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APOD: 2026 September 8 – Hubble: Decagon Around Saturn’s South Pole

2026-09-08 04:05

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.

A dark field has a bright circular disk near the center. Around the center of this disk are bands. One of the bands  appear particularly geometric and appears to have 10 sides. Please see the explanation for more detailed information.

Hubble: Decagon Around Saturn’s South Pole

Explanation: Why are Saturn’s poles geometric? Saturn’s North Pole has been known to be surrounded by a hexagonal (6 sides) cloud since discovery in 1987 in data taken by NASA’s Voyager spacecrafts, which quickly flew past the ringed world in the early 1980s. Now, recent observations of Saturn by the Hubble Space Telescope reveal a slightly different geometric cloud pattern around the South Pole: a decagon (10 sides). The geometric boundaries are possibly caused by waves when the fast-moving gas away from the poles interacts with slower-moving gas closer to the poles. In the featured image composite by the Hubble taken last year, the South Pole of Saturn is marked by an X and surrounded by bands of circulating clouds. The decagon appears most prominent in the dark inner regions. The northern hexagon has proven stable for over 40 years, while the stability of the southern decagon will surely remain a topic of research.

APOD’s main NASA site is moving: From apod.nasa.gov to science.nasa.gov/apod
Tomorrow’s picture: open space

Date September 8, 2026
Credit NASAESASTScIHSTA. Sánchez-Lavega (UPV), A. Simon (NASA-GSFC), M. Wong (UC Berkeley); Processing: A. Pagan (STScI)
Authors & editors: Robert Nemiroff, Jerry Bonnell, Cecilia Chirenti, Keighley Rockcliffe
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.

The Otherworldly Geology of Vasquez Rocks

2026-09-08 04:01




false color
natural color

In this false-color image, areas with more extensive vegetation on the Sierra Pelona retain more moisture than the hills surrounding Agua Dulce, making the Sierra Pelona appear dark green in comparison to the rusty brown coloration of the lower hills. Vasquez Rocks appears as a patch of curved gray stripes near the center of the image.
NASA Earth Observatory/Michala Garrison

This natural-color image shows the same area, but there is less difference in colors between higher-elevation and lower-elevation vegetation. Most features in the image are shades of brown.
NASA Earth Observatory/Michala Garrison

In this false-color image, areas with more extensive vegetation on the Sierra Pelona retain more moisture than the hills surrounding Agua Dulce, making the Sierra Pelona appear dark green in comparison to the rusty brown coloration of the lower hills. Vasquez Rocks appears as a patch of curved gray stripes near the center of the image.
NASA Earth Observatory/Michala Garrison

This natural-color image shows the same area, but there is less difference in colors between higher-elevation and lower-elevation vegetation. Most features in the image are shades of brown.
NASA Earth Observatory/Michala Garrison


false color

natural color


A patchwork of chaparral and sage scrub vegetation shades the hills and mountain ranges surrounding Agua Dulce and Vasquez Rocks in this pair of images captured by the OLI (Operational Land Imager) aboard Landsat 9 on July 28, 2026. The false-color image (bands 6-5-4) on the left incorporates shortwave-infrared and near-infrared observations that accentuate differences in vegetation and soil moisture in comparison to the natural-color image on the right. NASA Earth Observatory images by Michala Garrison.

Editor’s Note: Today’s story is the answer to the September Puzzler.

Several of the outcrops at Vasquez Rocks Natural Area in Southern California jut from the arid landscape of the Soledad Basin at remarkable angles. Geologists estimate that the tilt of sedimentary rock strata found in the area averages 50 degrees, steep enough that many of the otherworldly formations appear to point toward the stars.  

That’s fitting, in some ways, because the rocks have served as one of the Star Trek franchise’s favorite backdrops ever since the show’s inaugural season, when Captain James T. Kirk scrambled up the jagged terrain during an iconic battle with a member of a reptilian alien species.

Viewed from space, the Vasquez Rocks are considerably less dramatic, but they show up clearly as bands of gray nestled between mountain ranges in these false-color (left) and natural-color (right) images captured by the OLI (Operational Land Imager) on Landsat 9. The false-color view (bands 6-5-4) incorporates shortwave-infrared and near-infrared observations that accentuate differences in the landscape’s vegetation in comparison to the natural-color image on the right.

A zoomed-in view of the Vasquez Rocks part of the image highlights a sandy parking lot where Star Trek scenes were filmed, the Antelope Valley Freeway, and the nearby community of Agua Dulce.
Proximity to Los Angeles and the freeway is among the reasons the tilted strata at Vasquez Rocks have long been a popular filming location for television producers. This false-color image (bands 6-5-4) was captured by the OLI (Operational Land Imager) aboard Landsat 9 on July 28, 2026.
NASA Earth Observatory/Michala Garrison

The Vasquez Rocks didn’t start out pointing skyward. When they were forming 25 million years ago, sediment was spread across alluvial fans—cone-shaped deposits that develop as fast-moving streams empty onto relatively flat plains. The sediment likely hadn’t traveled far, much of it eroding from nearby uplands. Over time, the alluvial fan deposits were buried and cemented into thick layers of sandstone and conglomerate rock.

Over millions of years, the region was then reshaped by the interaction of tectonic plates just to the east. Two plates grind past each other along a boundary that includes the San Andreas Fault, a strike-slip fault where the North American plate moves southeast and the Pacific plate northwest, contributing to the powerful tectonic forces that ripple throughout the region.

Eventually this tectonic activity led to the uplift and deformation of the Soledad Basin, with sedimentary layers gradually tilting, folding, and rotating. Once they were exposed at the surface, millions more years of weathering and erosion sculpted the formations further, removing softer material and leaving the more resistant sandstone and conglomerate fins and ridges that wow visitors today.

The rock formations represent far-flung moons and planets in several other Star Trek episodes and Vulcan, Spock’s home planet, in two Star Trek movies. Other productions have highlighted the Vasquez Rocks as well. They make appearances in dozens of other television shows and movies, including the science fiction series Westworld, For All Mankind, and Battlestar Galactica.

NASA Earth Observatory images by Michala Garrison, using Landsat data from the U.S. Geological Survey. Story by Adam Voiland.

References & Resources

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Digging Back in Time in the UAE

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Once below a shallow sea, Jabal al Fāyah now stands above the desert in the United Arab Emirates as a…

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What Lake Bonneville Left Behind

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The drying of the massive lake exposed playas that became the setting for feats of engineering and technological ingenuity, as…

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Pumice Rafts Encroach on Admiralty Islands

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Buoyant volcanic rock fragments from an underwater eruption drifted across the Bismarck Sea and choked island coasts.

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APOD: 2026 September 7 – The Pelican Nebula in Gas, Dust, and Stars

2026-09-07 04:05

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.

A busy starfield is dominated by red and blue glowing gas and dark filamentary dust. The nebula appears to some to have the shape of a pelican.

The Pelican Nebula in Gas, Dust, and Stars

Explanation: The Pelican Nebula is slowly being transformed. IC 5070 (an official designation) is divided from the larger North America Nebula by a molecular cloud filled with dark dust. The deep featured picture from UtahUSA incorporates 25 hours of exposure and brings out great details of this filamentary dust. The Pelican Nebula receives much study because it is a particularly active mix of star formation and evolving gas clouds. The light from young energetic stars is slowly transforming the cold gas to hot gas, with the advancing boundary between the two, known as an ionization front, visible in bright orange on the upper right. Particularly dense tentacles of cold gas remain. Millions of years from now, the Pelican Nebula, bounded by dark nebula LDN 935, might no longer be known as the Pelican, as the balance and placement of stars and gas will surely leave something that appears completely different.

APOD’s main site is moving: From apod.nasa.gov to science.nasa.gov/apod
Tomorrow’s picture: geometric Saturn

Date: September 7, 2026
Credit & Copyright: Mark Killion
Authors & editors: Robert Nemiroff, Jerry Bonnell, Cecilia Chirenti, Keighley Rockcliffe
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.

A Bright Spot at Mount Michael

2026-09-07 04:01

A small ice- and snow-covered island with an active volcanic crater at its center is surrounded by drifting pieces of sea ice. A thermal signal and small plume appear in the crater, and ash darkens the snow on the volcano’s northern slopes.
Mount Michael on Saunders Island, seen in this image acquired with the OLI (Operational Land Imager) on Landsat 8 on August 24, 2026, hosts a frequently active lava lake in its summit crater.
NASA Earth Observatory/Michala Garrison

Winter near the Antarctic Circle brings months of frozen darkness, when sea ice chokes ocean waters and many of its denizens hunker down to ride out the harsh conditions. But as winter began to release its icy grip, an uncommonly clear satellite image revealed that part of this remote realm was still very much awake, at least volcanically speaking.

Mount Michael, the stratovolcano at the center of Saunders Island, rises above the ice-filled South Atlantic Ocean in this image, acquired with the OLI (Operational Land Imager) on the NASA-USGS Landsat 8 satellite on August 24, 2026. The natural-color image is overlaid with an infrared signal (OLI bands 7-6-5), shown in red, revealing heat from the persistent lava lake in its summit crater. A puff of a volcanic plume hovering over the peak, along with darkened snow on its northern slopes, also suggests ongoing activity.

Saunders Island is one of the South Sandwich Islands, a string of small volcanic peaks about 350 kilometers (220 miles) long that formed from the South American plate subducting beneath the tiny South Sandwich plate. Regular eruptions, including at Mount Michael, have occurred on these islands in recent centuries.

Because of the volcanoes’ remoteness, scientists rely on satellite data to understand their activity. An analysis of thermal anomalies in Landsat, Sentinel, and ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) observations spanning 30 years led researchers to conclude that Mount Michael hosts a persistent lava lake in its summit crater. Only a handful of other volcanoes on Earth, including Kīlauea, Nyamulagira, and Erta Ale, are known to have similar, frequently active features.

Thermal observations from the MODIS (Moderate Resolution Imaging Spectroradiometer) and VIIRS (Visible Infrared Imaging Radiometer Suite) instruments have also enabled long-term monitoring of Mount Michael. Data provided through MIROVA, a near-real-time volcanic hot spot detection system, indicate that low-intensity activity has been ongoing at the volcano for the past several years. Other observations from NASA’s Aura satellite show that emissions of sulfur dioxide and other gases are common at Mount Michael.

A series of V-shaped wave clouds appears over an ocean filled with pieces of sea ice.
Wave clouds form downwind of Saunders Island in this image acquired with the OLI (Operational Land Imager) on Landsat 9 on September 1, 2026.
NASA Earth Observatory/Michala Garrison

The cloud-free window over Mount Michael would close in short order. One week later, when Landsat 9 passed over the island, a more active atmosphere had returned. But the weather patterns interacted with the island to put on a spectacle of their own. The 843-meter-high (2,766-foot-high) peak jutting from the ocean disturbed passing winds to produce a series of wave clouds resembling the wake of a ship, a familiar phenomenon in this region. False-color imagery captured by NASA’s Aqua satellite indicates that a volcanic track caused by degassing sulfur dioxide was likely present as well.

NASA Earth Observatory images by Michala Garrison, using Landsat data from the U.S. Geological Survey. Story by Lindsey Doermann.

References & Resources

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Stay up-to-date with the latest content from NASA as we explore the universe and discover more about our home planet.

Ever Restless Mount Dukono Erupts

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The volcano on Indonesia’s Halmahera Island routinely ejects ash, volcanic gases, and volcanic bombs.

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Icy, isolated Peter I Island stirred up a show in the atmosphere off the West Antarctic coast.

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Beaver Island is one in a string of verdant and scenic jewels in a northern Lake Michigan archipelago.

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APOD: 2026 September 5 – Chasing the Moon’s Shadow

2026-09-05 04:05

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.

A solar eclipse as viewed by a pilot from an aircraft cockpit.

Chasing the Moon’s Shadow

Explanation: Chasing the shadow of a New Moon, NASA’s WB-57F high altitude research aircraft took to the skies off the coast of Iceland on August 12 to observe a total solar eclipse. At 50,000 feet the aircraft was piloted along the precisely determined path of totality to maximize its time in the Moon’s shadow. A suite of high-resolution cameras on board was able to record eclipse data from above the clouds, dust, and atmospheric water vapor that interfere with observations made closer to the ground. This view from the cockpit, taken from an inflight video, captures the solar corona emerging at the beginning of totality. The sky appears dark in the shadow of the Moon. Venus is shining left of center in the video frame, while Jupiter and Mercury are just visible to the right of the eclipsed Sun. But the sky is bright along the distant horizon below, beyond the reach of the Moon’s shadow.

APOD’s main NASA site is moving: From apod.nasa.gov to science.nasa.gov/apod
Tomorrow’s picture: enhancing Pluto

Date September 5, 2026
Credit: NASA
Authors & editors: Jerry Bonnell, Cecilia Chirenti, Robert Nemiroff, Keighley Rockcliffe
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.

TechCrunch - Latest

Eric Wu’s newest company, out of stealth since May, is going after construction’s labor crunch

2026-09-08 02:16

Eric Wu, who built and ran Opendoor before stepping away in 2022, has had his new company, NavigateAI, out of stealth since May — building AI copilots that give construction workers real-time, hands-free guidance through smartphones and Meta's AI glasses, backed by $25 million from Elad Gil, Khosla Ventures, and Lennar to tackle a labor shortage severe enough that data center projects alone now need 4,000 to 5,000 workers apiece.
Opaque recurrence, and other AI terms that you should probably know

2026-09-07 19:24

The rise of AI has brought an avalanche of new terms and slang. Here is a glossary with definitions of some of the most important words and phrases you might encounter.
A secret new Elizabeth Holmes documentary stuns Telluride

2026-09-07 18:02

Nathan Fielder and Lance Oppenheim's secret Elizabeth Holmes documentary, "You Can See Everything," stunned Telluride audiences Sunday night with its generous access to the Theranos founder.
What we expect from the upcoming Apple launch

2026-09-07 15:58

While Apple's first foldable iPhone Ultra will headline the September 9 launch, we're also expecting news about AirPods and HomePods.
Phil Schiller’s App Store exit reportedly driven by wariness over future plans

2026-09-06 21:41

Schiller reportedly had reservations about new CEO John Ternus' goal of bringing in more recurring revenue from the App Store.
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