Mars Archives

November 23, 2023November 23, 2023 by Matt Williams

NASA is Getting the Plutonium it Needs for Future Missions

Close-up of NASA’s Perseverance Mars rover as it looks back at its wheel tracks on March 17, 2022, the 381st Martian day, or sol, of the mission. Credit: NASA

Radioisotope Thermoelectric Generators (RTGs) have a long history of service in space exploration. Since the first was tested in space in 1961, RTGs have gone on to be used by 31 NASA missions, including the Apollo Lunar Surface Experiments Packages (ALSEPs) delivered by the Apollo astronauts to the lunar surface. RTGs have also powered the Viking 1 and 2 missions to Mars, the Ulysses mission to the Sun, Galileo mission to Jupiter, and the Pioneer, Voyager, and New Horizons missions to the outer Solar System – which are currently in (or well on their way to) interstellar space.

In recent years, RTGs have allowed the Curiosity and Perseverance rovers to continue the search for evidence of past (and maybe present) life on Mars. In the coming years, these nuclear batteries will power more astrobiology missions, like the Dragonfly mission that will explore Saturn’s largest moon, Titan. In recent years, there has been concern that NASA was running low on Plutonium-238, the key component for RTGs. Luckily, the U.S. Department of Energy (DOE) recently delivered a large shipment of plutonium oxide, putting it on track to realize its goal of regular production of the radioisotopic material.

November 21, 2023November 21, 2023 by Matt Williams

SpaceX Tested Its Starship Again. Successful Launch But Both Vehicles Were Destroyed

The SN25 Starship and BN9 booster on the landing pad at Boca Chica, Texas. Credit: SpaceX

After months of waiting, SpaceX made its second attempt at an orbital flight this past Saturday (November 18th). During their previous attempt, which occurred back in April, a fully-stacked Starship (SN24) and Super Heavy (BN7) prototypes managed to make it off the landing pad and reach an altitude of about 40 km (25 miles) above sea level. Unfortunately, the SN24 failed to separate from the BN7 booster a few minutes into the flight, causing the vehicle to fall into an uncontrolled tumble and forcing the ground teams to detonate the onboard charges.

Things went better this time as the SN25 and BN9 prototypes took off at about 7:00 AM local time (8:00 AM EDT; 05:00 AM PDT) from the Starbase launch complex. The SN25 successfully separated from its booster two minutes and fifty seconds later – at an altitude of 70 km (43 mi) – and reached an altitude of about 148 kilometers (92 miles), just shy of SpaceX’s goal of 150 km (~93 mi). However, the booster stage was lost about 30 seconds after separation, exploding over the Gulf of Mexico. The SN25 also exploded about eight minutes into the flight, reportedly because its flight termination system was activated.

November 17, 2023November 17, 2023 by Matt Williams

Martian Green Nightglow Seen for the First Time

Artist's impression of the ExoMars Trace Gas orbiter spotting daylight green oxygen at Mars. Credit: ESA

On Earth, there is a phenomenon known as nightglow, where the atmosphere experiences faint light emissions that prevent the night sky from becoming completely dark. This is caused by various processes in the upper atmosphere, like the recombination of atoms, cosmic rays striking the atmosphere, or oxygen and nitrogen interacting with hydroxyl a few hundred kilometers from the surface. Thanks to data obtained by the ESA’s ExoMars Trace Gas Orbiter (TGO), the same phenomenon has been observed in the Martian atmosphere for the first time.

While scientists have long suspected that Mars also experiences this atmospheric phenomenon, this is the first time that effectively proves it. The revelation was made by an international team of scientists based on their analysis of data from the TGO’s Nadir and Occultation for MArs Discovery (NOMAD) spectrometer. When astronauts and rovers explore Mars’ polar regions in the near future, they will see a green glow whenever they look up at the sky and could even use the glow to navigate and find their way in the dark of night.

October 12, 2023October 13, 2023 by Matt Williams

A Comprehensive Blueprint for the Settlement of Mars

Astronauts on Mars will need oxygen. There's oxygen in the atmosphere, but only small amounts. But there's lots of subterranean water on Mars, and that means there's lots of oxygen, too. (Credit: NASA)

Throughout the 20th century, multiple proposals have been made for the crewed exploration of Mars. These include the famed “Mars Project” by Werner von Braun, the “Mars Direct” mission architecture by Robert Zubrin and David Baker, NASA’s Mars Design Reference Mission studies, and SpaceX’s Mars & Beyond plan. By 2033, two space agencies (NASA and the CNSA) plan to commence sending crews and payloads to the Red Planet. These and other space agencies envision building bases there that could eventually lead to permanent settlements and the first “Martians.”

This presents several major challenges, not the least of which have to do with exposure to radiation, extreme temperatures, dust storms, low atmospheric pressure, and lower gravity. However, with the right strategies and technology, these challenges could be turned into opportunities for growth and innovation. In a recent paper, a Leiden University researcher offers a roadmap for a Martian settlement that leverages recent advancements in technology and offers solutions that emphasize sustainability, efficiency, and the well-being of the settlers.

October 3, 2023October 3, 2023 by Matt Williams

Perseverance Watches a Dust Devil Whirl Past

NASA’s Perseverance rover captured this Martian dust devil moving east to west at a clip of about 12 mph (19 kph) along “Thorofare Ridge” on Aug. 30. The video, which was sped up 20 times, is composed of 21 frames taken four seconds apart. It was enhanced in order to show maximal detail. Credit: NASA/JPL-Caltech

On August 30th, 2023, on the 899th Martian day (sol 899) of its mission, NASA’s Perseverance rover spotted a dust devil while exploring the Jezero Crater. The images taken by one of the rover’s Navigation Cameras (NavCams) were used to make a video (shown below), which is composed of 21 frames taken four seconds apart and sped up 20 times. Similar to small, short-lived whirlwinds on Earth, these vertical columns of wind form when pockets of hot air near the surface rise quickly through cooler air above it. By studying them, scientists hope to learn more about Mars’ atmosphere and improve their weather models.

August 28, 2023August 28, 2023 by Laurence Tognetti

Ancient Cracked Mud Found on Mars

A panorama image taken by NASA’s Curiosity Mars rover shows a rock target nicknamed “Pontours” where researchers identified preserved, ancient mud cracks hypothesized to have shaped throughout lengthy cycles of wet and dry environments over many years. These cycles are hypothesized to support conditions where life could form. (Credit: NASA/JPL-Caltech/MSSS/IRAP)

A recent study published in Nature examines how mud cracks observed on Mars by NASA’s Curiosity rover could provide insight into how life on the Red Planet could have formed in its ancient past. On Earth, mud cracks have traditionally been linked to cycles of wet and dry environments that assisted in developing the complex processes responsible for microbial life to take hold. This study was conducted by an international team of researchers and holds the potential to help scientists better understand the geological and chemical processes that might have existed in Mars’ ancient past, up to billions of years ago.

August 24, 2023August 24, 2023 by Nancy Atkinson

Over 100 Million Years Ago, Olympus Mons Had a Massive Landslide

This image from ESA’s Mars Express shows the wrinkled surroundings of Olympus Mons, the largest volcano not only on Mars but in the Solar System. This feature, created by previous landslides and lava-driven rockfalls, is named Lycus Sulci. Credit: ESA/DLR/FU Berlin.

While the surface of Mars looks relatively unchanging now, it wasn’t always so. The tallest mountain in the Solar System is Olympus Mons, a giant shield volcano on Mars that reaches 21.9 km (13.6 miles) high, 2.5 times higher than Mount Everest here on Earth. Ancient lava flows surround the volcanic caldera, evidence of an active time.

New images from ESA’s Mars Express show how these lava flows created extremely sharp cliffs, as high as 7 km (4.3 miles) in some areas, which suddenly collapsed in mind-boggling landslides. One of these landslides occurred several 100 million years ago when a chunk of the volcano broke off and spread across the surrounding plains. If we could look back in time and see as it happened, it was certainly a very dramatic and turbulent epoch on Mars.

August 17, 2023August 17, 2023 by Matt Williams

This Sure Looks Like the Movements of a Glacier Across Ancient Mars

HiRISE image showing rough terrain possibly shaped by ancient glaciers. Credit: NASA/JPL-Caltech/UArizona

It is a scientific certainty that Mars was once a much different place, with a denser atmosphere, warmer temperatures, and where water once flowed. Evidence of this past is preserved in countless surface features, ranging from river channels and alluvial deposits to lakebeds. However, roughly 4 billion years ago, the planet began to change into what we see today, an extremely cold and desiccated environment. Between all that, it is possible Mars experienced glacial and interglacial periods, which is evidenced by images like the one taken by the NASA Mars Reconnaissance Orbiter (MRO) shown above.

August 9, 2023August 9, 2023 by Laurence Tognetti

Interpreting Dune Patterns: Insights from Earth and Mars

Examples of active dune fields within Nili Patera on Mars. Dunes like these were examined for this study in hopes of giving scientists better insights into how their interactions are influenced by a planet’s climate. (Credit: NASA/JPL-Caltech/Univ. of Arizona)

A recent study published in the journal Geology attempts to interpret the patterns of dunes, which are sand mounds frequently formed by aeolian (wind) processes and range in size from small ripples observed on beaches to massive structures observed in the desert. Specifically, the researchers focused on patterns of dune crestlines, which are the top of the dunes. Different dune crestline patterns might appear as mundane features, but their formations are often the result of a myriad of influences, including climate change, surface processes, and atmospheric phenomena.

August 8, 2023August 8, 2023 by Nancy Atkinson

NASA's Mars Helicopter Had an Unscheduled Landing, But Flew Again

This view of NASA’s Ingenuity Mars Helicopter was generated using data collected by the Mastcam-Z instrument aboard the agency’s Perseverance Mars rover on Aug. 2, 2023, the 871st Martian day, or sol, of the mission, one day before the rotorcraft’s 54th flight. Credit: NASA/JPL-Caltech/ASU/MSSS

The Ingenuity helicopter continues to explore the landscape around Jezero Crater on Mars, now more than 800 days into its original 30-day demonstration mission. Recently, Ingenuity completed its 54th flight on the Red Planet. However, things haven’t gone exactly to plan the past several weeks.

On its 53^rd fight on July 22, 2023, the helicopter cut the flight short after one of its warnings was triggered, implementing the “LAND_NOW” protocol. Ingenuity should have flown for 136 seconds but was only in the air for 74 seconds before performing an emergency landing.