JUICE Earth Flyby 2026: How ESA Used Our Planet to Bend a Path Toward Jupiter

ESA’s Jupiter Icy Moons Explorer passed Earth on September 28, 2026, using our planet’s gravity to alter its route and gain speed on the way to Jupiter.

ESA reported that JUICE passed Earth on September 28, coming about 8,640 km above the Indian Ocean at closest approach. The encounter changed its direction by about 20 degrees and increased its velocity by roughly 3.5 km/s relative to its incoming path.

Why this matters: ESA’s Jupiter Icy Moons Explorer passed Earth on September 28, 2026, using our planet’s gravity to alter its route and gain speed on the way to Jupiter.

The September 2026 Earth flybyESA reported that JUICE passed Earth on September 28, coming about 8,640 km above the Indian Ocean at closest approach. The encounter changed its dire

How does a gravity assist work?A gravity assist lets a spacecraft fall toward a moving planet, curve around it and leave on a new trajectory. Mission designers use the planet’s grav

What did JUICE photograph?JUICE’s monitoring camera photographed Earth as the spacecraft moved away from closest approach. A separate Navigation Camera test produced a black-an

Earth was also a testbenchThe flyby gave instrument teams another chance to calibrate and validate hardware using a familiar target. JUICE also spent time in Earth’s magnetotai

The September 2026 Earth flyby

JUICE Earth flyby trajectory — ESA’s planned Earth-flyby path for JUICE. Credit: ESA/ATG Europe.

How does a gravity assist work?

A gravity assist lets a spacecraft fall toward a moving planet, curve around it and leave on a new trajectory. Mission designers use the planet’s gravity and orbital motion to save propellant while reaching destinations that would otherwise require much more launch energy.

What did JUICE photograph?

JUICE’s monitoring camera photographed Earth as the spacecraft moved away from closest approach. A separate Navigation Camera test produced a black-and-white view of Madagascar only minutes after the closest pass.

JUICE NavCam Madagascar image — JUICE NavCam view of Madagascar during the 2026 flyby. Credit: ESA/Juice/NavCam.

Earth was also a testbench

The flyby gave instrument teams another chance to calibrate and validate hardware using a familiar target. JUICE also spent time in Earth’s magnetotail, giving teams useful measurements of magnetic fields and charged particles before the mission reaches Jupiter.

What happens next?

JUICE is scheduled to return to Earth again in 2029, then continue toward Jupiter for arrival in 2031. Its science mission will focus on Jupiter and the large ocean-bearing moons Ganymede, Callisto and Europa.

Read our Europa hidden-ocean guide for more background.

Simple takeaway: ESA’s Jupiter Icy Moons Explorer passed Earth on September 28, 2026, using our planet’s gravity to alter its route and gain speed on the way to Jupiter.