2024 Total Solar Eclipse: Prediction vs. Reality

Before a total solar eclipse crossed North America on April 8, 2024, scientists at Predictive Science Inc. of San Diego aimed to foresee what the Sun’s outer atmosphere, the corona, would look like during totality.

The predictions help researchers understand the accuracy of their models of the Sun’s corona, which extends along its magnetic field. A solar eclipse offers a rare opportunity to view the entire corona from Earth, guiding research into how its energy can cause solar flares and coronal mass ejections, which can disrupt technology on Earth and in space.

The researchers used the Aitken, Electra, and Pleiades supercomputers at the NASA Advanced Supercomputing facility, located at the agency’s Ames Research Center in California’s Silicon Valley. With near-real-time data from NASA’s Solar Dynamics Observatory and ESA’s (the European Space Agency) and NASA’s Solar Orbiter, they created a dynamic model of the corona. The team’s model accurately predicted several details, including long streamers in the upper and lower left side of the image, but the streamers’ locations are slightly misaligned when compared with real images. This is likely because some new activity on the far side of the Sun, which affected the appearance of the corona, wasn’t yet seen and couldn’t be incorporated in the model. Once it was, the model more closely matched observational photos of the corona.

Recognizing that the corona is inherently complex and difficult to predict during solar maximum, Cooper Downs, a research scientist at Predictive Science, said, “We’re really thrilled with this simulation. It really has a lot of scientific consequences that I think we’ll be exploring for a long time.”

By Rachel Lense, NASA’s Goddard Space Flight Center, Greenbelt, Md;
with Tara Friesen, NASA’s Ames Research Center, Silicon Valley, Calif.

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Researchers Develop ‘Founding Document’ on Synthetic Cell Development

Cells are the fundamental units of life, forming the variety of all living things on Earth as individual cells and multi-cellular organisms. To better understand how cells perform the essential functions of life, scientists have begun developing synthetic cells – non-living bits of cellular biochemistry wrapped in a membrane that mimic specific biological processes.

The development of synthetic cells could one day hold the answers to developing new ways to fight disease, supporting long-duration human spaceflight, and better understanding the origins of life on Earth.

In a paper published recently in ACS Synthetic Biology, researchers outline the potential opportunities that synthetic cell development could unlock and what challenges lie ahead in this groundbreaking research. They also present a roadmap to inspire and guide innovation in this intriguing field.

“The potential for this field is incredible,” said Lynn Rothschild, the lead author of the paper and an astrobiologist at NASA’s Ames Research Center in California’s Silicon Valley. “It’s a privilege to have led this group in forming what we envision will be a founding document, a resource that will spur this field on.”

Synthetic cell development could have wide ranging benefits to humanity. Analyzing the intricacies that go in to building a cell could guide researchers to better understand how cells first evolved or open the door to creating new forms of life more capable of withstanding harsh environments like radiation or freezing temperatures.

These innovations could also lead to advancements in food and medical sciences – creating efficiencies in food production, detecting contaminants in manufacturing, or developing novel cellular functions that act as new therapies for chronic diseases and even synthetic organ transplantation.

Building synthetic cells could also answer some of NASA’s biggest questions about the possibility of life beyond Earth.

“The challenge of creating synthetic cells informs whether we’re alone in the universe,” said Rothschild. “We’re starting to develop the skills to not just create synthetic analogs of life as it may have happened on Earth but to consider pathways to life that could form on other planets.”

As research continues on synthetic cell development, Rothschild sees opportunities where it could expand our understanding of the complexities of natural life.

“Life is an amazing thing. We use the capabilities of cells all the time – we build houses with wood, we use leather in our shoes, we breathe oxygen. Life has amazing precision, and if you can harness it, it’s unbelievable what we could accomplish.”

For news media:

Members of the news media interested in covering this topic should reach out to the NASA Ames newsroom.

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Hi-C Rocket Experiment Achieves Never-Before-Seen Look at Solar Flares

By Jessica Barnett 

After months of preparation and years since its last flight, the upgraded High Resolution Coronal Imager Flare mission – Hi-C Flare, for short – took to the skies for a never-before-seen view of a solar flare.

The low-noise cameras – built at NASA’s Marshall Space Flight Center in Huntsville, Alabama – are part of a suite of state-of-the-art instruments on board the Black Brant IX sounding rocket that launched April 17 from Poker Flat Research Range in Alaska. Using the new technology, investigators hoped to study the extreme energies involved with solar flares. The Hi-C Flare experiment mission was led by Marshall.

“This is a pioneering campaign,” said Sabrina Savage, principal investigator at Marshall for Hi-C Flare. “Launching sounding rockets to observe the Sun to test new technologies optimized for flare observations has not even been an option until now.”

It was the third iteration of the Hi-C instrument to take flight, but its first flight with ride along instruments, including the COOL-AID (Coronal OverLapagram – Ancillary Imaging Diagnostics), CAPRI-SUN (high-CAdence low-energy Passband x-Ray detector with Integrated full-SUN field of view), and SSAXI (Swift Solar Activity X-ray Imager). Following a month of payload integration and testing in White Sands, New Mexico, investigators completed final launch site integration at the Poker Flat Research Range in Alaska.

Each morning of the two-week launch campaign window, the team spent about five hours preparing the experiment for launch, followed by up to four hours of monitoring solar data for a flare that registers as C5-class or higher with duration longer than the rocket flight. The launch finally occurred on the penultimate day of the campaign window.

“The Sun was unusually quiet throughout the campaign despite numerous active regions,” said Savage. “Both teams were getting nervous that we would not launch, but we finally got a nice long-duration M-class flare right before the window closed.”

The Hi-C Flare mission launched at 2:14 p.m. AKDT, just one minute after the FOXSI-4 (Focusing Optics X-ray Solar Imager) mission led by the University of Minnesota. Once in air, sensors on the Hi-C Flare rocket pointed cameras toward the Sun and stabilized instrumentation. Then, a shutter door opened to allow the cameras to gather about five minutes of data before the door closed and the rocket fell back to Earth.

The rocket landed in the Alaskan tundra, where it remained until conditions were safe enough for the team to retrieve it and begin processing the collected data.

“For launches into the tundra, we have to wait a few days for the instrument to get back to us and then to be dried out enough to turn on,” said Savage. “It was an anxious few days, but the data are beautiful and were worth the wait.”

Investigators weren’t just testing new technology, either. They also used a new algorithm to predict the behavior of a solar flare, allowing them to launch the rocket at the ideal time.

“To catch a flare in action is really hard, because you can’t predict them,” said Genevieve Vigil, technical and camera lead for Hi-C 3 and COOL-AID at Marshall. “We had to wait around for a solar flare to start going, then launch as it’s happening. No one has tried to do that before.”

Fortunately, their method was a success.

“We are still processing the data from all four instruments, but the data from Hi-C 3 and COOL-AID already look fantastic,” said Savage.

“The COOL-AID data is the first spectrally pure image in a hot spectral line that we know of,” said Amy Winebarger, project scientist at Marshall for Hi-C Flare.

The Hi-C experiment is led by Marshall Space Flight Center in partnership with the Smithsonian Astrophysical Observatory in Cambridge, Massachusetts, and Montana State University in Bozeman, Montana. Launch support is provided at Poker Flat Research Range in Alaska by NASA’s Sounding Rocket Program at the agency’s Wallops Flight Facility on Wallops Island, Virginia, which is managed by NASA’s Goddard Space Flight Center in Greenbelt, Maryland. NASA’s Heliophysics Division manages the sounding-rocket program for the agency.

Jonathan Deal 
Marshall Space Flight Center, Huntsville, Ala. 
256.544.0034  
Jonathan.e.deal@nasa.gov 

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Galaxy Evolution Explorer Searches for Light

This Dec. 21, 2002, artist’s concept of NASA’s Galaxy Evolution Explorer imagines what the space telescope would look like during its mission. Launched April 28, 2003, it studied the shape, brightness, size and distance of galaxies across 10 billion years of cosmic history. By observing ultraviolet wavelengths, the telescope measured the history of star formation in the universe.

This space telescope allowed astronomers to uncover mysteries about the early universe and how it evolved, as well as better characterize phenomena like black holes and dark matter. The mission was extended three times over a period of 10 years before it was decommissioned in June 2013.

Image Credit: NASA/JPL-Caltech

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Sols 4173-4174: Reflections

Earth planning date: Wednesday, May 1, 2024

Today’s planning was a little out of the ordinary. Not in terms of the plan itself, Curiosity’s team built an exciting plan utilizing much of its science toolkit. Today’s plan was unusual rather due to my role as APXS PUDL Reverse Shadow (PUDL = Payload Uplink/Downlink Lead). While I normally staff the APXS PUDL role, the person on-shift responsible for APXS downlink assessment and uplink planning, operating as a “Reverse Shadow” meant I took a backseat to another APXS team member who was completing the final phases of their training for the role. They handled their duties with great aplomb, leaving me to reflect on my first few shifts in the same role.

As I’m typing this, given how long it has been since that time, I can’t shake the comedy of narrating this section of the blog in the distinct and rapid-paced tone of 1940s or 1950s radio and TV. It was around a month after landing, September 10th 2012, to be specific. I was on shift for the first time as APXS PUDL and was not expecting much in the way of workload given the notional plan. Curiosity, on the other hand, had a different idea. As event logs of the sol prior were received, the intended plan was scrapped and there was an opportunity to propose an activity. My mentor at the time encouraged my input. We were conducting operations at JPL then and walked down the hall to present our request to other members of the team before the sol’s uplink planning meetings officially kicked off (I am correcting myself here as I originally typed “days” instead of “sols” but Mars time meant shifts at this time occurred throughout the night in California). The proposal was accepted, and the proposed activity ultimately went according to plan. I can remember driving back to my hotel as the sun was coming up. It was then that it hit me: I had just influenced something that happened on another planet. It was a very surreal experience. What I didn’t realize then, however, was how important these data acquired on my first shift as lead APXS PUDL would be, given they now serve as a baseline from which we assess APXS performance vs. temperature over time.

Today’s APXS PUDL had a more typical experience. There are two APXS targets in the plan: “Emerald Peak” and “Franklin Lakes.” These targets are both on the same block (the rectangular one just slightly left and above the middle of this blog’s image), with Emerald Peak targeting the visibly altered rim near the lower portion of the block and Franklin Lakes more centrally located. MAHLI will acquire images of both of these targets, including a three-position rotational stereo set on Emerald Peak. A number of other targets were captured by ChemCam and/or Mastcam, including “Grizzly Falls,” “Liberty Cap,” “Pavilion Dome,” “Triple Divide Peak,” and “Haystack Peak.” As Curiosity is not driving in this plan, ChemCam and Mastcam are also used for targeted observations on the second sol, focusing primarily on “The Minarets” and “Pinnacle Ridge,” alongside long-distance observations of “Kukenan.” DAN observations as well as a number of environmental monitoring activities by REMS, Navcam, and Mastcam round out the two-sol plan.

Written by Scott VanBommel, Planetary Scientist at Washington University

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