NASA’s Chandra X-ray Observatory has found a brand new type of an otherwise familiar object – compact binary systems that steal gas from other stars, but which do so while emitting very low-energy X-rays but copious amounts of ultraviolet. Chandra spotted 84 suspicious object emitting very low-energy X-rays in six galaxies – four evolved ellipticals and two spirals, namely our near-neighbor the Andromeda Galaxy (M31) and the Pinwheel Galaxy (M101). “We’ve never encountered a group of objects that act like this,” said Mustafa Muhibullah of the University of Alabama in…
Read MoreAPOD: 2026 September 11 – M83: The Southern Pinwheel
APOD Science APOD APOD: 2026 September 11 –… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss APOD Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. M83: The Southern Pinwheel Explanation: Beautiful and bright spiral galaxy M83 lies some twelve million light-years away, near the southeastern tip of the very long constellation Hydra. Prominent spiral arms traced by dark dust lanes and blue star clusters lend this galaxy…
Read MoreNASA Invites Media to Djibouti Artemis Accords Signing Ceremony
Credit: NASA The Republic of Djibouti will sign the Artemis Accords during a ceremony at 11 a.m. EDT, Monday, Sept. 14, at NASA Headquarters in Washington, becoming the 72nd country signatory. NASA Deputy Administrator Matt Anderson will host Ambassador of Djibouti to the United States Mohamed Siad Douale for the ceremony, together with U.S. State Department Assistant Secretary for African Affairs Frank Garcia. This event is in person only. Media interested in attending must RSVP no later than 8 a.m. on Sept. 14 to: hq-media@mail.nasa.gov. NASA’s media accreditation policy is online. In 2020,…
Read MoreNASA Answers President’s Call to Establish United States Space Academy
President Donald Trump presents an executive order establishing the United States Space Academy during an event to award the Congressional Space Medal of Honor to the Artemis II crew as Michael Kratsios, director of the Office of Science and Technology Policy, left; Kevin Hassett, director of the National Economic Council, third from left; and NASA Administrator Jared Isaacman, right, applaud, Friday, Aug. 28, 2026, at NASA’s Johnson Space Center in Houston. Credit: NASA/John Kraus Less than two weeks after an Executive Order was signed to create the first United States…
Read MoreThe Summer Triangle — 3 stars, 1 seasonal mystery
On clear September evenings, I often find myself looking up just after dusk, expecting the sky to feel a little less like summer. Yet there, still commanding the overhead darkness, are Vega, Altair, and Deneb — the three brilliant stars of the famous Summer Triangle. Their familiar pattern can make the season feel as though it is lingering above us, even as cooler nights and earlier sunsets suggest otherwise. In fact, even as late as mid-November, the Triangle is still nearly overhead soon after sunset at dusk. That contrast raises…
Read MoreOn this day in space! Sept. 10, 2011: NASA launches GRAIL probes to the moon to map lumpy lunar gravity
On Sept. 10, 2011, NASA’s GRAIL spacecraft launched on a mission to the moon! GRAIL, which stands for Gravity Recovery and Interior Laboratory, was sent to the moon to map its gravitational fields. Scientists could study the moon’s interior structure by looking at maps of the moon’s gravity. Asteroid impacts from billions of years ago left dense pockets of material under the lunar surface, which can exert extra gravitational pull on spacecraft orbiting the moon. So by measuring that gravitational pull, the GRAIL mission could reveal information about what lies…
Read MoreDust and Water in Sagittarius A*
Using the James Webb Space Telescope, an international team of astronomers have discovered that dust and water can form and survive surprisingly close to the supermassive black hole at the center of our Milky Way galaxy.
Read MoreAPOD: 2026 September 10 – LDN 1295: The Giraffe Nebula
APOD Science APOD APOD: 2026 September 10 –… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss APOD Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. LDN 1295: The Giraffe Nebula Explanation: What does this image look like to you? Many see a giraffe facing right, with neck stretched high and long legs mid-stride (but some may see a squirrel instead). The featured image shows LDN 1295, also called the Giraffe…
Read MoreDust Storm Sweeps Over Mali
Earth Observatory Science Earth Observatory Dust Storm Sweeps Over Mali Earth Earth Observatory Image of the Day EO Explorer Topics All Topics Atmosphere Land Heat & Radiation Life on Earth Human Dimensions Natural Events Oceans Remote Sensing Technology Snow & Ice Water More Content Collections Global Maps World of Change Articles Earth Matters Blog Blue Marble: Next Generation EO Kids Mission: Biomes About About Us Subscribe 🛜 RSS Contact Us Search A dust storm obscures the ground in Mali in this image, acquired with the MODIS (Moderate Resolution Imaging Spectroradiometer) on…
Read MoreThis ‘impossible’ black hole merger may be explained by a warp in spacetime
A “forbidden” merger between two massive black holes may not have been quite as impossible as previously thought. That’s according to new research that suggests the black holes involved were smaller than expected. On Nov. 23, 2023, the gravitational wave detector LIGO (Laser Interferometer Gravitational-Wave Observatory) detected tiny ripples in spacetime caused by the merger of two black holes. What was incredible about this signal, designated GW231123, was that it seemed to be the result of a black hole with 140 times the mass of the sun colliding with another…
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