NASA’s Perseverance Mars rover has uncovered evidence that a 245-foot-thick (75-meter-thick) stack of ancient rock on the rim of Jezero Crater was built by repeated asteroid impacts. Referred to as the “Broom Point member” by the rover’s science team, this sequence of layered bedrock is likely more than 3.9 billion years old, making it among the oldest terrain ever examined by a Mars rover.  

Released Wednesday in the Journal of Geophysical Research: Planets, the findings offer a window into one of the most tumultuous chapters in the history of the solar system.  

“Since leaving Jezero, Perseverance has been exploring a brand-new frontier, both geographically and geologically — a chapter of Martian time that predates the crater itself,” said Ken Farley, Perseverance deputy project scientist at Caltech in Pasadena, California. “On Earth, our earliest geologic history has been fundamentally broken up, deformed, and erased by plate tectonics. Because Mars lacks plate tectonics to recycle its crust, this ancient record remains intact, giving us a rare glimpse into a geological time period that doesn’t exist on our own planet.” 

Reading between layers 

After ascending the western rim of Jezero Crater in late 2024, Perseverance began examining surrounding locations with its science instruments. Their data at Broom Point revealed six distinct rock types, including breccias — rocks composed of angular fragments — alternating with layers of fine-grained, pulverized rock dust. Rock fragments within the breccias are pocked with gas-bubble cavities, indicating they were once molten. 

The presence of tiny, dark, glassy beads within the layers offered an important clue about how these rocks formed. While volcanoes can produce similar glassy droplets, they rarely occur in such high abundance, pointing to asteroid impacts, instead, as the primary architect. In fact, the largest beads rival those flung out by the dinosaur-killing Chicxulub asteroid’s impact on Earth. 

The repetition of these distinct rock types multiple times throughout this thick sequence of rock indicates that high-energy impact events happened again and again across this region of early Mars. 

“The different rock layers are a record of variable-sized impacts occurring at different distances from where this rock sequence was accumulating,” said Alex Jones, a Ph.D. student in planetary geology at Imperial College London and lead author of the paper. “Some large impacts took place very far away, some small impacts nearby. Their debris all ended up landing here, constructing this thick section of rock.”  

How these layers formed may suggest an interaction with water or ice. Several of the layers look like they may have been formed by fast, ground-hugging debris flows. On Earth, these powerful, fluidlike surges can occur when molten rock hits water or ice that instantly flashes into steam.  

Cosmic one-two punch 

Some of Broom Point’s layers tilt at angles exceeding 80 degrees — nearly vertical — which is far too steep to be caused by the impact that created Jezero Crater.  

Instead, scientists suspect a cosmic “one-two punch” shaped this landscape long ago. First, a colossal asteroid impact created the 1,200-mile-wide (1,900-kilometer-wide) Isidis Basin, one of the largest impact basins on Mars, upending and tilting the once-flat rock layers. Later, a second asteroid likely struck, forming Jezero Crater, which measures 28 miles (45 kilometers) across. This second impact fractured and uplifted the already-tilted rocks into the dramatic formations the rover sees today.  

To pin down exactly when these events took place, the Perseverance team collected two core samples, dubbed “Bell Island” and “Main River.” If a future mission were to return them to Earth, laboratory dating could determine when and how often impacts were occurring on early Mars — and, by extension, the infant Earth, whose own early impact record has been erased by billions of years of plate tectonics. 

“During this violent era, it wasn’t rain or snow falling from the sky, but an almost constant barrage of molten rock droplets and pulverized dust kicked up by asteroid impacts,” said Jones. “If we can pin down the ages of these layers, it would be like reading a cosmic weather report from 4 billion years ago.” 

More about Perseverance 

NASA’s Jet Propulsion Laboratory in Southern California, which is managed for the agency by Caltech, built and manages operations of the Perseverance rover on behalf of the agency’s Science Mission Directorate in Washington, as part of NASA’s Mars Exploration Program portfolio. Arizona State University leads the operations of the rover’s Mastcam-Z instrument, working in collaboration with Malin Space Science Systems in San Diego, on the design, fabrication, testing, and operation of the cameras. SuperCam is led by Los Alamos National Laboratory in New Mexico, where the instrument’s Body Unit was developed. The rover’s SHERLOC (Scanning Habitable Environments with Raman and Luminescence for Organics and Chemicals) instrument was built at NASA JPL, and its WATSON (Wide Angle Topographic Sensor for Operations and eNgineering) camera was built at Malin Space Science Systems.

For more information on NASA’s Perseverance, visit:

https://science.nasa.gov/mission/mars-2020-perseverance

News Media Contacts

DC Agle 
Jet Propulsion Laboratory, Pasadena, Calif.
818-393-9011
agle@jpl.nasa.gov  

Karen Fox / Alana Johnson
NASA Headquarters, Washington
240-285-5155 / 202-672-4780
karen.c.fox@nasa.gov / alana.r.johnson@nasa.gov

2026-045

By Susanne P. Schwenzer, Professor of Planetary Mineralogy at The Open University, UK

Earth planning date: Thursday, June 18, 2026

In the area Curiosity is currently exploring, the science team has mapped several areas with different-looking surface texture on the orbital images. If you wanted to have a look yourself at what there is to see, check the “Where is Curiosity?” map. You’ll discover different shades of orange and beige as well as more rough and more smooth-looking textures. This is what the geomorphologists in our team use to map the areas for exploration by the rover. Of course, we then supplement this all with ground-based images, including bespoke “drive direction imaging,” which is taken after each drive by the Mast Camera. Drive planning is done using a combination of all this information. So there shouldn’t be any surprises, right?

On Monday the team planned three sols in preparation for a Thursday planning to account for the U.S. federal holiday weekend. The workspace turned out to be a little spiky, so we could not find an area we could DRT. APXS still found one good bedrock target, “Rio Baker,” which also had MAHLI documentation. In addition, ChemCam investigated “Rica Aventura,” a textured bedrock, and “Tabebuia,” a darker-looking individual block, using its LIBS and conducted a passive spectral observation on a second dark float block called “Lago Ranco.” Of course, the team also wanted to look into the distance with ChemCam remote imaging, extending our investigation of the Cordillera base outcrop.

Imaging is always high on the list. In Monday’s plan Mastcam is looking into the modern dunes with the “Tacaza” mosaic, and with more mosaics looking forward to the future parking areas, some of which looked really smooth from that vantage point. We also continue our environmental and atmospheric observations looking for dust devils, the opacity of the atmosphere, and monitoring pressure and temperature. After all this, the rover drove about 35 meters (about 115 feet) to an area that looked really smooth in all images we had available at that point. So we were hoping for a good spot to deploy the DRT, but didn’t think we could be in for a surprise.

The drive ended exactly as planned, spot-on in the middle of that — from a distance — smooth-looking area. But when we opened the post-drive images on Thursday morning, we were all reacting with a lot of surprise. From up close, the parking spot looks anything but smooth. You can see the surprise in the title image of this blog. There are polygons, veins, lamination, and probably more, once we inspect the higher-resolution images taken today. “Higher-resolution” is the key for why we were in for such a surprise! The features are quite small, a few centimeters across, and therefore we could not see them in the orbital images or from a distance in our navigation and mast camera images. The camera resolution from a distance just isn’t enough to see them. But up close, the terrain revealed all its beauty! And I am sure there will be more in the even higher resolution of today’s MAHLI and ChemCam RMI imager images!

So, what did we plan after we caught our breath on Thursday? First, you guessed it, images, images, and more images. Mastcam takes a full panorama with its “left eye” and adds a range of closer-up mosaics with its higher-resolution “right eye.” In addition there is a ChemCam Remote Micro Imager image to document structures further afield at high resolution. ChemCam is investigating three targets using LIBS: “Rio Chimore” is a lighter-toned band; you can see some of those in the cover image of this blog, too. The other two LIBS targets are “Rio de Lava,” a vein target, and “Rio de Salta,” one of the polygons. APXS is also looking at the bedrock and the ridges, at the targets “Pampa Grande” and “Iquique Ridge.” MAHLI is having the above-mentioned close “hand lens” look. Let’s see what we will discover when we get those images.

Finally, Curiosity drove up the hill along very smooth-looking terrain that is just littered with tiny polygons. Let’s see if we are in for another surprise reverberating around all our offices — and across two continents, as I had the good fortune to be among the first ones, here in England (Or maybe it was our French ChemCam colleagues, who are in a time zone one hour ahead of me?). Whichever it is, this terrain has a lot to say about the geologic history of Mars!

The post Curiosity Blog, Sols 4927–4933: Let’s Drive to That Smooth Area appeared first on NASA Science.

Written by William Farrand, Senior Research Scientist, Space Science Institute

Earth planning date: Friday, June 12, 2026

Rather than going from stage to stage at a music festival to hear different bands playing different varieties of music, Curiosity has been ascending up Mount Sharp through physical bands of exposed rocks with textural and tonal differences.

Planning for sols 4920 and 4921 were done with the rover in the middle of a unit with a rougher texture and dark-toned bedrock. With the rougher-textured bedrock, brushing wasn’t possible, but APXS chemistry and MAHLI micro-imaging were planned on “as is” bedrock targets “Salto La Cascada” and “Puerto de Rosas.” ChemCam was targeted to perform LIBS spectroscopy on a bedrock target “Kishuara” and a small, layered float rock “La Rosita.” ChemCam’s Remote Micro-Imager (RMI) collected views of the “Mishe Mokwa” butte and another looking at dunes with tonal differences. Mastcam mosaics were collected on the “Valle Grande” channel, “Kimsa Chata” butte, nearby troughs, and the aircraft carrier shaped rock “El Matir.”

Another drive brought Curiosity closer to the upper border of the dark-toned band. Again, brushing of the rocks was not possible, but APXS and MAHLI were collected on dark-toned bedrock targets “Santa Gracia” and “Laguna San Rafael” with ChemCam LIBS also targeting the bedrock. Mastcam mosaics were collected of a layered rock and nearby troughs and a mosaic of the nearby smaller butte, “Miraflores” which displays an interesting layered structure with ragged dark-toned rocks on one side and a stack of dust piled on top (see accompanying image). Other activities included a long-distance RMI mosaic of a bright unit on “Mishe Mokwa”, and Navcam dust-devil surveys in both sols.

Communicating between Earth and Mars has come to seem routine, but at times can still be a challenging endeavor and this was demonstrated to the team on Friday when we did not get a timely downlink of data for the drive planned for Sol 4923. Without these images another drive, in situ examinations, or targeted remote sensing could not be planned. However, there are always interesting things to be done on Mars and the three-sol plan (4924 to 4926) included a 360-degree Mastcam mosaic, the automatic AEGIS targeting of LIBS measurements on each sol, a Navcam dust-devil survey, APXS atmospheric measurements, as well as several other environmental activities.

On Monday, the delayed downlink will be used to plan the first investigation of the next band of surface materials, this one being smooth-textured and light-toned, as well as another drive to continue the surveying of the bands.

The post Curiosity Blog, Sols 4920-4926: Surveying the Bands appeared first on NASA Science.

Celebrating its 90th anniversary this year, NASA’s Jet Propulsion Laboratory invites the public to its campus at the base of the San Gabriel Mountains in Southern California for an open-house event, Explore JPL. On Oct. 10 and 11, from 9:30 a.m. to 4 p.m. PDT, visitors will get the chance to visit JPL’s most iconic facilities and explore four thematic areas: Missions That Changed the World, Moon to Mars, In Flight, and Makerspace. 

Tickets are free but very limited and have gone quickly for past Explore JPL events. They will be available on the Explore JPL webpage at 9 a.m. PDT Saturday, Aug. 29, and will be distributed on a first-come, first-served basis, with a maximum of five tickets per requestor. Orders for more than five tickets may be subject to cancellation. Tickets will be provided for specific time slots and must be reserved for specific names. Attendees will not be admitted to JPL before the designated time printed on their ticket. 

A division of Caltech in Pasadena, California, JPL traces its origins to rocket-propulsion development in 1936. By 1958, the lab had built and helped launch America’s first satellite, Explorer 1. That same year, Congress established NASA, and JPL became a part of the agency. Since then, JPL has managed such historic missions as Voyager, Galileo, Cassini, the Mars Exploration Rover program, the Perseverance Mars rover, Europa Clipper, and many more.

Among other highlights, Explore JPL guests will get to: 

• Visit JPL’s legendary Space Flight Operations Facility, a National Historic Landmark where engineers send commands and receive data from spacecraft billions of miles away. 

• Discover the Spacecraft Assembly Facility and JPL Machine Shop, where precision spacecraft components are crafted. 

• See the latest cutting-edge innovations in robotics research, from autonomous lunar rovers to search-and-rescue robots. 

• Get up close with full-scale models of the Perseverance Mars rover, Voyager, and Galileo. 

• Step inside the Microdevices Laboratory to see how miniature technologies developed there are shaping the future of space exploration and Earth science. 

To attend Explore JPL, visitors must have their tickets in hand and anyone age 18 or over must show government-issued identification. Tickets are not transferable and cannot be sold. Children under age 2 do not require a ticket, but experiences at the event are not intended for very young guests. 

Visitors may not bring these items to JPL: weapons or explosives of any kind, incendiary devices, glass containers, alcohol, cannabis or illegal drugs, pets (except certified service animals), banners or signs, flags, boom boxes, air horns, musical instruments, and professional camera equipment with detachable telephoto lenses. Use of laser pointers or whistles is not allowed. No bags, backpacks, or hard-sided coolers are permitted, either, except small purses and diaper bags. Drones are not allowed to fly over JPL under any circumstances. Skates, skateboards, scooters, Segways, and bicycles are not permitted inside the event, as the venues are crowded with pedestrians. 

Vehicles entering JPL property are subject to inspection. Parking is free. 

Follow JPL on Facebook, X, and Instagram. 

To get a virtual tour of JPL, visit:

https://www. jpl.nasa.gov/virtual-tour/

Media Contact 
JPL-media@jpl.nasa.gov

Eyes on Exoplanets Tutorial

Welcome to NASA’s Eyes on Exoplanets! Use this tutorial to start exploring worlds beyond our own. With this 3D interactive tool, you can visit all the stars beyond the Sun where we’ve found other planets, called exoplanets. 

Choose a star or exoplanet and see an artist’s concept of what it might look like. Spin it around to see its sun and planetary system. Learn how long a trip there from Earth would take at light speed — or by jet plane, or family car!

Study the real versions of planets and stars cited in your favorite science fiction. See which planets reside in habitable zones, where liquid water could exist on their surfaces. Or, search “Where We Explore,” stars that future space telescopes will target when looking for Earth-like planets. You can also choose your location on Earth and see what’s in the sky above you right now.

Select any of the stars shown to see how many planets have already been found there. Examine how those star systems compare to the layout of our solar system, or check the sizes of individual planets — are they as small as Earth, or as big as Jupiter? 

See all the different techniques we’ve used to confirm the 6,000+ exoplanets discovered so far — among the billions we believe exist in the galaxy — and the many observatories, on Earth and in space, that have detected them. You can also browse some of our favorite weird worlds, or destinations featured in our Exoplanet Travel Bureau.

Where will you explore?

Transcript

Welcome to NASA’s Eyes on Exoplanets. With this interactive tool, you can explore all of the stars beyond the Sun where we’ve discovered planets known as exoplanets. When you enter the site, the default is this view from space. You can start your exploration here. Or if you know of a specific star or exoplanet you want to visit, enter that in the search bar at upper right. 

You can also select View from Earth. Choose your location and see what’s in the sky above you right now. Click and drag to explore different parts of the sky. In the lower right corner, you can choose different display options. You can see the constellations, view only stars that are visible to the naked eye, or see the stars that are good places for future telescopes to search for planets like Earth. 

These future target stars are shown as filled-in circles. If you click the gear symbol and switch from the star symbol to the circled number, you will see how many exoplanets have already been found around the star shown. 

When you select a star, you have three different view options. Starting in System View, you will see the star and where planets are located around it. The shaded green area marks the habitable zone, the region around a star where a planet could have liquid water on the surface, a key to the search for life beyond Earth. You can also see how this system compares to our solar system by selecting that feature in the lower right. The star view will show a hypothetical view of what the star might look like. 

Click “Learn More” to see basic information about the star, including its history and pop-culture references. You can see how it compares to our Sun and solar system and what we found so far. Under “How to Detect a Planet in the System,” you can learn about the different ways to discover an exoplanet and see how many planets have been found with each technique, as well as the prospects for discovering more. Finally, the planet view allows you to explore each planet in the system. 

For each confirmed exoplanet, you’ll see an artist’s concept of what it might look like and see how it compares to other planets. Planets also have an option to learn more, where you can see how far away it is, how long it would take to get there, how it was discovered, and which observatory found it. 

To see other discoveries made by that observatory, click “Browse Destinations” in the upper right menu. There you can also find curated lists of featured discoveries and truly weird worlds. 

As you can see, there are so many worlds to discover. Where will you explore?

The post Eyes on Exoplanets Tutorial appeared first on NASA Science.