The space of night is infinite,
The blackness and emptiness
Crossed only by thin bright fences
Of logic

— Kenneth Rexroth
"Theory of Numbers"

NASA Image of the Day

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The latest NASA "Image of the Day" image.
Updated: 23 hours 46 min ago

Milky Way Views

Thu, 09/18/2025 - 12:14pm
The Milky Way appears above Earth's bright atmospheric glow in this photograph from the International Space Station as it soared 261 miles above southern Iran at approximately 12:54 a.m. local time on Aug. 23, 2025.
Categories: Astronomy, NASA

Space Station Science

Wed, 09/17/2025 - 11:36am
NASA astronaut Zena Cardman processes bone cell samples inside the Kibo laboratory module's Life Science Glovebox on Aug. 28, 2025.
Categories: Astronomy, NASA

An Eye-catching Star Cluster

Tue, 09/16/2025 - 12:41pm
Westerlund 1 is the biggest and closest “super” star cluster to Earth. Data from Chandra and other telescopes are helping astronomers delve deeper into this galactic factory where stars are vigorously being produced. Observations from Chandra have uncovered thousands of individual stars pumping out X-ray emission into the cluster.
Categories: Astronomy, NASA

Helicopter Training for Artemis Missions

Mon, 09/15/2025 - 12:35pm
NASA astronauts Matthew Dominick (left) and Mark Vande Hei (right) prepare to fly out to a landing zone in the Rocky Mountains as part of the certification run for the NASA Artemis course at the High-Altitude Army National Guard Aviation Training Site in Gypsum, Colorado, Aug. 26.
Categories: Astronomy, NASA

A Brief Outburst

Fri, 09/12/2025 - 11:37am
The Sun blew out a coronal mass ejection along with part of a solar filament over a three-hour period on Feb. 24, 2015. While some of the strands fell back into the Sun, a substantial part raced into space in a bright cloud of particles (as observed by the NASA-ESA Solar and Heliospheric Observatory spacecraft). Because this occurred way over near the edge of the Sun, it was unlikely to have any effect on Earth.
Categories: Astronomy, NASA

Shining Pismis 24

Thu, 09/11/2025 - 2:01pm
NASA's James Webb Space Telescope captured newborn stars forming in clouds of dust and gas (colored golden and orange in this image) in a star-forming region called Pismis 24.
Categories: Astronomy, NASA

Dinner is Served!

Wed, 09/10/2025 - 11:04am
Dinner is served aboard the International Space Station! One tray features shrimp cocktail on whole grain wheat crackers, while the other holds sushi made with seaweed, Spam, tuna, and rice.
Categories: Astronomy, NASA

Artemis II Crew Walks Out for Practice Scenarios

Tue, 09/09/2025 - 11:44am
From left to right, NASA astronauts Victor Glover, Artemis II pilot; Reid Wiseman, Artemis II commander; CSA (Canadian Space Agency) astronaut Jeremy Hansen, Artemis II mission specialist, and NASA astronaut Christina Koch, Artemis II mission specialist, suit up and walk out of the Neil A. Armstrong Operations and Checkout Building at NASA’s Kennedy Space Center in Florida on Monday, Aug. 11, 2025. During a two-day operation, the Artemis II team practiced night-run demonstrations of different launch day scenarios for the Artemis II test flight.
Categories: Astronomy, NASA

NASA Astronaut Frank Rubio in Space Station Cupola

Mon, 09/08/2025 - 12:30pm
NASA astronaut and Expedition 68 Flight Engineer Frank Rubio is pictured inside the cupola, the International Space Station's "window to the world," as the orbiting lab flew 263 miles above southeastern England on Oct. 1, 2022.
Categories: Astronomy, NASA

Orion Mission Evaluation Room

Fri, 09/05/2025 - 11:22am
Orion Mission Evaluation Room (MER) team member works during an Artemis II mission simulation on Aug. 19, 2025, from the new Orion MER inside the Mission Control Center at NASA’s Johnson Space Center in Houston.
Categories: Astronomy, NASA

NASA astronauts Jonny Kim and Zena Cardman pose for a portrait in the Unity module

Thu, 09/04/2025 - 10:59am
NASA astronauts Jonny Kim and Zena Cardman, both Expedition 73 Flight Engineers, pose for a portrait inside the International Space Station's Unity module during a break in weekend housecleaning and maintenance activities. Kim and Cardman are both part of NASA Astronaut Group 22 selected in June 2017 with 12 other astronauts, including two Canadian Space Agency astronauts, and affectionately nicknamed "The Turtles."
Categories: Astronomy, NASA

Thinning Arctic Sea Ice

Wed, 09/03/2025 - 11:19am
Sea ice is frozen seawater that floats in the ocean. This photo, taken from NASA’s Gulfstream V Research Aircraft on July 21, 2022, shows Arctic sea ice in the Lincoln Sea north of Greenland.
Categories: Astronomy, NASA

Circular Star Trails

Tue, 09/02/2025 - 10:22am
This long-exposure photograph, taken over 31 minutes from a window inside the International Space Station’s Kibo laboratory module, captures the graceful arcs of star trails.
Categories: Astronomy, NASA

Landsat 9 Sees Buccaneer Archipelago

Fri, 08/29/2025 - 11:09am
In the sparsely populated Kimberley region of Western Australia, jagged landforms reach like fingers into the turquoise-blue ocean waters. Along the coastline north of Derby, they used to reach even farther. But rising sea levels submerged part of the coastal landscape, giving rise to hundreds of islands and low-lying reefs that compose the Buccaneer Archipelago.
Categories: Astronomy, NASA

Portrait of an Astronaut

Thu, 08/28/2025 - 3:45pm
NASA astronaut Zena Cardman poses for a portrait in a photography studio at NASA’s Johnson Space Center in Houston, Texas.
Categories: Astronomy, NASA

NASA’s X-59 at Sunrise

Mon, 08/25/2025 - 11:51am
NASA’s X-59 quiet supersonic research aircraft sits on the ramp at sunrise before ground tests at Lockheed Martin’s Skunk Works facility in Palmdale, California, on July 18, 2025. The X-59 is the centerpiece of NASA’s Quesst mission to demonstrate quiet supersonic flight.
Categories: Astronomy, NASA

Epic Research Can Help Mars Missions

Fri, 08/22/2025 - 10:48am
The parachute of the Enhancing Parachutes by Instrumenting the Canopy test experiment deploys following an air launch from an Alta X drone on June 4, 2025, at NASA’s Armstrong Flight Research Center in Edwards, California.
Categories: Astronomy, NASA