TerreStar Corporation (TSTR) President, Chief Executive Officer and Chairman of the Board to Ring the NASDAQ Stock Market Closing Bell


ADVISORY, Aug. 15, 2007 (PRIME NEWSWIRE) --



 What:
 William M. Freeman, Chairman of the Board, and Robert H. Brumley,
 President, Chief Executive Officer, of TerreStar Corporation (TSTR)
 will preside over the closing bell to celebrate the company's name
 change from Motient Corporation to TerreStar Corporation, effective
 on August 16th.

 Where:
 NASDAQ MarketSite - 4 Times Square - 43rd and Broadway - Broadcast Studio

 When:
 Thursday, August 16, 2007 at 4:00 p.m. ET

 Contacts:
 TerreStar Media Relations
 Andrew Krejci
 TerreStar Networks Inc.
 703.483.7856
 andrew.krejci@terrestar.com

 NASDAQ MarketSite:
 Jolene Libretto; 646.441.5220; mobile - 347.219.9539
 Jolene.Libretto@NASDAQ.com

Feed Information:

The closing bell is available from 3:50 p.m. to 4:05 p.m. on uplink IA-6 C-band/transponder 17. The downlink frequency is 4040 Vertical; Audio 6.2-6.8 The feed can also be found on Waterfront fiber 1623. If you have any questions, please contact Jolene Libretto at (646) 441-5220.

Radio Feed:

An audio transmission of the closing bell is also available from 3:50 p.m. to 4:05 p.m. on uplink IA6 C band / transponder 24, downlink frequency 4180 horizontal. The feed can be found on Waterfront fiber 1623 as well.

Webcast:

A live Webcast of the NASDAQ Closing Bell will be available at: http://www.nasdaq.com/reference/marketsite_about.stm

Photos:

To obtain a hi-resolution photograph of the Market Close, please go to http://www.nasdaq.com/reference/marketsite_events.stm and click on the market close of your choice.

About TerreStar Corporation (TSTR):

TerreStar Corporation, formerly Motient Corporation, is the controlling shareholder of TerreStar Networks Inc. and TerreStar Global Ltd., and a shareholder of SkyTerra Communications and Mobile Satellite Ventures LP. For additional information on TerreStar Corporation, please visit the company's website at www.terrestarcorp.com.