"Time and space are modes in which we think and not conditions in which we live."

— Albert Einstein

NASA Image of the Day

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The latest NASA "Image of the Day" image.
Updated: 15 hours 25 min ago

Curiosity Sends Holiday Postcard from Mars

Tue, 12/30/2025 - 1:21pm
NASA’s Curiosity Mars rover used its black-and-white navigation cameras to capture panoramas at two times of day on Nov. 18, 2025, spanning periods that occurred on both the 4,722nd and 4,723rd Martian days, or sols, of the mission. The panoramas were captured at 4:15 p.m. on Sol 4,722 and 8:20 a.m. on Sol 4,723 (both at local Mars time), then merged together. Color was later added for an artistic interpretation of the scene with blue representing the morning panorama and yellow representing the afternoon one.
Categories: Astronomy, NASA

A Galactic Embrace

Mon, 12/29/2025 - 11:43am
Data from NASA’s James Webb Space Telescope and Chandra X-ray Observatory come together in this eye-catching photo of colliding spiral galaxies released on Dec. 1, 2025.
Categories: Astronomy, NASA

Studying Physics in Microgravity

Fri, 12/26/2025 - 11:29am
Tiny ball bearings surround a larger central bearing during the Fluid Particles experiment, conducted inside the Microgravity Science Glovebox (MSG) aboard the International Space Station’s Destiny laboratory module.
Categories: Astronomy, NASA

Santa Visits Artemis II Rocket

Wed, 12/24/2025 - 9:00am
NASA engineer Guy Naylor poses for a photograph wearing a custom Santa Claus suit on the 19th level of High Bay 4 inside the Vehicle Assembly Building with NASA's integrated Moon rocket behind him at the agency’s Kennedy Space Center in Florida on Thursday, Dec. 11, 2025.
Categories: Astronomy, NASA

Artemis II Crew Launch Day Rehearsal

Tue, 12/23/2025 - 11:20am
From left to right, CSA (Canadian Space Agency) astronaut Jeremy Hansen and NASA astronauts Christina Koch, Victor Glover, and Reid Wiseman are seen as they depart the Neil A. Armstrong Operations and Checkout Building to board their Orion spacecraft atop NASA’s Space Launch System rocket inside the Vehicle Assembly Building as part of the Artemis II countdown demonstration test, Saturday, Dec. 20, 2025, at NASA’s Kennedy Space Center in Florida.
Categories: Astronomy, NASA

A Dance of Galaxies

Mon, 12/22/2025 - 11:27am
These two galaxies are named NGC 4490 and NGC 4485, and they’re located about 24 million light-years away in the constellation Canes Venatici (The Hunting Dogs). They are the closest known interacting dwarf-dwarf galaxy system where astronomers have observed the interactions between them, as well as been able to resolve the stars within.
Categories: Astronomy, NASA

Water Droplet Science

Fri, 12/19/2025 - 12:44pm
NASA astronaut Don Pettit demonstrates electrostatic forces using charged water droplets and a knitting needle made of Teflon.
Categories: Astronomy, NASA

NASA Lab Completes Engine Checks on New Aircraft

Thu, 12/18/2025 - 2:27pm
Justin Hall, left, controls a subscale aircraft as Justin Link holds the aircraft in place during preliminary engine tests on Friday, Sept. 12, 2025, at NASA’s Armstong Flight Research Center in Edwards, California. Hall is chief pilot at the center’s Dale Reed Subscale Flight Research Laboratory and Link is a pilot for small uncrewed aircraft systems.
Categories: Astronomy, NASA

Massive Stars Make Their Mark in Hubble Image

Wed, 12/17/2025 - 12:43pm
This NASA/ESA Hubble Space Telescope image features the blue dwarf galaxy Markarian 178 (Mrk 178) against a backdrop of distant galaxies in all shapes and sizes. Some of these distant galaxies even shine through the diffuse edges of Mrk 178.
Categories: Astronomy, NASA

Peekaboo!

Tue, 12/16/2025 - 12:31pm
Clockwise from left, JAXA (Japan Aerospace Exploration Agency) astronaut Kimiya Yui and NASA astronauts Jonny Kim, Zena Cardman, and Mike Fincke pose for a playful portrait through a circular opening in a hatch thermal cover aboard the International Space Station on Sept. 18, 2025.
Categories: Astronomy, NASA

Bassac River, Southern Vietnam

Mon, 12/15/2025 - 12:30pm
The Bassac River surrounds Cù Lao Dung, a river islet district in southern Vietnam, before emptying into the South China Sea.
Categories: Astronomy, NASA

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