By Sarah Cope | 2026-04-08

NASA’s Escape and Plasma Acceleration and Dynamics Explorers (ESCAPADE) mission is under way following its November 2025 launch aboard Blue Origin’s New Glenn rocket.

The mission employs two identical small spacecraft designed to study how solar wind interacts with Mars’ magnetic environment and atmosphere.

As of early 2026, the spacecraft are operating in a loiter trajectory around the Earth-Sun Lagrange Point 2, an area of gravitational stability that sits about a million miles from Earth.

They will remain in this orbit until November, when Earth and Mars’ orbits are more closely aligned. Then they will travel back towards Earth and leverage its gravity to slingshot towards Mars.

For a fuel-efficient journey to Mars, a spacecraft must launch when the planet is around 45 degrees ahead of Earth in its orbit, so that it will arrive at the exact point where Mars will be several months later.

The launch window to achieve this is roughly two to three weeks per each 26-month cycle. ESCAPADE's loiter trajectory and its exploitation of orbital patterns means it can launch outside of the narrow Earth-Mars transfer window.

While on their roundabout trajectory, the spacecraft will traverse an unexplored region of Earth’s magnetotail -- the long, streaming portion of the magnetic field on the night side of the Earth -- providing an opportunity to collect data.

When they start their 10-month journey to Mars in November, the spacecraft will study the solar wind and the magnetic conditions between Earth and Mars -- the same path astronauts will traverse in a potential manned mission to Mars.

Mission design

ESCAPADE’s distinctive dual-spacecraft configuration enables the two probes to work together while orbiting, providing the opportunity for coordinated measurements.

Most previous missions have relied on a single spacecraft, limiting observations to one location at a time.

The ESCAPADE mission will measure fluctuations in the magnetized environment around Mars, giving researchers a more precise image of the Red Planet's environment.

"When we have two spacecraft crossing those regions in quick succession, we can monitor how those regions vary on timescales as short as two minutes," said Rob Lillis, ESCAPADE’s lead researcher at the University of California, Berkeley.

"This will allow us to make measurements we could never make before."

ESCAPADE is part of NASA’s Small Innovative Missions for Planetary Exploration (SIMPLEx) program, and is designed to be cost effective.

At the bottom end of NASA's four-tier risk scale, the probe's class D mission classification is defined as having "high risk tolerance" and "medium to low complexity," per The Conversation.

ESCAPADE's cost is expected to remain under $100 million by the time its science operations conclude in 2029, due to choices that include a small set of key instruments and a low spacecraft mass to reduce launch costs.

Outsourcing commercial components also saved money: Rocket Lab worked on much of the spacecraft development, while Advanced Space LLC had a hand in the trajectory design.

Even the launch was carried out at a lower cost, as Blue Origin wanted to fly anyway for its own testing objectives, The Conversation noted.

Solar wind’s impact

ESCAPADE’s primary objective is to characterize how the solar wind interacts with Mars’ magnetic environment and contributes to the loss of its atmosphere.

Unlike Earth, Mars does not have an internally generated magnetic field.

Instead, its magnetic field consists of localized magnetic fields in the planet’s crust and a broader magnetic field shaped by interactions between solar winds and charged particles and Mars’ atmosphere.

This inconsistent magnetosphere provides limited protection against the forces of solar wind, leaving the planet's atmosphere exposed to charged particles from the Sun.

This is particularly relevant with the increasing interest in human spaceflight to Mars.

Scientists need to have a better understanding of the environment astronauts would experience.

The mission also will help scientists study the Red Planet's ionosphere, which would impact astronauts’ ability to send radio and navigation signals.

Data collected during ESCAPADE will lay the groundwork for future missions, informing mission planning and spacecraft design.

In addition, ESCAPADE’s probes will examine how energy and particles from solar wind strip away the planet's upper atmosphere, leading to the transition to the current dry and cold Mars of today, away from its warmer, wetter history.

By studying these interactions, researchers can refine models of planetary evolution.

Mars-focused missions

ESCAPADE is one of several efforts focused on Mars infrastructure and science.

NASA has laid out objectives for a Mars communications orbiter, dubbed the Mars Telecommunication Network.

In publicly released documents, NASA outlined plans to provide communications and navigation services for spacecraft planning missions to Mars.

This initiative reflects a focus on sustainable operations on Mars, with investments focusing on understanding the environment -- like ESCAPADE -- and prioritizing mission support systems -- like the communications orbiter.

For now, space-watchers will have to keep an eye out for the November slingshot toward Mars.