What’s more, replacing any form of potatoes with whole grains was associated with a lower type 2 diabetes risk, but swapping them for white rice was linked to an increased risk, the results show.

Potatoes contain several nutrients including fiber, vitamin C, and magnesium, but they also have a high starch content and therefore a high glycemic index, so have been linked to a higher risk of developing type 2 diabetes.

But neither the preparation method for potatoes nor specific foods that potatoes would replace have been considered, both of which are key to evaluating the overall health impact of potatoes.

To address this, researchers investigated the association between intake of potatoes prepared by different methods (boiled, baked, or mashed versus French fries) and risk of type 2 diabetes. They also looked at the impact on health of replacing potatoes with other major carbohydrates, such as whole grains and rice.

Their findings are based on more than 205,000 health professionals from three large US studies carried out between 1984 and 2021. Participants were free of diabetes, heart disease or cancer and completed detailed food questionnaires every four years.

During almost 40 years of follow up, 22,299 people were diagnosed with type 2 diabetes.

After adjusting for lifestyle and dietary factors related to diabetes risk, the researchers found that for every three weekly servings of total potato, the rate of type 2 diabetes increased by 5% and for every three weekly servings of French fries, the rate increased by 20%. However, similar intake of baked, boiled, or mashed potatoes was not associated with a significantly increased risk.

Replacing three weekly servings of total potato with whole grains lowered the type 2 diabetes rate by 8%. Substituting baked, boiled, or mashed potatoes with whole grains lowered the rate by 4%, and replacing French fries lowered the rate by 19%.

In contrast, replacing total potatoes or baked, boiled, or mashed potatoes with white rice was associated with an increased risk of type 2 diabetes.

This is an observational study so no firm conclusions can be drawn about cause and effect and the researchers can’t rule out the possibility that other unmeasured factors may have influenced their results. Most participants were also health professionals of European ancestry, so findings may not apply to other populations.

Nevertheless, they conclude: “Our findings underscore that the association between potato intake and type 2 diabetes risk depends on the specific foods used as replacement. The findings also align with current dietary recommendations that promote the inclusion of whole grains as part of a healthy diet for the prevention of type 2 diabetes.”

So, are potatoes back on the plate? Well, it depends, say researchers in a linked editorial, who note that it is important to consider preparation method and replacement food when guiding the public or informing policy.

They point out that with their relatively low environmental impact and their health impact, baked, boiled, or mashed potatoes can be part of a healthy and sustainable diet, though whole grains should remain a priority, but say future studies from more diverse populations that account for both preparation methods and substitution analysis are needed.

The Large Magellanic Cloud is the largest of the dozens of small satellite galaxies that orbit the Milky Way. The Tarantula Nebula is the largest and brightest star-forming region not just in the Large Magellanic Cloud, but in the entire group of nearby galaxies to which the Milky Way belongs.

The Tarantula Nebula is home to the most massive stars known, some of which are roughly 200 times as massive as our Sun. The scene pictured here is located away from the centre of the nebula, where there is a super star cluster called R136, but very close to a rare type of star called a Wolf-Rayet star. Wolf-Rayet stars are massive stars that have lost their outer shell of hydrogen and are extremely hot and luminous, powering dense and furious stellar winds.

This nebula is a frequent target for Hubble, whose multiwavelength capabilities are critical for capturing sculptural details in the nebula’s dusty clouds. The data used to create this image come from an observing program called Scylla, named for a multi-headed sea monster from the Greek myth of Ulysses. The Scylla program was designed to complement another Hubble observing program called ULLYSSES (Ultraviolet Legacy Library of Young Stars as Essential Standards). ULLYSSES targets massive young stars in the Small and Large Magellanic Clouds, while Scylla investigates the structures of gas and dust that surround these stars.

NASA’s Lunar Trailblazer ended its mission to the Moon on July 31. Despite extensive efforts, mission operators were unable to establish two-way communications after losing contact with the spacecraft the day following its Feb. 26 launch.

The mission aimed to produce high-resolution maps of water on the Moon’s surface and determine what form the water is in, how much is there, and how it changes over time. The maps would have supported future robotic and human exploration of the Moon as well as commercial interests while also contributing to the understanding of water cycles on airless bodies throughout the solar system.

Lunar Trailblazer shared a ride on the second Intuitive Machines robotic lunar lander mission, IM-2, which lifted off at 7:16 p.m. EST on Feb. 26 aboard a SpaceX Falcon 9 rocket from the agency’s Kennedy Space Center in Florida. The small satellite separated as planned from the rocket about 48 minutes after launch to begin its flight to the Moon. Mission operators at Caltech’s IPAC in Pasadena established communications with the small spacecraft at 8:13 p.m. EST. Contact was lost the next day.

Without two-way communications, the team was unable to fully diagnose the spacecraft or perform the thruster operations needed to keep Lunar Trailblazer on its flight path.

“At NASA, we undertake high-risk, high-reward missions like Lunar Trailblazer to find revolutionary ways of doing new science,” said Nicky Fox, associate administrator, Science Mission Directorate at NASA Headquarters in Washington. “While it was not the outcome we had hoped for, mission experiences like Lunar Trailblazer help us to learn and reduce the risk for future, low-cost small satellites to do innovative science as we prepare for a sustained human presence on the Moon. Thank you to the Lunar Trailblazer team for their dedication in working on and learning from this mission through to the end.”

The limited data the mission team had received from Lunar Trailblazer indicated that the spacecraft’s solar arrays were not properly oriented toward the Sun, which caused its batteries to become depleted.

For several months, collaborating organizations around the world — many of which volunteered their assistance — listened for the spacecraft’s radio signal and tracked its position. Ground radar and optical observations indicated that Lunar Trailblazer was in a slow spin as it headed farther into deep space.

“As Lunar Trailblazer drifted far beyond the Moon, our models showed that the solar panels might receive more sunlight, perhaps charging the spacecraft’s batteries to a point it could turn on its radio,” said Andrew Klesh, Lunar Trailblazer’s project systems engineer at NASA’s Jet Propulsion Laboratory in Southern California. “The global community’s support helped us better understand the spacecraft’s spin, pointing, and trajectory. In space exploration, collaboration is critical — this gave us the best chance to try to regain contact.”

However, as time passed, Lunar Trailblazer became too distant to recover as its telecommunications signals would have been too weak for the mission to receive telemetry and to command.

Technological Legacy

The small satellite’s High-resolution Volatiles and Minerals Moon Mapper (HVM3) imaging spectrometer was built by JPL to detect and map the locations of water and minerals. The mission’s Lunar Thermal Mapper (LTM) instrument was built by the University of Oxford in the United Kingdom and funded by the UK Space Agency to gather temperature data and determine the composition of silicate rocks and soils to improve understanding of why water content varies over time.

“We’re immensely disappointed that our spacecraft didn’t get to the Moon, but the two science instruments we developed, like the teams we brought together, are world class,” said Bethany Ehlmann, the mission’s principal investigator at Caltech. “This collective knowledge and the technology developed will cross-pollinate to other projects as the planetary science community continues work to better understand the Moon’s water.”

Some of that technology will live on in the JPL-built Ultra Compact Imaging Spectrometer for the Moon (UCIS-Moon) instrument that NASA recently selected for a future orbital flight opportunity. The instrument, which has has an identical spectrometer design as HVM3, will provide the Moon’s highest spatial resolution data of surface lunar water and minerals.

More About Lunar Trailblazer

Lunar Trailblazer was selected by NASA’s SIMPLEx (Small Innovative Missions for Planetary Exploration) competition, which provides opportunities for low-cost science spacecraft to ride-share with selected primary missions. To maintain the lower overall cost, SIMPLEx missions have a higher risk posture and less-stringent requirements for oversight and management. This higher risk acceptance bolsters NASA’s portfolio of targeted science missions designed to test pioneering mission approaches.

Caltech, which manages JPL for NASA, led Lunar Trailblazer’s science investigation, and Caltech’s IPAC led mission operations, which included planning, scheduling, and sequencing of all spacecraft activities. Along with managing Lunar Trailblazer, NASA JPL provided system engineering, mission assurance, the HVM3 instrument, and mission design and navigation. Lockheed Martin Space provided the spacecraft, integrated the flight system, and supported operations under contract with Caltech. The University of Oxford developed and provided the LTM instrument, funded by the UK Space Agency. Lunar Trailblazer, a project of NASA’s Lunar Discovery and Exploration Program, was managed by NASA’s Planetary Missions Program Office at Marshall Space Flight Center in Huntsville, Alabama, for the agency’s Science Mission Directorate in Washington.