Studying Pneumonia in Space for Heart Health on Earth

Expedition 74 astronauts aboard the International Space Station are uncovering how bacteria that causes pneumonia can lead to long-term damage in the heart. Researchers are leveraging the space environment to observe how stem cell derived heart tissues respond to bacterial infections, to discover new methods to manage cardiovascular health and infectious diseases.

In space, bacteria tend to be more severe and have enhanced drug resistance. Scientists are harnessing these traits to exaggerate their effect on heart cells and reveal important cellular responses that would be difficult to detect on Earth. Pinpointing the factors that make bacterial infections more severe in space could reveal targets for treatment. Dr. Palaniappan Sethu, professor of Medicine and Biomedical Engineering at the University of Alabama at Birmingham says, “By exacerbating the infection, we anticipate clear separation of the infection and control groups, making it easier to identify subtle factors that promote bacterial virulence”.

The Streptococcus pneumoniae bacteria is the leading cause of community-acquired pneumonia (CAP), an infection which causes millions of deaths each year. More than a quarter of adults hospitalized for CAP develop heart disease and patients that survive severe cases have an increased risk even after the pneumonia has been fully eradicated.

This research is also important as humans venture further into space. For over 25 years, researchers have utilized the space station to study how the human body and microbes respond to space, and deep space missions will require the strategies and knowledge we gain. “Addressing these questions is essential for ensuring human health during long duration space travel and for enabling sustainable habitation beyond Earth. Our experiments are expected to generate new insights into how space specific factors influence disease progression”, says Dr. Carlos J. Orihuela, professor of Microbiology at the University of Alabama at Birmingham.

The space station allows researchers from around the world to address complex human health problems on Earth and in space. Using the unique environmental factors aboard the space station allows for advanced study of disease formation, testing drugs and diagnostic tools, and more.

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Christian M. Getteau

NASA’s Planet-Hunting TESS Reveals Dazzling Night Sky

NASA’s TESS (Transiting Exoplanet Survey Satellite) has released its most complete view of the starry sky to date, filling in gaps from previous observations. Nearly 6,000 colored dots scattered across the image show the locations of either confirmed or candidate exoplanets — worlds beyond our solar system — identified by the mission as of September 2025 at the end of TESS’s second extended mission.

“Over the last eight years, TESS has become a fire hose of exoplanet science,” said Rebekah Hounsell, a TESS associate project scientist at the University of Maryland Baltimore County and NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “It’s helped us find planets of all different sizes, from tiny Mercury-like ones to those larger than Jupiter. Some of them are even in the habitable zone, where liquid water might be possible on the surface, an important factor in our search for life beyond Earth.”

The TESS mission scans a wide swath of the sky, called a sector, for about a month at a time using its four cameras. These long stares allow the spacecraft to track the brightness changes of tens of thousands of stars, looking for variations in their light that might come from orbiting planets.

Researchers assembled an all-sky mosaic made of 96 sectors observed between April 2018, when TESS began its work, and September 2025.

The blue dots in the image mark the locations of nearly 700 confirmed planets, as of September 9. This menagerie includes worlds that may be covered by volcanoes, are being destroyed by their stars, or orbit two stars — experiencing double sunrises and sunsets each day. The orange dots represent more than 5,000 candidate planets that are awaiting verification.

To date, scientists have confirmed over 6,270 exoplanets using missions like TESS, NASA’s retired Kepler Space Telescope, and other facilities.

Also captured in the mosaic is the bright plane of our Milky Way galaxy, seen as a glowing arc through the center. The bright white ovals in the lower left are the Large and Small Magellanic Clouds. These satellite galaxies are located 160,000 and 200,000 light-years away, respectively.

“The more we dig into the large TESS dataset, especially using automated algorithms, the more surprises we find,” said Allison Youngblood, the TESS project scientist at NASA Goddard. “In addition to planets, TESS has helped us study rivers of young stars, observe dynamic galactic behavior, and monitor asteroids near Earth. As TESS fills in more of the night sky, there’s no knowing what it might see next.”

You could discover the next exoplanet! Join the Planet Hunters TESS citizen science project, and you’ll learn how to read light curves — plots of light data from distant stars — to find telltale signals from orbiting exoplanets.

By Jeanette Kazmierczak
NASA’s Goddard Space Flight Center, Greenbelt, Md.

Media Contact:
Claire Andreoli
301-286-1940
NASA’s Goddard Space Flight Center, Greenbelt, Md.

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America’s Emerald Isle

In a process that played out over thousands of years, a retreating ice sheet carved, scoured, and shaped the landscape of the present-day Great Lakes. In northern Lake Michigan, this sculpting left distinct ridges and valleys running north-to-south along the lake floor. Some parts of those ridges, made of erosion-resistant rock, have remained above the waves of the big lake, forming the Beaver Archipelago.

The OLI (Operational Land Imager) on Landsat 9 captured this image of several of the archipelago’s islands on August 2, 2024. These patches of land contain upland forests, dunes, wetlands, and marshes—habitats that support rare plant and bird species and provide spawning grounds for fish. The bright, sandy perimeters of the islands are surrounded by shallow, turquoise waters and deeper, dark blue areas, where depths reach up to about 330 feet (100 meters).

This image centers on Beaver Island, the largest island in Lake Michigan at 13 miles (21 kilometers) long and 6 miles (10 kilometers) wide. It is also the only inhabited island of the Beaver Archipelago, and many of its approximately 600 residents are of Irish descent. In the mid-1800s, scores of immigrants from County Donegal, Ireland, and Irish fishermen from nearby islands and ports in Michigan settled on the island, which subsequently took on the moniker of “America’s Emerald Isle.”

The farming and fishing, in particular, were productive for the new arrivals. In the 1880s, Beaver Island became the largest supplier of freshwater fish in the United States. Due to overfishing, however, such abundance would be short-lived.

Ship traffic on the Great Lakes was also increasing during this time. Two lighthouses were constructed on the island to help the growing number of vessels traveling between Chicago and the Straits of Mackinac. The Beaver Head Lighthouse operated from 1852 to 1962 on the southern end of the island. On the northern side, the Beaver Island Harbor Light, pictured below, was first lit in 1870 and remains an active beacon more than 150 years later.

Today, people travel to Beaver Island by boat or plane to explore its history and enjoy activities such as biking, fishing, and kayaking. The island’s remote location and minimal light pollution led to the establishment of the Beaver Island State Wildlife Research Area International Dark Sky Sanctuary in 2024. Sky gazers may be drawn to the sanctuary for a chance to glimpse the aurora borealis and other celestial phenomena.

Neighboring islands in the archipelago are more difficult to access and have remained relatively undisturbed. Perched, or cliff-top, sand dunes are found up to 200 feet (60 meters) above the lake level on the western side of High Island. Unique plant species, including the Pitcher’s thistle and Lake Huron tansy, grow in the island’s dunes. On Hog Island, patches of old-growth northern hardwood forest remain. Wetland communities known as Great Lakes marshes along the shoreline provide spawning grounds for perch and smallmouth bass.

NASA Earth Observatory image by Wanmei Liang, using Landsat data from the U.S. Geological Survey. Photo by Kelcie Herald/Unsplash. Story by Lindsey Doermann.

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August 2, 2024

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References & Resources

• Beaver Island Historical Society, Beaver Island Historical Society Welcomes You to Our Past. Accessed May 12, 2026.
• DarkSky International (2024, April 8) Beaver Island State Wildlife Research Area. Accessed May 12, 2026.
• NASA Earth Observatory (2013, August 24) Garden and Hog Islands, Michigan. Accessed May 12, 2026.
• NOAA National Centers for Environmental Information, Lake Michigan Geomorphology. Accessed May 12, 2026.
• Northern Michigan History, Beaver Island History: From Ancient Circles to Irish Settlers. Accessed May 12, 2026.
• Wisconsin Sea Grant, The formation of the Great Lakes. Accessed May 12, 2026.

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