SCIENCE COUNTDOWNS / NASA / ESCAPADE
ESCAPADE Earth Flyby Countdown
Two spacecraft borrow Earth's momentum
ESCAPADE returns toward Earth before setting out for Mars, turning a waiting orbit into an interplanetary departure.
Until the planned November flyby window begins
WHERE THE MISSION STANDS
The threshold ahead.
NASA's twin ESCAPADE spacecraft launched in November 2025 into a long looping trajectory near the Sun–Earth L2 region. NASA plans their return past Earth in November 2026, using a gravity assist to head toward Mars. Their arrival at the Red Planet is a separate milestone, expected in September 2027.
The flyby changes the spacecraft's journey; it does not begin the full Mars science campaign. ESCAPADE will investigate how the solar wind interacts with Mars and contributes to atmospheric loss. Measurements at two locations can help distinguish a changing environment from differences between places.
WHY THE SCIENCE MATTERS
Questions worth returning for.
Why wait in space before going to Mars?
The unusual route separates launch from the later planetary alignment needed for departure. Compare NASA's trajectory explanation with a direct Earth-to-Mars journey: a launch date and an interplanetary departure need not be the same event.
What does a gravity assist change?
A close passage exchanges momentum with a moving planet. The useful evidence will be the mission team's reconstructed trajectory and maneuver reports, rather than the moment a website clock reaches zero.
Why send two spacecraft?
Paired observations will compare different parts of the Martian plasma environment. Follow the later orbit and instrument milestones as well as this flyby before judging what the mission can measure.
CONTINUE THE INVESTIGATION
Follow the thread.
Explore related investigations, Evidence Files, image stories and films.
DATE & SCIENCE SOURCES
NASA describes the Earth gravity assist in November 2026 without specifying a day in the sources reviewed here. The clock marks November 1 at 00:00 UTC as the beginning of that month, not a confirmed encounter time. The two spacecraft may have separate operational timelines.
Schedule source review: . Check the mission agency for later schedule changes.THE NEXT FILES
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