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Hubble Telescope Images Gravitational Lenses to Test Dark Matter Theories

Hubble Telescope Images Gravitational Lenses to Test Dark Matter Theories

NASA's Hubble Space Telescope has captured a diverse collection of gravitational lenses, which are being used to test theories about dark matter, specifically the cold dark matter theory. Gravitational lensing occurs when the gravity of a massive foreground object, like a galaxy, bends and magnifies light from a more distant background object. Researchers are using these high-resolution images to detect small imperfections in the lensed galaxy arcs, which could indicate the presence of small clumps of dark matter. The cold dark matter theory predicts the existence of many such clumps, ranging from a million to a billion solar masses. By studying the distortion of these lensed galaxies, astronomers can determine the quantity and distribution of mass in the foreground galaxy, including its invisible dark matter. These observations are also laying the groundwork for follow-up studies by the new Nancy Grace Roman Space Telescope, which launched in August 2026, and will help in building an AI tool for efficient...

Hubble Reveals 'Cat's Tail' Dust Cloud Around Beta Pictoris, Offering Insights into Early Solar Systems

Hubble Reveals 'Cat's Tail' Dust Cloud Around Beta Pictoris, Offering Insights into Early Solar Systems

New observations from the Hubble Space Telescope have provided a clearer picture of the 'Cat's Tail,' a trail of soot-dark dust around the young star Beta Pictoris, located 63 light-years away. The study, led by University of Arizona doctoral student Arin Avsar, indicates that this dust structure lies mostly flat against the sky from Earth's perspective and is composed almost entirely of porous, carbon-rich grains. These grains are believed to have formed from a collision between two Pluto-sized bodies. The Cat's Tail was initially discovered in 2024 by NASA's James Webb Space Telescope, which detected it in mid-infrared light. Hubble's visible-light images, combined with Webb's infrared data and computer modeling, helped reconstruct the tail's three-dimensional arrangement, revealing its flat orientation and fluffy, carbon-rich composition.

NASA's Hubble and Roman Telescopes Collaborate to Study Gravitational Lensing and Dark Matter

NASA's Hubble and Roman Telescopes Collaborate to Study Gravitational Lensing and Dark Matter

NASA's Hubble Space Telescope and the newly launched Nancy Grace Roman Space Telescope are collaborating to study gravitational lensing, a phenomenon where massive objects bend and magnify light from distant galaxies. Hubble has captured a diverse gallery of gravitational lenses, which will serve as targets for follow-up observations by Roman. Gravitational lensing allows astronomers to view objects much farther away and helps in understanding the distribution of mass, including invisible dark matter, in foreground galaxies. While Hubble provides high-resolution views in visible and ultraviolet light, Roman, primarily observing in infrared, offers a much wider field of view, enabling it to capture more lenses. This collaborative approach aims to build a comprehensive picture of the cosmos and test theories about dark matter.

NASA's Chandra X-ray Observatory Identifies Hidden Compact Object Causing Supernova Mimicry in Star AT 2016blu

NASA's Chandra X-ray Observatory Identifies Hidden Compact Object Causing Supernova Mimicry in Star AT 2016blu

Astronomers, utilizing NASA’s Chandra X-ray Observatory, have identified the cause behind the recurring bright outbursts of the massive star AT 2016blu, located in the galaxy NGC 4559. For approximately 15 years, this star has been mimicking supernova explosions, leading scientists to initially mistake its eruptions for actual supernovae. However, AT 2016blu consistently survived these events, earning it the label of a 'supernova imposter.' The recent discovery confirms that a hidden compact object, likely a stellar-mass black hole or a neutron star, is gravitationally pulling material from AT 2016blu. This compact companion orbits the star in an elliptical path with a period of 113 days. During its closest approach, the companion's gravity strips matter from the luminous blue variable star, forming a hot accretion disk around the compact object. This disk then emits powerful X-rays, which heat a previously ejected dense cloud of gas from AT 2016blu, causing it to shine brightly in visible light and create...

NASA Seeks Private Sector Proposals to Extend Hubble Space Telescope's Lifespan

NASA Seeks Private Sector Proposals to Extend Hubble Space Telescope's Lifespan

NASA has issued a formal Request for Information (RFI) to solicit proposals from the private sector for in-space servicing of the Hubble Space Telescope. The telescope, a national icon responsible for groundbreaking discoveries over 30 years, is gradually descending due to atmospheric drag and lacks a propulsion system to adjust its orbit. Without intervention, NASA estimates Hubble will re-enter Earth's atmosphere between 2033 and 2034. The agency is primarily interested in proposals to raise Hubble's altitude to extend its operational lifespan, but is also open to suggestions for managing a safe and controlled reentry or disposal, as well as potential upgrades to enhance its functionality. This initiative follows a non-funding partnership agreement with SpaceX in September 2022 to investigate using a Dragon spacecraft for a similar purpose, though that study was solely to assess commercial feasibility.

Southwest Research Institute Study Explores Ice Giants' Origins Through Argon Isotope Measurements

Southwest Research Institute Study Explores Ice Giants' Origins Through Argon Isotope Measurements

New research led by the Southwest Research Institute (SwRI) and published in The Planetary Science Journal investigates the interior composition and origins of Uranus and Neptune, the solar system's ice giants. The study focuses on measuring atmospheric argon-40 to estimate the amount of rock beneath their surfaces and to uncover clues about their formation. Dr. Olivier Mousis, a planetary scientist at SwRI, led the research, which aimed to distinguish between argon-40 inherited from the protosolar nebula and argon-40 produced by radioactive decay within the planets. The team's simulations suggest that primordial argon from the protosolar nebula is more abundant than previously thought and would largely overshadow any contributions from internal radioactive decay. This indicates that atmospheric argon-40 measurements are more indicative of the planets' formation environments and history rather than their rocky or icy interiors.

Roman Space Telescope Offers 100-Fold Wider Field of View Compared to Hubble

Roman Space Telescope Offers 100-Fold Wider Field of View Compared to Hubble

The Roman Space Telescope, formerly known as WFIRST (Wide Field Infrared Survey Telescope), possesses a field of view that is 100 times greater than that of the Hubble Space Telescope. This significant advancement allows Roman to capture vast areas of the sky in a single observation. For instance, when observing the Pillars of Creation in the Eagle Nebula, Hubble can only focus on the pillars themselves. In contrast, Roman can simultaneously image the pillars along with substantial portions of the surrounding nebula. This capability enables a much broader survey of celestial objects and phenomena, providing a more comprehensive context for detailed observations. The European Space Agency (ESA) has highlighted this comparative advantage, indicating Roman's potential to revolutionize wide-field infrared astronomy.

NASA's Pioneer and Voyager Missions Carry Humanity's First Interstellar Messages

NASA's Pioneer and Voyager Missions Carry Humanity's First Interstellar Messages

NASA's Pioneer 10 and 11 probes, launched in the early 1970s, and the Voyager 1 and 2 probes, launched in 1977, carry humanity's first physical messages into interstellar space. The Pioneer probes are equipped with plaques designed by Carl Sagan and Frank Drake, which depict humanity and Earth's location. The Voyager probes carry Golden Records, also conceived by Sagan and Drake, containing sounds and images representing Earth's diversity of life and culture. These messages are intended for potential extraterrestrial civilizations or future human explorers. The Pioneer plaques are six-by-nine-inch gold-anodized aluminum plates with engraved pictorial messages, while the Voyager Golden Records are 12-inch gold-plated copper disks with encoded images and sounds. These missions marked a significant step in humanity's attempt to communicate beyond Earth and share information about our civilization.

NASA's Pandora Mission Begins Exoplanet Observations with RTX-Supplied Technology

NASA's Pandora Mission Begins Exoplanet Observations with RTX-Supplied Technology

NASA has announced that the Pandora mission has commenced its observations, utilizing technology supplied by RTX. The Pandora spacecraft, integrated and tested at Blue Canyon in Lafayette, Colorado, is designed to differentiate signals from exoplanet atmospheres from changes in their host stars. The mission, which completed its environmental campaign in 2025, combines a 45-centimeter diameter telescope with visible and infrared light observations. This setup allows the science team to separate the contributions of the star and its transiting planet to the measured spectrum. Blue Canyon's platform is crucial for supporting the extended pointing and operational requirements of the observing program. Lawrence Livermore National Laboratory provided project management and engineering, while NASA centers and universities contributed scientific and technical capabilities, linking industrial suppliers with scientific institutions.

SpaceX targets 'Holy Grail of rocketry' with Starship flight 15

SpaceX targets 'Holy Grail of rocketry' with Starship flight 15

SpaceX plans to catch both stages of its Starship rocket in a significant first during the next launch, known as flight 15, in South Texas.

NASA Astrophysicists Detail How LISA Observatory Will Detect New Exoplanets Using Gravitational Waves

NASA Astrophysicists Detail How LISA Observatory Will Detect New Exoplanets Using Gravitational Waves

NASA astrophysicists have published two new studies detailing how the Laser Interferometer Space Antenna (LISA) observatory, currently under development, will detect a unique population of exoplanets throughout our galaxy. LISA is designed to detect gravitational waves, which are tiny ripples in space-time caused by orbiting masses. The primary targets for LISA are expected to be double white dwarf systems, which are binary systems of white dwarfs in tight orbits. If an exoplanet orbits within one of these systems, its presence will imprint a detectable signature on the gravitational wave signal. This method is analogous to the radial velocity method used with light, where a planet's gravitational tug causes its host star to wobble. For gravitational waves, this wobble will manifest as 'sidebands'—secondary signals at higher and lower frequencies than the primary signal, carrying information about the planet's presence. The mission, led by the European Space Agency (ESA) with significant contributions from...