Monday, March 16, 2015


UPDATES    →   March 17,  2015



UPDATE 1  →   March 17,  2015

Watch NASA launch its mission to the magnetosphere tonight (update)

If all goes well, NASA will finally launch its Magnetospheric Multiscale (MMS) observatories tonight. Comprised of four identical spacecraft (shown above in a clean room), its purpose is to study the magnetic fields around Earth for information on how they connect and disconnect. The MMS is headed to areas that scientists believe are the sites where magnetic reconnection occurs, but first it has to get off the ground. The launch is scheduled for 10:44PM ET at Cape Canaveral Air Force Station, and all conditions are go. You can watch live on NASA TV, and a stream is embedded after the break.

Update: The launch was successful and the mission is on its way, check after the break for a replay and to see more information on exactly what its satellites will be studying.

READ MORE.  http://goo.gl/IJcYFa

UPDATE 2  →   March 17,  2015

A miniature electrical propulsion system could let small satellites fly in formation for cheaper imaging.

Why It Matters

Microsatellites are cheap to launch and operate, but they normally cannot be maneuvered.

Natalya Brikner, CEO of the startup Accion Systems, holds an impossibly small spacecraft thruster in the palm of her hand. It looks more like a computer chip than a rocket—a gold-coated square of silicon the size of a dime.

Accion’s thruster has 480 barely visible nozzles etched into the surface of that silicon. It relies on a type of electronic propulsion that to date has only been used on a few space missions. An electric field is used to accelerate charged particles, normally using ions generated from a gas propellant, to create thrust.

Dozens of Accion’s thrusters can be packaged, along with a fuel tank, into a space propulsion system about the size of a deck of cards. Brikner says the technology, which will be launched into space on its first satellite in July, will make it practical to add propulsion to low-cost satellites that are as small as a tissue box, making them considerably more useful.

Microsatellites have largely been used for research, but commercial applications are gaining traction (see “Startup Plans Constellation of Tiny Monitoring Satellites”). The commercial potential of the technology was highlighted last year by Google’s $500 million acquisition of Skybox, whose small imaging satellites weigh 5 percent as much as conventional ones.

The capabilities of such satellites have been limited in part because they typically cannot maneuver themselves. Propulsion systems have proved difficult to shrink. Conventional thrusters tend to lose efficiency and power at small sizes, and they can double the size of a small satellite, making it too expensive to launch into space.

The systems normally used to ionize gases for electronic propulsion are also typically bulky. But Accion eliminated some of this bulk by using an ionic liquid (a salt that’s liquid at room temperature). “We don’t have to do any ionization in space; it’s done already on the ground,” Brikner says.

Adding propulsion to microsatellites could allow clusters of them to fly in formation, allowing them to mimic the performance of much larger and more expensive satellites for applications such as imaging. Propulsion could also help microsatellites maintain orbit instead of slowly deorbiting, allowing them to last up to 10 times longer.

Other companies, including Aerojet Rocketdyne and Busek, are also developing miniaturized thrusters for small satellites. “It’s a micro space race to see who will launch these things into space first,” says Paulo Lazano, director of MIT’s Space Propulsion Lab, where the basic technology behind Accion was developed.

READ MORE.  http://goo.gl/C5e4Vz

UPDATE 3  →   March 17,  2015

Watch NASA launch its mission to the magnetosphere tonight (update)

blogger-avatar by Richard Lawler | @Rjcc | 3 days ago

If all goes well, NASA will finally launch its Magnetospheric Multiscale (MMS) observatories tonight. Comprised of four identical spacecraft (shown above in a clean room), its purpose is to study the magnetic fields around Earth for information on how they connect and disconnect. The MMS is headed to areas that scientists believe are the sites where magnetic reconnection occurs, but first it has to get off the ground. The launch is scheduled for 10:44PM ET at Cape Canaveral Air Force Station, and all conditions are go. You can watch live on NASA TV, and a stream is embedded after the break.

Update: The launch was successful and the mission is on its way, check after the break for a replay and to see more information on exactly what its satellites will be studying.

READ MORE.  http://goo.gl/IJcYFa

Andres Agostini is a Business-Success Consultant  www.AMAZON.com/author/agostini