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Explore This Section Perseverance Home Mission Overview Rover Components Mars Rock Samples Where is Perseverance? Ingenuity Mars Helicopter Mission Updates Science Overview Objectives Instruments Highlights Exploration Goals News and Features Multimedia Perseverance Raw Images Images Videos Audio More Resources Mars Missions Mars Sample Return Mars Perseverance Rover Mars Curiosity Rover MAVEN Mars Reconnaissance Orbiter Mars Odyssey More Mars Missions Mars Home 3 min read
Visiting Mars on the Way to the Outer Solar System
Written by Roger Wiens, Principal Investigator, SuperCam instrument / Co-Investigator, SHERLOC instrument at Purdue University
A portion of the “Sally’s Cove” outcrop where the Perseverance rover has been exploring. The radiating lines in the rock on the left of the image may indicate that it is a shatter cone, showing the effects of the shock wave from a nearby large impact. The image was taken by Mastcam-Z’s left camera on March 21, 2025 (Sol 1452, or Martian day 1,452 of the Mars 2020 mission) at the local mean solar time of 12:13:44. Mastcam-Z is a pair of cameras located high on the rover’s mast. This image was voted by the public as “Image of the week.” NASA/JPL-Caltech/ASU Recently Mars has had a few Earthly visitors. On March 1, NASA’s Europa Clipper flew within 550 miles (884 kilometers) of the Red Planet’s surface on its way out to Jupiter. On March 12, the European Space Agency’s Hera spacecraft flew within about 3,100 miles (5,000 kilometers) of Mars, and only 300 kilometers from its moon, Deimos. Hera is on its way to study the binary asteroid Didymos and its moon Dimorphos. Next year, in May 2026, NASA’s Psyche mission is scheduled to buzz the Red Planet on its way to the metal-rich asteroid 16 Psyche, coming within a few thousand kilometers.
Why all these visits to Mars? You might at first think that they’re using Mars as an object of opportunity for their cameras, and you would be partially right. But Mars has more to give these missions than that. The main reason for these flybys is the extra speed that Mars’ velocity around the Sun can give them. The idea that visiting a planet can speed up a spacecraft is not all that obvious, because the same gravity that attracts the spacecraft on its way towards the planet will exert a backwards force as the spacecraft leaves the planet.
The key is in the direction that it approaches and leaves the planet. If the spacecraft leaves Mars heading in the direction that Mars is traveling around the Sun, it will gain speed in that direction, slingshotting it farther into the outer solar system. A spacecraft can typically gain several percent of its speed by performing such a slingshot flyby. The closer it gets to the planet, the bigger the effect. However, no mission wants to be slowed by the upper atmosphere, so several hundred kilometers is the closest that a mission should go. And the proximity to the planet is also affected by the exact direction the spacecraft needs to go when it leaves Mars.
Clipper’s Mars flyby was a slight exception, slowing down the craft — by about 1.2 miles per second (2 kilometers per second) — to steer it toward Earth for a second gravity assist in December 2026. That will push the spacecraft the rest of the way to Jupiter, for its 2030 arrival.
While observing Mars is not the main reason for their visits, many of the visiting spacecraft take the opportunity to use their cameras either to perform calibrations or to study the Red Planet and its moons.
During Clipper’s flyby over sols 1431-1432, Mastcam-Z was directed to watch the skies for signs of the interplanetary visitor. Clipper’s relatively large solar panels could have reflected enough sunlight for it to be seen in the Mars night sky, much as we can see satellites overhead from Earth. Unfortunately, the spacecraft entered the shadow of Mars just before it came into potential view above the horizon from Perseverance’s vantage point, so the sighting did not happen. But it was worth a try.
Meanwhile, back on the ground, Perseverance is performing something of a cliff-hanger. “Sally’s Cove” is a relatively steep rock outcrop in the outer portion of Jezero crater’s rim just north of “Broom Hill.” Perseverance made an approach during March 19-23, and has been exploring some dark-colored rocks along this outcrop, leaving the spherules behind for the moment. Who knows what Perseverance will find next?
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Last Updated Mar 28, 2025 Related Terms
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For Anum Ashraf, Ph.D., the interconnectedness of NASA’s workforce presents the exciting opportunity to collaborate with a multitude of people and teams. With more than 11 years at the agency, Ashraf has played a fundamental role in leading efforts that actively bridge these connections and support NASA’s mission.
Ashraf serves as the mission commitment lead for NASA’s SCaN (Space Communication and Navigation) Program, which is managed through the agency’s Space Operations Mission Directorate. SCaN provides communications and navigation services that are essential to the operation of NASA’s spaceflight missions, including enabling the success of more than 100 NASA and non-NASA missions through the Near Space Network and Deep Space Network. Whether she is supporting missions involving astronauts in space or near-Earth missions monitoring the health of our planet, Ashraf ensures that critical data is efficiently transferred between groups.
Near Space Network antennas at the White Sands Complex in Las Cruces, New Mexico.NASA
“I am the ‘front door’ for all missions that are requesting space communication through the SCaN program,” said Ashraf. “My job is to understand the mission requirements and pair them with the right assets to enable successful back and forth communication throughout their mission life cycle.”
Prior to her current role, Ashraf served as the principal investigator for the DEMETER (DEMonstrating the Emerging Technology for measuring the Earth’s Radiation) project at NASA’s Langley Research Center in Hampton, Virginia. DEMETER is the next-generation observational platform for measuring Earth’s radiation. Leading a team of engineers and scientists across NASA’s multifaceted organizations, Ashraf helped develop an innovative solution that will allow future researchers to assess important climate trends affecting the planet.
Outside of work, Ashraf finds a creative outlet through hobbies like knitting, cross stitching, and playing piano. She brings her ambitious, passionate, and authentic qualities to caring for her two children, who are also her daily source of inspiration.
“Inspiration is a two-way street for me; my kids inspire me to be my best, and, in turn, I inspire them,” said Ashraf. “My kids love telling their friends that we are a NASA family.”
Anum Ashraf, Ph.D., mission commitment lead for NASA’s Space Communications and Navigation Program
Looking toward the future, Ashraf is excited to see a collaboration between NASA, industry, academia, and international space enthusiasts working together towards a common goal of space exploration. As a devoted and collaborative leader, Ashraf will continue to play an important role in advancing the agency’s missions of space research and exploration.
NASA’s Space Operations Mission Directorate maintains a continuous human presence in space for the benefit of people on Earth. The programs within the directorate are the hub of NASA’s space exploration efforts, enabling Artemis, commercial space, science, and other agency missions through communication, launch services, research capabilities, and crew support.
To learn more about NASA’s Space Operation Mission Directorate, visit:
https://www.nasa.gov/directorates/space-operations
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Last Updated Mar 27, 2025 Related Terms
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