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A retired spacecraft from NASA has completed its long journey in orbit by reentering Earth’s atmosphere. The satellite, known as Van Allen Probe A, fell back to Earth after spending nearly fourteen years circling the planet.
The spacecraft weighed about 1,323 pounds and had originally been launched alongside its twin research satellite. Both probes were designed to study the intense bands of radiation that surround Earth.
Officials confirmed the spacecraft reentered the atmosphere over the eastern Pacific Ocean, where most of its structure likely burned up during the fiery descent.
The Mission That Studied Earth’s Radiation Belts
Van Allen Probe A was launched in 2012 along with its companion spacecraft, Van Allen Probe B. The mission focused on investigating the powerful radiation zones encircling Earth.
These areas, known as the Van Allen radiation belts, contain charged particles trapped by Earth’s magnetic field and can pose risks to satellites and astronauts traveling through space.
The two spacecraft followed highly elliptical orbits that carried them as far as nearly 19,000 miles from Earth before swinging back to just a few hundred miles above the planet’s surface.
Most of the Satellite Likely Burned Up During Reentry
Tracking by the United States Space Force confirmed the satellite reentered the atmosphere early in the morning over the open ocean.
Engineers expected that the intense heat generated during atmospheric entry would destroy most of the spacecraft. However small pieces of hardware may have survived the descent and fallen into the sea.
Experts had previously estimated the chance of debris harming anyone on the ground at roughly one in 4,200, a very low probability due to the vast areas of ocean covering Earth.
Mission Data Still Helps Scientists Study Space Weather
Although the spacecraft were deactivated in 2019, the information they collected continues to be valuable for researchers. Scientists still analyze archived measurements gathered during the mission.
The data helps experts better understand how solar activity affects the radiation environment around Earth. These changes can influence satellites, astronauts, and even technology on the ground.
By studying the radiation belts and their behavior, scientists can improve forecasts of space weather events that may disrupt communications systems, navigation networks, and power grids around the world.