NASA's Psyche Spacecraft Sent Back Some Awesome Photos of Mars
NASA's Psyche spacecraft flew by Mars on May 15, using the planet as a gravitational slingshot toward the asteroid belt, and captured stunning time-lapse images and atmospheric data along the way.
Intelligence analysis by Llama
On its way to a metal-rich asteroid, NASA's Psyche spacecraft swung past Mars for a gravity assist and took the opportunity to photograph the Red Planet over a month-long flyby, producing a dramatic eye-shaped time-lapse and testing its science instruments in the process.
A NASA spaceship on its way to a giant space rock took a quick trip past Mars to get a speed boost, like swinging on a playground arm to go farther. While it was there, it snapped a whole month of pictures of Mars and made a cool video that makes the planet look like a glowing eye in space.
Analysis
A Gravitational Slingshot with a Side of Science
Psyche's May 15 encounter with Mars was never the headline objective. The spacecraft launched in 2023 with its sights set on Psyche, a rare metal-rich asteroid orbiting the Sun between Mars and Jupiter. Mars was always going to be a waypoint, a convenient source of gravitational energy to bend the spacecraft's trajectory and save propellant. What makes this flyby noteworthy is that NASA treated a routine maneuver as a science opportunity. Every instrument on board was pointed at the Red Planet, and the teams behind the imager, magnetometer, and gamma-ray and neutron spectrometer worked around the clock, according to principal investigator Lindy Elkins-Tanton of the University of California, Berkeley.
The geometry of the encounter gave the data a distinctive character. Psyche approached Mars during a high phase crescent, meaning only about 4% of the planet was sunlit. That sliver of illumination, as Hannah Zigo of the multispectral imager team at Arizona State University noted, was enough to make the Martian atmosphere visibly glow around the dark limb of the planet. The result is an eye-shaped composite built from daily images taken between May 2 and May 31, stitched into a single striking frame and condensed into a 75-second video.
The Imager Steals the Show
The imager was the clear MVP of the flyby. Jim Bell, the imager instrument lead at Arizona State, said it "performed brilliantly, delivering some rarely seen views of the Red Planet." Beyond the aesthetic payoff, the team used the encounter to fully calibrate the instrument and to test its sensitivity to scattered light. In one notable exercise, the imager resolved Mars' two small moons, Phobos and Deimos, from a great distance, essentially a dress rehearsal for a similar search Psyche will perform when it arrives at asteroid Psyche to look for any moonlets orbiting the space rock.
Other instruments contributed too, measuring how Mars' thin atmosphere interacts with solar wind and capturing neutron readings from the surface. The science team did not expect groundbreaking discoveries, given how thoroughly Mars has already been studied, but the data set will sharpen existing models of the planet's near-space environment.
Practice Runs for the Real Target
The Mars encounter is best understood as a shakedown cruise. Psyche's instruments were designed for an airless, distant asteroid, not a planet with an active atmosphere, so any successful measurement here raises confidence that the hardware will survive and function at its destination. The moonlet search is a particularly useful dry run, because the asteroid Psyche could host small satellites whose detection would reshape mission planning. Arrival is expected in August 2029, giving the team more than three years to refine procedures based on what they learned swinging past the Red Planet. For now, the public dividend is a batch of images that are as scientifically instructive as they are visually arresting.
Key points
- NASA's Psyche spacecraft flew by Mars on May 15, using the planet as a gravitational slingshot toward its asteroid target.
- A month-long time-lapse captured between May 2 and May 31 was condensed into a 75-second video showing Mars as a glowing crescent.
- Only about 4% of Mars was illuminated during the flyby, which made the planet's atmosphere visibly glow around its dark edge.
- The imager team used the encounter to calibrate the instrument and resolved Mars' moons Phobos and Deimos from far away, a test run for searching moonlets around asteroid Psyche.
- Psyche is expected to reach its namesake asteroid in August 2029.
If the imager's performance at Mars is any indication, Psyche is well calibrated and ready for its 2029 arrival at the asteroid, where detecting any small moonlets could meaningfully expand the science return. The flyby also demonstrates that NASA can extract significant science value from gravity-assist flybys, potentially justifying similar opportunistic campaigns on future missions.
The data from the flyby is unlikely to upend decades of Mars research, and the month-long imaging window, while dramatic, represents time and resources diverted from the spacecraft's primary asteroid mission. Any anomalies uncovered during instrument calibration will need to be addressed years before arrival, and a single well-publicized flyby success can mask the longer, quieter risks of a deep-space mission still years from its real objective.
