Rescue op launched to save NASA telescope that's falling back to Earth, Pg2

Key Highlights:

• A rescue mission was launched for NASA's Swift Observatory, which is at risk of crashing back to Earth due to orbital decay caused by solar storms.
• Katalyst Space Technologies' Link spacecraft was launched on a Northrop Grumman Pegasus rocket from the Marshall Islands to capture and boost the telescope's orbit.
• NASA is paying $30 million for the mission, which aims to raise Swift's altitude by 150 miles (240 kilometers).
• The Swift Observatory, launched in 2004, is crucial for tracking gamma-ray bursts and exploding stars.
• The mission was rapidly developed in nine months, with Swift predicted to re-enter Earth's atmosphere by October without intervention.

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Detailed Insights:

• The Link spacecraft was launched from the belly of a modified airplane, a method chosen for its speed and ability to reach Swift's specific orbital inclination.
• Swift's current altitude is approximately 224 miles (360 kilometers), having decayed from its original orbit due to increased atmospheric drag.
• The rescue operation is expected to take about a month for Link to reach Swift, with the telescope potentially resuming observations by September.
• This mission is considered high-risk, high-reward, demonstrating a new capability for in-space servicing of uncrewed satellites not originally designed for such operations.
• The success of this mission could pave the way for similar operations, such as potentially boosting the Hubble Space Telescope, which is also experiencing orbital decay.
• Swift's science operations were suspended to minimize drag and extend its orbital lifetime, allowing time for the rescue mission.

Scientific/Technical Concepts Involved:

• Orbital decay: The gradual decrease in the altitude of a satellite's orbit, primarily due to atmospheric drag.
• Atmospheric drag: Resistance experienced by a satellite from collisions with gas molecules in Earth's upper atmosphere, causing it to slow down and lose altitude.
• Solar storms: Eruptions on the Sun that can increase the density of Earth's upper atmosphere, leading to enhanced atmospheric drag on satellites.
• Gamma-ray bursts: The most powerful explosions in the universe, which the Swift Observatory is designed to detect and study.