NASA’s twin ESCAPADE spacecraft are preparing to use Earth as a gravitational and powered springboard towards Mars. The first flyby and engine burn is scheduled for 7 November 2026, with the second following on 9 November. Each refrigerator-sized spacecraft will combine Earth’s gravity with an approximately nine-minute engine burn near closest approach, increasing its speed by more than 1,000 miles per hour before beginning a ten-month cruise to Mars. This is a planned mission milestone, not a completed success: several days of tracking will be needed to confirm the accuracy of each trajectory. If the manoeuvres work as intended, ESCAPADE will reach Mars in September 2027 and become the first coordinated multi-spacecraft mission to study the planet’s space environment.
Key takeaways
- ESCAPADE consists of two spacecraft designed to study how the solar wind removes particles from Mars’s atmosphere.
- Their powered Earth flybys are scheduled for 7 and 9 November 2026.
- Each spacecraft will use gravity and an engine burn lasting about nine minutes.
- The manoeuvre should raise speed from about 6.3 to 6.7 miles per second.
- The spacecraft are expected to arrive at Mars on 7 and 9 September 2027.
- The flybys had not occurred when this article was checked on 6 November.
What is the ESCAPADE mission?
ESCAPADE stands for Escape and Plasma Acceleration and Dynamics Explorers. The mission is led by the University of California, Berkeley’s Space Sciences Laboratory and supported through NASA’s Small Innovative Missions for Planetary Exploration programme. Its two spacecraft are designed to make coordinated measurements around Mars.
The mission’s central question is how the solar wind interacts with Mars and helps remove atmospheric particles. The solar wind is a stream of charged particles flowing outwards from the Sun at roughly a million miles per hour. Earth is protected by a strong global magnetic field, but Mars does not possess an equivalent planet-wide shield. The Red Planet has patches of magnetised crust and a thin atmosphere that interacts directly with the solar wind.
Understanding that environment helps explain how Mars changed from a wetter ancient world into the cold, dry planet seen today. Evidence from ancient Martian meteorites and rover investigations shows that water once interacted extensively with Martian rocks. ESCAPADE approaches the same planetary history from above by measuring the present-day escape of atmospheric material.
Why ESCAPADE did not travel directly to Mars
The usual launch-window problem
Earth and Mars reach a favourable alignment approximately every 26 months. Most Mars missions launch during these windows and enter an energy-efficient transfer orbit. ESCAPADE launched in November 2025, when the planets were poorly positioned for a direct trip.
Instead, the spacecraft entered an unusual Earth-proximity route. They travelled in a kidney-bean-shaped loop around the region of the Earth-Sun L2 Lagrange point before returning towards Earth as the planets moved into a better alignment. Readers can explore the underlying orbital balance in Earth Site’s guide to Lagrange points.
This loitering strategy could make some future missions less dependent on a narrow launch window. It does not abolish orbital mechanics: the spacecraft still need the correct geometry and enough energy to intercept Mars.
What makes the flyby “powered”?
A conventional gravity assist changes a spacecraft’s speed and direction relative to the Sun by passing close to a moving planet. Earth Site’s article on how gravity assists work explains why this does not create energy from nothing.
ESCAPADE will add a substantial engine burn near closest approach. Performing the burn while moving fastest makes each unit of propellant more effective, an application of what is often called the Oberth effect. NASA describes this as the first planned successful powered Earth flyby by a Mars-bound agency spacecraft.
The planned November manoeuvres
The first spacecraft is scheduled to make closest approach at about 10:00 UTC on 7 November, while the second follows at about 11:00 UTC on 9 November. Each should pass between approximately 600 and 1,100 miles above Earth. The burns begin as the spacecraft pass over southern Australia.
During each nine-minute trans-Mars injection burn, speed should increase from roughly 6.3 to 6.7 miles per second—about 10.1 to 10.8 kilometres per second. That change appears modest as a percentage, but it is sufficient to reshape the orbit from an Earth-returning path into an interplanetary trajectory.
Mission controllers will use tracking data to determine how accurately the spacecraft were aimed. Several trajectory-correction manoeuvres are planned during the cruise. It would therefore be premature to report the flybys as successful before post-burn tracking confirms the new paths.
Bonus science near Earth’s magnetotail
The unusual route has already taken ESCAPADE through a distant, previously unsampled part of Earth’s magnetotail. The magnetotail forms on the night side as the solar wind stretches Earth’s magnetic environment away from the Sun. Mission scientists have reported interesting structure and activity but had not released a complete analysis by 6 November.
This preliminary report should be distinguished from a peer-reviewed result. It is promising “bonus science”, not yet a confirmed discovery. The context can be explored through Earth Site’s guides to planetary magnetospheres and the TRACERS space-weather mission.
What ESCAPADE will do at Mars
The spacecraft are scheduled to arrive on 7 and 9 September 2027. After orbit insertion and commissioning, they will fly in coordinated formations. Measurements taken at two places or times can reveal how quickly Mars’s magnetic and plasma environment changes.
ESCAPADE will examine fields, charged particles and the movement of energy through the upper atmosphere. Researchers want to identify how solar conditions drive atmospheric escape and how localised crustal magnetic fields alter that process.
The mission cannot directly reconstruct every stage of Mars’s atmospheric history. Scientists will combine its current measurements with geological evidence, climate models and results from earlier missions. The mission’s value comes from improving the physical rules used in those models.
Why the mission matters for future exploration
Atmospheric escape shaped Mars over billions of years, but space weather also matters on human timescales. Solar particles and radiation can affect spacecraft electronics, communications and astronaut exposure. ESCAPADE’s cruise measurements will sample part of the interplanetary environment travelled by Mars-bound crews.
The mission also tests whether comparatively small spacecraft can perform coordinated planetary science. If successful, similar architectures could place multiple instruments around another world for less than one large flagship mission, although smaller spacecraft have tighter limits on power, payload and redundancy.
Conclusion
ESCAPADE’s November flybys are an ambitious piece of mission design: two spacecraft will combine Earth’s gravity with carefully timed engine burns to begin their final journey to Mars. The technique could widen options for future planetary launches, while the mission’s science will examine why Mars continues to lose atmosphere. For now, the correct status is “scheduled”. Confirmation will come only after the engines fire, communications continue and tracking shows that both spacecraft are accurately travelling towards Mars.
Frequently asked questions
When will ESCAPADE fly past Earth?
The two powered flybys are scheduled for 7 and 9 November 2026.
Has ESCAPADE reached Mars?
No. Arrival is planned for 7 and 9 September 2027.
Why are there two spacecraft?
Coordinated measurements help scientists separate changes occurring across space from changes occurring over time.
What is an Oberth manoeuvre?
It is an engine burn performed while a spacecraft is moving quickly near a massive body, allowing propellant to produce a particularly useful change in orbital energy.
Will ESCAPADE prove exactly how Mars lost its atmosphere?
It will test important processes and improve models, but scientists must combine its measurements with evidence from many other missions and geological studies.
