Archive for the ‘Near Earth Objects’ Category
The National Space Society (NSS) applauds the new NASA budget item that would provide close to $100 million for a mission to rendezvous with a small asteroid and move it into orbit around the Moon where it could later be visited by astronauts.
“An asteroid capture mission is a tremendously important mission, and one that could not be more relevant to the challenges our civilization faces today,” said Mark Hopkins, Chairman of the NSS Executive Committee. “Robotic asteroid capture is the first step to exploiting the vast material resources of the solar system for a hopeful and prosperous future for mankind.”
Notes NSS Executive Vice President Paul Werbos, “Even small asteroids contain tremendous wealth—precious metals, rare strategic metals important for sustainable development, raw materials for in-space construction, and volatiles for life support and propulsion in space.”
This mission is an important precursor to enable private industry to access such resources for the benefit of all mankind and return wealth to our world economy. One medium sized asteroid, 3554 Anum, is estimated to contain $20 trillion of platinum group metals.
Robotic asteroid capture is also a key step toward an effective planetary defense. The mission will mature our ability to capture and deflect a hazardous asteroid—protecting civilization from suffering the same fate as the dinosaurs. The search for suitable targets will find huge numbers of smaller, currently unknown asteroids which pose a very real meteor threat to cities as evidenced by the explosion last month over Chelyabinsk, Russia that injured over 1000 people.
The mission also involves development of cost-effective new technologies of crucial value both to public and private activities in space. Robotic asteroid capture will drive improvements to Solar Electric Propulsion, a critical enabler of cost-effective transportation in Earth-Lunar space and the inner solar system akin to the development of large ocean faring vessels—opening up possibilities for even more ambitious missions in the future.
“The National Space Society has been advocating the capture of asteroid resources for decades (see our Roadmap and Statement of Philosophy), and is most gratified to see this important step toward the NSS Vision of people living and working in thriving communities beyond the Earth, and the use of the vast resources of space for the dramatic betterment of humanity,” said Hopkins.
In an online article about Deep Space Industries, the newly announced asteroid mining company, Fox News quoted NSS Executive Committee Chair Mark Hopkins as follows:
“They have the potential to make an enormous amount of money,” Mark Hopkins, a founding member of the Space Development Steering Committee and the Chair of the Exec. Committee of the National Space Society, told FoxNews.com.
“It’s a risky venture. But if they don’t make it some other company is likely to do it in the future,” Hopkins said. “[Space mining] has the potential of restoring the American dream in the minds of Americans and the rest of the world.”
Hopkins is a former Rand Corporation economist.
Deep Space Industries believes the human race is ready to begin harvesting the resources of space both for their use in space and to increase the wealth and prosperity of the people of planet Earth.
Note: Starts at 2.5 minutes. Moderator is “Meteorite Man” Geoff Notkin.
Deep Space Industries announced January 22 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 lbs. (25 kg) 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-lb 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 lbs. 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 3D 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 3D 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 3D 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 senses 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?”
In an announcement today at the Farnborough International Air Show, Virgin Galactic revealed it is partnering with a privately funded satellite launcher to build a two stage air launched rocket capable of placing 225 kilograms into orbit for around $10 Million dollars.
Skybox Imaging announced it has raised $91 million for a high resolution imaging system, which will use LauncherOne.
GeoOptics Inc. is developing a constellation of remote sensing satellites to be orbited by Virgin Galactic.
Spaceflight Inc. and Planetary Resources also plan to use LauncherOne.
Also, Surrey Satellite Technology and Sierra Nevada Space Systems, announced that they would create optimized satellite designs to match LauncherOne’s performance specifications.
PASADENA, Calif. – Astronomers studying observations taken by NASA’s Wide-field Infrared Survey Explorer (WISE) mission have discovered the first known “Trojan” asteroid orbiting the sun along with Earth.
Trojans are asteroids that share an orbit with a planet near stable points in front of or behind the planet. Because they constantly lead or follow in the same orbit as the planet, they never can collide with it. In our solar system, Trojans also share orbits with Neptune, Mars and Jupiter. Two of Saturn’s moons share orbits with Trojans.
Scientists had predicted Earth should have Trojans, but they have been difficult to find because they are relatively small and appear near the sun from Earth’s point of view.
“These asteroids dwell mostly in the daylight, making them very hard to see,” said Martin Connors of Athabasca University in Canada, lead author of a new paper on the discovery in the July 28 issue of the journal Nature. “But we finally found one, because the object has an unusual orbit that takes it farther away from the sun than what is typical for Trojans. WISE was a game-changer, giving us a point of view difficult to have at Earth’s surface.”
The WISE telescope scanned the entire sky in infrared light from January 2010 to February 2011. Connors and his team began their search for an Earth Trojan using data from NEOWISE, an addition to the WISE mission that focused in part on near-Earth objects, or NEOs, such as asteroids and comets. NEOs are bodies that pass within 28 million miles (45 million kilometers) of Earth’s path around the sun. The NEOWISE project observed more than 155,000 asteroids in the main belt between Mars and Jupiter, and more than 500 NEOs, discovering 132 that were previously unknown.
The team’s hunt resulted in two Trojan candidates. One called 2010 TK7 was confirmed as an Earth Trojan after follow-up observations with the Canada-France-Hawaii Telescope on Mauna Kea in Hawaii.
The asteroid is roughly 1,000 feet (300 meters) in diameter. It has an unusual orbit that traces a complex motion near a stable point in the plane of Earth’s orbit, although the asteroid also moves above and below the plane. The object is about 50 million miles (80 million kilometers) from Earth. The asteroid’s orbit is well-defined and for at least the next 100 years, it will not come closer to Earth than 15 million miles (24 million kilometers).
“It’s as though Earth is playing follow the leader,” said Amy Mainzer, the principal investigator of NEOWISE at NASA’s Jet Propulsion Laboratory in Pasadena, Calif. “Earth always is chasing this asteroid around.”
A handful of other asteroids also have orbits similar to Earth. Such objects could make excellent candidates for future robotic or human exploration. Asteroid 2010 TK7 is not a good target because it travels too far above and below the plane of Earth’s orbit, which would require large amounts of fuel to reach it.
“This observation illustrates why NASA’s NEO Observation program funded the mission enhancement to process data collected by WISE,” said Lindley Johnson, NEOWISE program executive at NASA Headquarters in Washington. “We believed there was great potential to find objects in near-Earth space that had not been seen before.”
NEOWISE data on orbits from the hundreds of thousands of asteroids and comets it observed are available through the NASA-funded International Astronomical Union’s Minor Planet Center at the Smithsonian Astrophysical Observatory in Cambridge, Mass.
JPL manages and operates WISE for NASA’s Science Mission Directorate in Washington. The principal investigator, Edward Wright, is a professor at the University of California, Los Angeles. The mission was selected under NASA’s Explorers Program, which is managed by the agency’s Goddard Space Flight Center in Greenbelt, Md. The science instrument was built by the Space Dynamics Laboratory in Logan, Utah.
The spacecraft was built by Ball Aerospace & Technologies Corp., Boulder, Colo. Science operations and data processing take place at the Infrared Processing and Analysis Center at the California Institute of Technology in Pasadena. Caltech manages JPL for NASA.
For more WISE information visit: http://www.nasa.gov/wise.
The most recent issue of Science News (18 December 2010) has the following notes from 17 December 1960:
However, if you want to travel to the Moon or journey anywhere within the Solar System, Galactic Cosmic Radiation will require that the human crew is protected. Let’s take a look at the problem and the research required to test and implement solutions.
The GCR problem arises from interstellar atomic nuclei traveling near the speed of light striking the structure of a spacecraft. The resulting shower of secondary particles cause radiation damage. The Earth is protected by the Van Allen belts and a deep atmosphere. Brief journeys such as an Apollo mission does not expose the astronaut to dangerous dosages. However, astronauts on such a journey are at risk from Solar flares (Solar Particle Events - SPE). SPEs can be mitigated with layers of hydrogen rich materials such as polyethylene or water. GCRs, however, require spaceships on long journeys of more than 100 days, or habitats on the Lunar or Martian surface, to be surrounded by tens of meters of water for passive protection, or magnetic shields for active protection. Either solution is extremely heavy and makes space flight prohibitive in terms of propellant requirements.
The Source of GCR
Galactic Cosmic Rays come from outside our Solar System, but from within our galaxy, the Milky Way. They are comprised of atomic nuclei that have been stripped of their electrons. These nuclei can be any element. Common elements are carbon, oxygen, magnesium, silicon, and iron with similar abundances as the Solar System. Lithium, Berylium and Boron are overabundant relative to the Solar System ratios.
The Shielding Problem
Early on, it was suggested that cosmic rays could penetrate the Apollo spacecraft. From “Biomedical Results of Apollo” section IV, chapter 2, Apollo Light Flash Investigations we have the following account:
When Galactic Cosmic Rays collide with another atom, such as those contained in the Aluminum, Stainless Steel or Titanium structures of a spacecraft, they can create a shower of secondary particles, These secondary particles cause radiation damage in living organisms (humans).
The problem is creating sufficiently powerful barriers to these extremely energetic nuclei.