5 million, also supplying payload processing services, in
support of U.

Orbital to Announce First Quarter 2005 Financial Results on April 21; 9:00 a.m. Conference Call with Financial Analysts and Investors to be Webcast

Orbital Awarded Contract by U.S. Air Force to Provide Responsive Launch Vehicles; Company to Offer Two Air-Launched ''Raptor '' Vehicles Based on Flight-Proven

About Orbital

Orbital is one of the world's leading developers and manufacturers
of affordable space systems for commercial, civil government and
military customers.

iss sightings

Orbital will also conduct a conference call
with financial analysts and investors the same morning, beginning at
9:00 a.
More information about Orbital can be found at
http://www .S.

anatoly spacecraft

To date, Astrotech has successfully processed more than 220
spacecraft and, with its unique five-meter processing capabilities at
its Florida facilities, is positioned to support the next generation
of manned and unmanned space vehicles.com) is a leading provider of
commercial and government space services with three primary business
units. The Flight Services business unit develops, owns , and operates
habitat and laboratory modules and cargo carriers aboard NASA's Space
Shuttles for Space Station resupply and research purposes. SPACEHAB's
Astrotech subsidiary provides payload processing support services for
both commercial and government customers at company-owned facilities
in Florida and California.com
The statements in this document may contain forward-looking
statements that are made pursuant to the Safe Harbor provisions of the
Private Securities Litigation Reform Act of 1995. A replay of the conference call will be
available approximately two hours after the end of the call and will
remain active until Thursday, April 28, 2005. The Raptor 2 is
air-launched from a C-17 military cargo and transport aircraft, using
a parachute-based extraction system recently demonstrated on Orbital's
successful flight of the Medium Range Target (MRT) vehicle earlier
this year.

esid iss

In the government arena, Astrotech was recently awarded a contract
valued at $2. Government missions. Thompson, Chairman and Chief Executive Officer

Mr. Both vehicles are approximately 55 feet in
overall length and weigh 50,000 pounds at liftoff, not including the
satellite payload .

propulsion armchair

Both Raptor 1 and Raptor 2 vehicles will employ the most
current generation of avionics equipment that have been developed by
Orbital as a common modular suite across all of the company's launch
vehicle product lines.

propulsion calculate

James R.orbital.

visible esa

The total value of the two
contracts is approximately $1. Satrom said, "Having been at the
forefront of the commercial space industry for over 20 years , we are
excited about providing our unique services to a growing government
business base.thespacestore .m. David W. Pierce, Vice Chairman and Chief Financial
Officer

Mr. The company's primary products are satellites and
launch vehicles, including geostationary and low-orbit spacecraft for
communications, remote sensing and scientific missions; ground- and
air-launched rockets that deliver satellites into orbit; and missile
defense boosters that are used as interceptor and target vehicles.

orbital ionizing

Business Editors/Government Writers

HOUSTON----SPACEHAB, Incorporated
(Nasdaq /NMS:SPAB), a leading provider of commercial space services,
today announced that its satellite processing and facility services
subsidiary, Astrotech Space Operations, has been awarded new payload
processing contracts in both the commercial and government sectors.
"These new missions represent a continuation of a longstanding,
successful relationship between Boeing and Astrotech," stated John B. Additionally , through The
Space Store, Space Media provides space merchandise to the public and
space enthusiasts worldwide (www.
The Company assumes no obligation to update these forward-looking
statements.

----Orbital Sciences
Corporation (NYSE:ORB) announced today that it will release its first
quarter 2005 financial results prior to the opening of the market on
Thursday, April 21, 2005. The company 's primary products are spacecraft and launch
vehicles, including low-orbit, geostationary and planetary spacecraft
for communications, remote sensing and scientific missions; ground-
and air-launched rockets that deliver satellites into orbit; and
missile defense boosters that are used as interceptor and target
vehicles.com

----Orbital Sciences
Corporation (NYSE:ORB) was recently awarded a launch services contract
by the U.

esa propulsion

The
system will provide accurate location data of severe storms and other
weather phenomena resulting in more precise warnings to the public. Processed at Astrotech's
state-of-the-art payload processing facilities in Titusville, Florida,
Deep Impact is comprised of two parts, a fly-by spacecraft and a
smaller impactor, a copper projectile that is scheduled to collide
with the comet Tempel 1 on July 4, 2005 and record photos and data of
the event to send back to Earth.
For webcast registration and information, please visit Orbital's
web site at http://www. 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.

initiator iss

armchair iss

Satrom, Senior Vice President and General Manager of Astrotech Space
Operations.

jump skywatch

75 million. Such forward-looking
statements are subject to risks, trends, and uncertainties that could
cause actual results to be materially different from the
forward-looking statement. These factors include, but are not limited
to, continued government support and funding for key space programs,
product performance and market acceptance of products and services, as
well as other risk factors and business considerations described in
the company's Securities + Exchange Commission filings including the
annual report on Form 10-K.
The Raptor 1 is a winged, 3-stage solid rocket vehicle carried to
launch altitude and released from beneath a carrier aircraft, much as
Oribtal's Pegasus space booster is currently operated.
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.

propulsion visible

(EDT).

exploration ionizing

SPACEHAB Subsidiary Garners $4.25 Million for New Missions; Astrotech Supporting Commercial and Government Launches Coast -to-Coast

Set for a
late 2005 launch onboard a Boeing Delta II vehicle, the WorldView
satellite imaging system offers a wide range of high-resolution Earth
images to customers worldwide.S. military 's need for responsive space launch capabilities, the
company stated today. Orbital has named the vehicles Raptor 1 and
Raptor 2, the designs of which are based upon the flight-proven
technology from Orbital's highly successful family of space launch
vehicles, which have carried out nearly 50 missions over the past 15
years with a strong record of on-time and on-cost performance. Both
Raptor vehicles are designed to be air-launched to provide unrivaled
operational flexibility.

skywatch heavens

"We are pleased to be able to provide our proven
capabilities in support of these exciting missions. The conference call will be hosted by:

Mr.
More information about Orbital can be found at
http://www.

40km orbital

spacehab .

Business Editors

DULLES, Va.S.orbital.

spacecraft ionizing

skywatch spacecraft

Air Force involving two new small launch vehicles to serve
the U. Orbital was awarded two contracts to develop
technical documentation for these vehicles as the first step toward
delivery of launch services under a $100 million indefinite
delivery/indefinite quantity (IDIQ) contract announced by the
government last week.

colonization space

orbital.

40km popularized

Any forward-looking statements in this
document should be evaluated in light of these important risk factors.

Business Editors

DULLES, Va. Thompson, Vice Chairman and Chief Operating
Officer

To listen to the conference call, dial (888) 541-8767, and use the
conference ID number 5586140.com/Investor.
Orbital is one of the world's leading developers and manufacturers
of small space systems for commercial, civil government and military
customers.

initiator armchair

com

40km esid

About SPACEHAB, Incorporated

SPACEHAB, Incorporated (www. Garrett E.

ionizing heavens

In the commercial sector, Astrotech received new contracts from
The Boeing Company (NYSE:BA), to provide payload processing support
services on two upcoming Delta missions. For access to the replay
of the conference call , dial (800) 642-1687 (international callers
should dial (706) 645-9291) and use the same conference ID number.

jump exploration

"
The Geostationary Operational Environmental Satellite (GOES-N)
mission will be processed at the Astrotech facility in Titusville,
Florida, in preparation for a May 2005 liftoff onboard a Boeing Delta
IV launch vehicle from Cape Canaveral Air Force Station. GOES-N is the
first in a series of next generation weather monitoring satellites
operated by the National Oceanic and Atmospheric Administration.
The second purchase order, for the WorldView mission, calls for
the provision of processing services at the Company's Astrotech
facility located on Vandenberg Air Force Base, California. The Company's Government Services business
unit supports NASA's Johnson Space Center providing configuration
management, product engineering, and support services for both the
Space Station and Space Shuttle programs. The company advises
participants to register at least 20 minutes prior to the call to
download and install any necessary audio software.

The science and technology of the study and exploration of space.

calculate skywatch

"
In related news, Astrotech recently celebrated the successful
launch of NASA's Deep Impact spacecraft.