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    First Launch Opportunity Waved off Due to Aircraft Communication Issues

    The first launch opportunity of a Pegasus XL rocket, carrying NASA's Ionospheric Connection Explorer (ICON), was skipped due to communication issues between the ground team at Cape Canaveral Air Force Station in Florida and Northrop Grumman's L-1011 aircraft, Stargazer. The launch team is re-evaluating; the launch window remains open until 10:55 p.m. EDT.

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    Stargazer Enters the Drop Box

    The Northrop Grumman Pegasus XL rocket, carrying NASA's Ionospheric Connection Explorer (ICON), has arrived at the Skid Strip at Cape Canaveral Air Force Station in Florida on Oct. 1, 2019.

    Northrop Grumman's Stargazer aircraft, carrying the company's Pegasus XL rocket with NASA's Ionospheric Connection Explorer (ICON), has entered the drop box – a 40-mile long area that the rocket can be dropped in. At this point, Stargazer has reached the required altitude of 39,000 feet. In just a few moments, the rocket will drop from …

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    ICON Launch Countdown Continues

    An artistic representation of the Northrop Grumman L-1011 Stargazer flight path and Pegasus XL rocket launch trajectory. Please note: Images are not to scale.

    Follow along on NASA TV and the agency's website for the live launch broadcast, happening now. Before NASA's Pegasus XL rocket can carry the agency's ICON satellite to low-Earth orbit, Northrop Grumman's L-1011 Stargazer aircraft has to reach an altitude of 39,000 feet, which requires about an hour of flight time. Once there, Pegasus will …

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    Stargazer Aircraft Now Airborne

    Northrop Grumman's L-1011 Stargazer takes off from Cape Canaveral Air Force Station in Florida on Oct. 10, 2019. The company's Pegasus XL rocket, containing NASA's Ionospheric Connection Explorer (ICON), is attached beneath the aircraft.

    Northrop Grumman's Stargazer aircraft is airborne after taking off from the Skid Strip runway at Cape Canaveral Air Force Station. Stargazer is carrying the company's Pegasus XL rocket – a small expendable rocket that is the only operational air-launched rocket in the world. Pegasus is attached beneath the aircraft and will be carried to an …

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    Stargazer Preparing for Takeoff

    Northrop Grumman's L-1011 aircraft, Stargazer, prepares for takeoff at the Cape Canaveral Air Force Station Skid Strip in Florida on Oct. 10, 2019. Attached beneath the aircraft is the company's Pegasus XL rocket, carrying NASA's Ionospheric Connection Explorer (ICON).

    Stargazer's engines have powered up on the Skid Strip runway at Cape Canaveral Air Force Station in Florida. Takeoff is scheduled for 8:33 p.m. EDT. Stick with us here on the blog for live updates.

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    Stargazer Aircraft Carrying Pegasus XL Rocket Positioned for Takeoff

    Backdropped by a twilight sky, Northrop Grumman's L-1011 Stargazer undergoes final preparations prior to its takeoff from Vandenberg Air Force Base in California on Oct. 1, 2019.

    A Northrop Grumman L-1011 Stargazer aircraft is positioned for takeoff from the Skid Strip runway at Cape Canaveral Air Force Station. Takeoff is scheduled for 8:33 EDT tonight. Attached to the aircraft is a Pegasus XL rocket, carrying NASA's Ionospheric Connection Explorer, or ICON, satellite. Weather officials are predicting an 80% chance of favorable weather …

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    Teams Prepare for ICON Launch Tonight

    The Ionospheric Connection Explorer (ICON) will launch tonight on a Northrop Grumman Pegasus XL rocket from the company's Stargazer L-1011 aircraft. The Stargazer will take off from the Cape Canaveral Air Force Station at 8:33 p.m. EDT. The first launch attempt for ICON is 9:30 p.m. EDT. Follow live coverage here on the blog as well …

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    “Another Planet:” Exploring Hunga Tonga-Hunga Ha’apai

    Collecting a side-scan sonar transect of the crater lake. The Lowrance is in the foreground, with Cam and Grace towing it in another inflatable raft. The crater wall is also in the background. Credit: SEA

    By Grace Callahan /HUNGA TONGA-HUNGA HA'APAI, KINGDOM OF TONGA/ Hello from the newest land mass on earth! I'm Grace, and today was my first day on Hunga Tonga Hunga Ha'apai. (I spent yesterday on the ship, helping to ensure that our anchor wouldn't slip and allow us to be blown out to sea.) After breakfast …

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    ICON Launch Moved Back 24 Hours

    Due to weather in the area, NASA and Northrop Grumman have decided to move the Pegasus XL and ICON launch 24-hours to October 10 at 9:30 p.m., with takeoff of the Stargazer L-1011 at 8:32 p.m. NASA's live broadcast will begin tomorrow at 9:15 p.m. on www.nasa.gov/live. The teams are not working any issues. The …

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    Early Reports from HTHH, Tonga

    Students with the Sea Education Association's SSV Robert C. Seamans after landing on beach of HTHH. Credit: SEA

    by Frank Wenninger and Michael Tirone /HUNGA TONGA-HUNGA HA'APAI, KINGDOM OF TONGA/ As we labored down into the zodiac with our gear and rations, the ocean splashed violently around us. Those with hats cowered under the power of the southeasterly winds, and those in the front surrendered to the incessant spraying of the ocean. The …

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