“...all the past is but a beginning of a beginning, and that all that is and has been is but the twilight of dawn.”

— H.G. Wells
1902

NASA Image of the Day

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The latest NASA "Image of the Day" image.
Updated: 8 hours 12 min ago

The Calabash clash

Fri, 12/12/2025 - 10:20am
The Calabash Nebula, pictured here — which has the technical name OH 231.8+04.2 — is a spectacular example of the death of a low-mass star like the Sun. This image taken by the NASA/ESA Hubble Space Telescope shows the star going through a rapid transformation from a red giant to a planetary nebula, during which it blows its outer layers of gas and dust out into the surrounding space. The recently ejected material is spat out in opposite directions with immense speed — the gas shown in yellow is moving close to a million kilometres an hour. Astronomers rarely capture a star in this phase of its evolution because it occurs within the blink of an eye — in astronomical terms. Over the next thousand years the nebula is expected to evolve into a fully fledged planetary nebula. The nebula is also known as the Rotten Egg Nebula because it contains a lot of sulphur, an element that, when combined with other elements, smells like a rotten egg — but luckily, it resides over 5000 light-years away in the constellation of Puppis (The Poop deck).
Categories: Astronomy, NASA

Stellar Jet

Thu, 12/11/2025 - 11:00am
Webb’s image of the enormous stellar jet in Sh2-284 provides evidence that protostellar jets scale with the mass of their parent stars—the more massive the stellar engine driving the plasma, the larger the resulting jet.
Categories: Astronomy, NASA

NASA Astronaut Jonny Kim Returns to Earth

Wed, 12/10/2025 - 11:03am
The Soyuz MS-27 spacecraft is seen as it lands in a remote area near the town of Zhezkazgan, Kazakhstan with Expedition 73 NASA astronaut Jonny Kim, and Roscosmos cosmonauts Sergey Ryzhikov and Alexey Zubritsky aboard, Tuesday, Dec. 9, 2025.
Categories: Astronomy, NASA

Sprites Over Château de Beynac

Tue, 12/09/2025 - 1:24pm
A flash of lightning, and then—something else. High above a storm, a crimson figure blinks in and out of existence. If you see it, you are a lucky witness of a sprite, one of the least-understood electrical phenomena in Earth’s upper atmosphere.
Categories: Astronomy, NASA

XRISM Finds Chlorine, Potassium in Cas A

Mon, 12/08/2025 - 1:08pm
This composite image of the Cassiopeia A (or Cas A) supernova remnant, released Jan. 8, 2024, contains X-rays from Chandra (blue), infrared data from Webb (red, green, blue), and optical data from Hubble (red and white). A study by the XRISM (X-ray Imaging and Spectroscopy Mission) spacecraft has made the first-ever X-ray detections of chlorine and potassium in the wreckage.
Categories: Astronomy, NASA

Testing Drones for Mars in the Mojave Desert

Fri, 12/05/2025 - 11:24am
Researchers from NASA's Jet Propulsion Laboratory in Southern California monitor a research drone in the Dumont Dunes area of the Mojave Desert in September 2025 as part of a test campaign to develop navigation software to guide future rotorcraft on Mars.
Categories: Astronomy, NASA

NASA’s Nancy Grace Roman Space Telescope Completed

Thu, 12/04/2025 - 12:41pm
Over the course of several hours, technicians meticulously connected the inner and outer segments of NASA’s Nancy Grace Roman Space Telescope.
Categories: Astronomy, NASA

Hubble Seeks Clusters in ‘Lost Galaxy’

Wed, 12/03/2025 - 11:18am
This NASA/ESA Hubble Space Telescope image features the spiral galaxy NGC 4535.
Categories: Astronomy, NASA

Waxing Gibbous Moon

Tue, 12/02/2025 - 12:34pm
The waxing gibbous Moon rises above Earth’s blue atmosphere in this photograph taken from the International Space Station as it orbited 263 miles above a cloudy Atlantic Ocean off the coast of Quebec, Canada.
Categories: Astronomy, NASA

Sagittarius B2 Molecular Cloud

Mon, 12/01/2025 - 12:45pm
NASA's James Webb Space Telescope took a look at the Sagittarius B2 molecular cloud, the most massive, and active star-forming region in our galaxy, located only a few hundred light years from our central supermassive black hole.
Categories: Astronomy, NASA

Newly Found Organics in Enceladus’ Plumes

Fri, 11/28/2025 - 1:13pm
NASA's Cassini spacecraft captured dramatic plumes, both large and small, spray water ice out from many locations along the famed 'tiger stripes' near the south pole of Saturn's moon Enceladus.
Categories: Astronomy, NASA

Artemis II Orion Spacecraft Stacked

Wed, 11/26/2025 - 12:42pm
NASA’s Artemis II Orion spacecraft with its launch abort system is stacked atop the agency’s SLS (Space Launch System) rocket in High Bay 3 of the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida on Monday, Oct. 20, 2025. The spacecraft will carry NASA astronauts Reid Wiseman, Victor Glover, Christina Koch, and CSA (Canadian Space Agency) astronaut Jeremy Hansen on a 10-day mission around the Moon and back in early 2026.
Categories: Astronomy, NASA

Red Spider Nebula

Tue, 11/25/2025 - 1:10pm
Using its Near-InfraRed Camera (NIRCam), NASA's James Webb Space Telescope has revealed never-before-seen details in the picturesque Red Spider Nebula with a rich backdrop of thousands of stars.
Categories: Astronomy, NASA

City Lights and Atmospheric Glow

Mon, 11/24/2025 - 12:13pm
The atmospheric glow blankets southern Europe and the northwestern Mediterranean coast, outlined by city lights. At left, the Po Valley urban corridor in Italy shines with the metropolitan areas of Milan and Turin and their surrounding suburbs.
Categories: Astronomy, NASA

Hubble Captures Puzzling Galaxy

Fri, 11/21/2025 - 12:29pm
This NASA/ESA Hubble Space Telescope image features a galaxy, NGC 2775, that’s hard to categorize.
Categories: Astronomy, NASA

NASA’s Quesst Mission Marks X-59’s Historic First Flight

Thu, 11/20/2025 - 5:13pm
NASA’s X-59 quiet supersonic research aircraft lifts off for its first flight Tuesday, Oct. 28, 2025, from U.S. Air Force Plant 42 in Palmdale, California. The aircraft’s first flight marks the start of flight testing for NASA’s Quesst mission, the result of years of design, integration, and ground testing and begins a new chapter in NASA’s aeronautics research legacy.
Categories: Astronomy, NASA

NASA Telescopes View Spiral Galaxy

Tue, 11/18/2025 - 12:46pm
NGC 1068, a relatively nearby spiral galaxy, appears in this image released on July 23, 2025.
Categories: Astronomy, NASA

Suited Up for Science: NASA ER-2 Pilot Prepares for GEMx Flight

Mon, 11/17/2025 - 3:35pm
NASA ER-2 pilot Kirt Stallings waits inside the transport vehicle at Edwards, California, on Thursday, Aug. 21, 2025, moments before boarding NASA’s Armstrong Flight Research Center’s ER-2 aircraft for a high-altitude mission supporting the Geological Earth Mapping Experiment (GEMx). Through the vehicle window, the aircraft can be seen being readied for flight.
Categories: Astronomy, NASA