McComas and his team at the Southwest Research
Institute for their outstanding work developing the IBEX mission
concept and leading the winning proposal effort. We look forward to
working with the IBEX team and NASA to successfully perform this
mission.
As a result, IBEX is an important early step beyond the solar system
and into the galactic frontier.
Orbital has supported NASA's SMEX program for many years with
reliable launch services and spacecraft.

amsat extraterrestrial

We
congratulate Dr. Orbital is also
building and launching the next SMEX mission, the Aeronomy of Ice in
the Mesosphere (AIM) satellite, scheduled for a September 2006 launch
aboard Pegasus.
"Having flown in both U. and Russian spacecraft, I'm excited
about using my experience to help t/Space create a private-sector
spaceship that will be safe and affordable ," said Mr. Voss.

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"The combination of their small satellite capabilities
and Pegasus launch vehicle makes them a unique partner for this
exciting new mission.

About Orbital

Orbital develops and manufactures small space systems for
military, commercial and civil government customers. A retired U.

About t/Space

Transformational Space Corporation LLC is an entrepreneurial space
company developing vehicles for the Vision for Space Exploration.

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This investigation fills in the critical missing
piece of understanding in the connection of our Sun and solar system
to the galaxy, fulfilling requirements from recent NASA and National
Research Council plans and making fascinating connections to even more
distant astrophysical phenomena.
More information about t/Space can be found at
www .

flown spaceflight

"
NASA awarded t/Space a $3 million contract in September 2004 to
assist the space agency in developing its Moon-Mars exploration plans,
and to begin design of a Crew Exploration Vehicle.

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----Veteran astronaut
James S.

ceos spacetalk

In his last service with NASA, Mr. The research was funded by an
educational grant from t/Space. "Having an astronaut who has
flown in space on the Shuttle, Soyuz, and International Space Station
directly in charge of design, safety, and operability will help
t/Space usher in the era of personal human space flight.com

spacetalk flown

Recent SMEX missions on which
Orbital has played a key role include the Reuven Ramaty High Energy
Solar Spectroscopic Imager (RHESSI), launched aboard Pegasus in
February 2002, and the Galaxy Evolution Explorer (GALEX), built by
Orbital and launched aboard Pegasus in April 2003.ibex.

breakup gravitational

Orbital is a key member of the IBEX mission team, which is
led by Principal Investigator Dr.swri.

Astronaut Jim Voss to Lead Engineering for New Space Company

Voss was Deputy for Flight
Operations in the Space Station Program Mission Integration and
Operations Office.
Last week, t/Space unveiled an engineering mockup of its proposed
Crew Transfer Vehicle (CXV) in Arlington, VA at the International
Space Development Conference presented by the National Space Society.

debris extraterrestrial

S. One of eight
companies that won "Concept Exploration and Refinement" contracts,
t/Space was one of only two to be awarded a full $3 million six-month
option in March 2005.transformspace .

interplanetary gravitational

Business Editors/Technology Editors

DULLES, Va.
Mr.
Contractors on the t/Space team include: Burt Rutan's Scaled
Composites Inc.

Sites for organizations, associations, clubs, forums and any other organized body of people in the Space domain.

Business, education, national and military organizations are, however, in related categories.

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"
Commenting for Orbital, Mr.

More information about Orbital can be found at: www. Voss' experience spans the U.S.

spaceflight reentry

Space Shuttle, the Russian
Soyuz and the International Space Station - a total of five space
flights and 202 days on orbit.

nasawatch astronautical

It featured a lightweight crew seat designed by an Auburn University
research team led by Mr.

archimedes flown

The IBEX mission is scheduled for
launch in 2008 and will be designed for an in-orbit duration of at
least two years. Howard Runge, who will serve as
Orbital's IBEX Spacecraft Manager, said, "We are thrilled with NASA's
selection of the IBEX mission for the Small Explorer program.com

More information about IBEX can be found at:
http://www. He has performed four spacewalks
logging 22 hours of extra vehicular activity.

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More recently, he was Associate Dean of Engineering
at Auburn University where he taught classes on spacecraft design.

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McComas. IBEX also addresses a serious
challenge facing human deep-space exploration by studying the region
that shields out the vast majority of galactic cosmic ray radiation.

Aerospace Writers/Business Editors

RESTON, Va.

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Orbital's IBEX Satellite Selected by NASA for Newest Small Explorer Scientific Mission; Mission to Map Edge of Our Solar System and Study Galactic Cosmic Rays

----

Satellite Designed for Launch Aboard Pegasus Rocket Into
150,000-Mile-Apogee Orbit; Combined Value for Satellite and Launch
Vehicle of Approximately $60 Million

Orbital Sciences Corporation (NYSE:ORB) announced today that the
National Aeronautics and Space Administration (NASA) has selected the
company's Interstellar Boundary Explorer (IBEX) satellite to carry out
the next mission in its Small Explorer (SMEX) series of scientific
spacecraft .

breakup astronautics

The IBEX satellite is based
on Orbital's MicroStar spacecraft design, a lightweight, multi-role
platform of which dozens are already in orbit performing
communications and remote sensing missions ."
The Interstellar Boundary Explorer is a remarkable mission of
exploration and discovery that provides the first global images of the
boundaries between our solar system and the interstellar medium that
fills our galaxy. Voss has accepted an appointment as Vice President for Space
Exploration Systems at Transformational Space Corporation LLC
(t/Space).
"Jim's hands-on experience with human space flight already is
producing breakthroughs for our company, as shown by the crew seat his
team designed that weighs less than 10% of the Space Shuttle seat,"
said David Gump, president of t/Space .

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A solid rocket motor, provided by Alliant
Techsystems (NYSE:ATK), is used to boost IBEX into its highly
elliptical Earth orbit, with an apogee of approximately 150,000 miles
(or nearly two-thirds of the distance to the Moon). The company's
primary products are launch vehicles and satellites, including missile
defense boosters that are used as interceptor and target vehicles,
ground- and air-launched rockets that deliver satellites into orbit,
and low-orbit, geostationary and planetary spacecraft for
communications, remote sensing and scientific missions.

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Voss.

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David McComas of the Southwest
Research Institute in San Antonio, Texas. Together, the
satellite and launch vehicle contracts have an estimated combined
value of approximately $60 million.
"Our team is delighted to be working with Orbital on IBEX," said
Dr.edu/

, which made history recently by rocketing the first
civilian pilot into suborbital space aboard SpaceShipOne; and
AirLaunch LLC, which is under contract with the Defense Department to
develop a low-cost responsive launch vehicle.

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The IBEX spacecraft is designed for launch on Orbital's Pegasus(R)
rocket, which is procured by NASA 's Kennedy Space Center under a
separate contract.orbital.

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Orbital also
offers space-related technical services to government agencies and
develops and builds satellite-based transportation management systems
for public transit agencies and private vehicle fleet operators. Army
colonel and NASA astronaut, he has 30 years of operational and
management experience, including military flight testing .