first 3-D printer that creates high-density high-strength metal components even in zero gravity,' said Stephen Covey, a co-founder of DSI and inventor of the process. 'Other metal 3-D printers sinter powdered metal, which requires a gravity field and leaves a porous structure, or they use low-melting point metals with less strength.'

"Senior leaders at NASA have been briefed on DSI's technologies, which would make eventual crewed Mars expeditions less expensive through the use of asteroid-derived propellant.  Missions would require fewer launches if the fuel to reach Mars were added in space from the volatiles in asteroids.  Mars missions also would be safer with a MicroGravity Foundry on board to print replacements for broken parts, or to create brand new parts invented after the expedition was on its way to the Red Planet.

"'Using resources harvested in space is the only way to afford permanent space development,' said Gump. 'More than 900 new asteroids that pass near Earth are discovered every year. They can be like the Iron Range of Minnesota was for the Detroit car industry last century — a key resource located near where it was needed. In this case, metals and fuel from asteroids can expand the in-space industries of this century. That is our strategy.'

"For example, a large market for DSI is producing fuel for communications satellites. Low-cost asteroid propellant delivered in orbit to commsats will extend their working lifetimes, with each extra month worth $5 million to $8 million per satellite. DSI has executed a non-disclosure agreement with an aerospace company to discuss collaboration on this opportunity. In a decade, Deep Space will be harvesting asteroids for metals and other building materials, to construct large communications platforms to replace communications satellites, and later solar power stations to beam carbon-free energy to consumers on Earth. As DSI refines asteroids for in-space markets, it also will harvest platinum group metals for terrestrial uses, such as pollution control devices.

"'Mining asteroids for rare metals alone isn't economical, but makes sense if you already are processing them for volatiles and bulk metals for in-space uses,' said Mark Sonter, a member of the DSI board of directors. Mr. Sonter combines experience in planning, permitting, and management of large and complex terrestrial mining projects with funded research into the development of asteroid resources. 'Turning asteroids into propellant and building materials damages no ecospheres since they are lifeless rocks left over from the formation of the solar system. Several hundred thousand that cross near Earth are available.'

"Asteroids that fall to Earth are meteorites, and the Deep Space team includes Geoffrey Notkin, star of the international hit television series 'Meteorite Men' about hunting for them. Notkin has unparalleled expertise in the diversity and market value of these elusive rocks, which are transformed by intense heat during their plunge to the surface. By contrast, the initial asteroid samples to be brought back by Deep Space will have their original in-space composition and structure preserved, creating exceedingly rare specimens for sale to the research and collectors markets.

"Deep Space is looking for customers and sponsors who want to be a part of creating this new space economy. The company believes that taking the long view, while creating value, opportunities and products in the near term will allow it to become one of the economic engines that opens space to humanity. By getting under way and taking calculated risks, while developing basic industrial technologies, DSI will be well positioned over time to supply the basic needs of life in space. Taking the idea of socially minded companies to a new level, DSI is literally reaching for the stars.

"'We will only be visitors in space until we learn how to live off the land there,' concluded Tumlinson. 'This is the Deep Space mission — to find, harvest and process the resources of space to help save our civilization and support the expansion of humanity beyond the Earth — and doing so in a step-by-step manner that leverages off our space legacy to create an amazing and hopeful future for humanity. We are squarely focused on giving new generations the opportunity to change not only this world, but all the worlds of tomorrow. Sounds like fun, doesn't it?"

More about asteroid ventures:

• Asteroid hunters want you ... to suggest projects
• Asteroid activists launch fund-raising campaign
• NASA studies plan to lasso an asteroid

Stay tuned for updates after Tuesday's news briefing.

Alan Boyle is NBCNews.com's science editor. Connect with the Cosmic Log community by "liking" the log's Facebook page, following @b0yle on Twitter and adding the Cosmic Log page to your Google+ presence. To keep up with Cosmic Log as well as NBCNews.com's other stories about science and space, sign up for the Tech & Science newsletter, delivered to your email in-box every weekday. You can also check out "The Case for Pluto," my book about the controversial dwarf planet and the search for new worlds.