{"id":483956,"date":"2026-06-05T05:14:11","date_gmt":"2026-06-05T05:14:11","guid":{"rendered":"https:\/\/www.newsbeep.com\/ie\/483956\/"},"modified":"2026-06-05T05:14:11","modified_gmt":"2026-06-05T05:14:11","slug":"nasas-roman-telescope-will-search-100-million-stars-for-new-worlds","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/ie\/483956\/","title":{"rendered":"NASA\u2019s Roman Telescope Will Search 100 Million Stars for New Worlds"},"content":{"rendered":"

\"Milky<\/a>This infographic features artist\u2019s concept views of our Milky Way galaxy: face-on at the left and edge-on at the right. It highlights different galactic environments that could influence the development of planets and potentially life. The center of the galaxy is rich in the elements that form planets (like silicon, oxygen, and magnesium), which are forged by multiple generations of stars and supernova explosions. Planets there may be more common or larger, but they would also be flooded with radiation from densely packed stars (including massive ones that emit enormous amounts of high-energy ultraviolet light and X-rays). In the outskirts of the galaxy, where stars are much more spread out, radiation is far milder but there are also smaller amounts of planet-building materials. Nestled in between these regions is the galactic habitable zone, a happy medium where radiation levels and planet-forming elements balance out, increasing the likelihood of worlds that could support life. Credit: NASA\u2019s Goddard Space Flight Center<\/p>\n

NASA\u2019s Roman Telescope could reveal 100,000 hidden worlds and rewrite what we know about planets across the Milky Way.<\/p>\n

NASA\u2019s Nancy Grace Roman Space Telescope is expected to dramatically expand humanity\u2019s catalog of worlds beyond our solar system<\/a>. Known as exoplanets, these distant planets number nearly 6,300 discoveries so far through NASA missions and other observatories. Scientists estimate Roman could add around 100,000 more to that total.<\/p>\n

What makes the mission especially exciting is where it will look. Most of the planets Roman discovers are expected to be located in regions of the Milky Way that have received little attention from previous exoplanet surveys.<\/p>\n

\u201cOur galaxy is home to a variety of different environments, but when it comes to hunting for exoplanets, we\u2019ve really only explored one: our own neighborhood,\u201d said Elisa Quintana, an exoplanet researcher at NASA\u2019s Goddard Space Flight Center in Greenbelt, Maryland. Quintana leads a team focused on building software and simulations to help prepare for Roman\u2019s exoplanet transit observations. \u201cRoman will extend the search far enough to encompass other galactic habitats, which could help us learn how planet formation varies across different regions of the Milky Way.\u201d<\/p>\n

Most known exoplanets orbit stars within a few thousand light-years of Earth. Roman, however, will look much farther. One of the telescope\u2019s primary surveys will examine stars throughout the Milky Way\u2019s densely packed central bulge and continue all the way toward the outer reaches of the galaxy\u2019s far side.<\/p>\n

\"Roman<\/a>This artist\u2019s concept shows the region of the Milky Way Roman\u2019s Galactic Bulge Time-Domain Survey will cover. The higher density of stars in this direction will yield more than 50,000 microlensing events, which will reveal planets, black holes, neutron stars, trans-Neptunian objects, and enable exciting stellar science. The survey will also cover relatively uncharted territory when it comes to planet-finding. That\u2019s important because the way planets form and evolve may be different depending on where in the galaxy they\u2019re located. Our solar system is situated near the outskirts of the Milky Way, about halfway out on one of the galaxy\u2019s spiral arms. A Kepler Space Telescope study showed that stars on the fringes of the Milky Way possess fewer of the most common planet types that have been detected so far. Roman will search in the opposite direction, toward the center of the galaxy, and could find differences in that galactic neighborhood, too. Credit: NASA\u2019s Goddard Space Flight Center\/CI LabSearching the Galaxy for New Worlds<\/p>\n

Roman will monitor millions of stars and watch for changes in their brightness.<\/p>\n

One technique involves detecting slight dips in starlight when a planet passes in front of its host star. These events are known as transits. Another approach relies on a phenomenon called microlensing, in which the gravity of a star and its planets briefly magnifies the light from a more distant star, making it appear brighter.<\/p>\n

Each method is particularly effective at finding different kinds of planets.<\/p>\n

Using the transit method, Roman is expected to discover around 100,000 planets. This technique works especially well for large, extremely hot planets because they block more starlight and cross in front of their stars more often.<\/p>\n

Microlensing is expected to uncover more than 1,000 additional planets. It is particularly useful for finding worlds that orbit farther from their stars, including planets with arrangements more similar to those found in our own solar system. Because microlensing can separate a planet\u2019s gravitational influence from that of its host star, it can detect worlds as small as Earth or Mars.<\/p>\n

The technique can also find planets within a star\u2019s habitable zone and even farther out. Many of these distant worlds are nearly impossible to detect using other methods and remain largely unexplored beyond our solar system.<\/p>\n

Together, the transit and microlensing surveys will provide a broader view of how planets form and evolve throughout the Milky Way, including in the region where our own solar system may have originated.<\/p>\n

\"Exoplanet<\/a>This plot shows currently known exoplanets, with different categories highlighted. Roman will help fill in the bottom-right of the plot by finding small worlds in large orbits. Credit: NASA\u2019s Goddard Space Flight CenterExploring Earth\u2019s Cosmic Origins<\/p>\n

Today, the solar system sits about 27,000 light-years from the center of the Milky Way. Scientists believe it formed roughly 10,000 light-years closer to the galactic center before gradually moving outward to its current location.<\/p>\n

Evidence for that migration comes largely from the Sun\u2019s chemical composition.<\/p>\n

Astronomers refer to all elements heavier than hydrogen and helium as heavy elements. Hydrogen and helium formed shortly after the birth of the universe, while heavier elements were created inside stars. As generations of stars live and die, these heavier elements become more abundant.<\/p>\n

Stars located in the outer parts of the Milky Way generally contain fewer heavy elements. By contrast, stars in the galactic bulge tend to be older and richer in elements such as silicon, oxygen, and magnesium.<\/p>\n

Those chemical differences may have a major impact on the planets that form around those stars. Some planetary systems may produce larger planets, rockier worlds, or different numbers of planets altogether.<\/p>\n

Astronomers have already found evidence that stellar composition influences planet formation.<\/p>\n

\u201cStars with more heavy elements tend to host more planets, especially giant ones,\u201d said Robby Wilson, a postdoctoral fellow at NASA Goddard, who led a study<\/a> about Roman\u2019s expected transiting planet yield.<\/p>\n

By examining entirely different populations of stars and planets, Roman could significantly deepen scientists\u2019 understanding of how common planetary systems like our own are throughout the galaxy.<\/p>\n

\u201cRoman will be especially powerful because it will observe hundreds of millions of distant stars, letting scientists compare faraway planet populations to those found nearby,\u201d said Wilson. \u201cAll of that data will give us a lot to comb through, so we\u2019re prepping by creating synthetic data, detecting simulated planets, and using machine learning to filter out false positives. That way we\u2019ll be ready to go right away when real data comes pouring in.\u201d<\/p>\n

All data collected by Roman will be publicly available, allowing professional astronomers and citizen scientists alike to participate in the search for new worlds.<\/p>\n

\"CoRoT-2A<\/a>This artist\u2019s concept visualizes a hot Jupiter \u2014 a Jupiter-size world orbiting extremely close to its host star. Credit: NASA\/Ames\/JPL-CaltechStudying Alien Weather and Atmospheres<\/p>\n

Beyond discovering planets, Roman may also provide information about the atmospheres of several thousand transiting worlds.<\/p>\n

\u201cRoman won\u2019t analyze atmospheres in the same in-depth way as missions like NASA\u2019s James Webb Space Telescope, but it will gather different information on a much larger scale,\u201d Wilson said.<\/p>\n

While telescopes such as Webb focus on detailed chemical studies of individual planets, Roman will look at broader atmospheric trends across thousands of worlds. Researchers will be able to compare temperatures, climate patterns, and other atmospheric characteristics on a scale that has never been possible before.<\/p>\n

The telescope\u2019s infrared instruments will be particularly useful for studying so-called hot Jupiters. These giant planets are similar in size to Jupiter, which is around 11 times as wide as Earth, but orbit their stars in just a few days. Their high temperatures cause them to emit detectable infrared radiation.<\/p>\n

When a hot Jupiter passes in front of its star, astronomers observe a dip in brightness. A second, smaller dip occurs when the planet moves behind the star and its own light is temporarily blocked.<\/p>\n

\u201cThat secondary dip tells us how bright, and therefore how hot, the planet is,\u201d said Wilson. \u201cBy tracking how the planet\u2019s brightness changes over its orbit, Roman can also see differences between the day side and night side, and even detect shifts in where the hottest region is on the planet. That tells us about atmospheric winds and heat circulation.\u201d<\/p>\n

\"NASA<\/a>The Nancy Grace Roman Space Telescope is NASA\u2019s upcoming wide-field space observatory that will investigate some of the universe\u2019s biggest mysteries, from dark energy to distant exoplanets. Credit: NASA\u2019s Goddard Space Flight CenterBuilding the Next Exoplanet Revolution<\/p>\n

Astronomers believe Roman could have an impact similar to that of NASA\u2019s Kepler Space Telescope, which transformed exoplanet science more than a decade ago.<\/p>\n

\u201cNASA\u2019s now-retired Kepler mission\u2019s survey of 100,000 stars revolutionized the field of exoplanets over a decade ago, and taught us that planets are even more common than stars in our galaxy,\u201d said Jorge Mart\u00ednez-Palomera, an astronomer at NASA Goddard who is helping prepare for Roman\u2019s exoplanet data. \u201cRoman\u2019s galactic bulge survey will observe around 100 million stars and probe underexplored areas of our galaxy, which will provide a foundational dataset that will likewise revolutionize what we know about other worlds and our place in the universe.\u201d<\/p>\n

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