Who are we? We find that we live on an insignificant planet of a humdrum star lost in a galaxy tucked away in some forgotten corner of a universe in which there are far more galaxies than people

— Carl Sagan

NASA Image of the Day

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The latest NASA "Image of the Day" image.
Updated: 12 hours 52 min ago

Celebrating National Park Week With a View of Mount Rainier

Wed, 04/25/2018 - 3:36pm
NASA astronaut Ricky Arnold captured this clear view of Mount Rainier National Park as the International Space Station orbited above, sharing the image with his followers on April 25 to celebrate National Park Week.
Categories: Astronomy, NASA

Behold the Northern Lights

Tue, 04/24/2018 - 10:36am
As our nearest star, the Sun bathes Earth in a steady stream of energetic particles, magnetic fields and radiation that can stimulate our atmosphere and light up the night sky, like the aurora borealis, or northern lights.
Categories: Astronomy, NASA

Gravity’s Rainbow

Mon, 04/23/2018 - 10:30am
Saturn’s rings display their subtle colors in this view captured on Aug. 22, 2009, by NASA’s Cassini spacecraft.
Categories: Astronomy, NASA

The Galápagos Islands

Fri, 04/20/2018 - 12:04pm
"The Enchanted Islands of #Ecuador – the Galápagos," were photographed by NASA astronaut Ricky Arnold from aboard the International Space Station.
Categories: Astronomy, NASA

Celebrating 28 Years of the Hubble Space Telescope

Thu, 04/19/2018 - 11:07am
This colorful image, taken by NASA’s Hubble Space Telescope, celebrates the Earth-orbiting observatory’s 28th anniversary of viewing the heavens, giving us a window seat to the universe’s extraordinary stellar tapestry of birth and destruction.
Categories: Astronomy, NASA

Sounding Rocket Launches CHESS Mission to Study the Matter Between Stars

Tue, 04/17/2018 - 11:16am
The Colorado High-resolution Echelle Stellar Spectrograph, or CHESS 4, was successfully launched on a NASA Black Brant IX sounding rocket at 12:47 p.m. EDT, April 16 (4:47 a.m. local, April 17) from the Kwajalein Atoll in The Republic of the Marshall Islands.
Categories: Astronomy, NASA

Seasons of Snow Cover in the West

Mon, 04/16/2018 - 4:21pm
Astronauts aboard the International Space Station captured this photo while flying over the western United States. The wide field of view stretches from the Sierra Nevada of California to the Columbia Plateau of Oregon and the Snake River Valley of Idaho. Lake Tahoe is nestled on the border of California and Nevada.
Categories: Astronomy, NASA

NASA's TESS Mission Hopes to Find Exoplanets Beyond Our Solar System

Fri, 04/13/2018 - 1:56pm
The worlds orbiting other stars are called “exoplanets,” and they come in a wide variety of sizes, from gas giants larger than Jupiter to small, rocky planets about as big around as Earth or Mars. This rocky super-Earth is an illustration of the type of planets future telescopes, like NASA's TESS, hope to find outside our solar system.
Categories: Astronomy, NASA

The Aurora and the Sunrise

Wed, 04/11/2018 - 10:35am
Auroras are one of the many Earthly phenomena the crew of the International Space Station observe from their perch high above the planet.
Categories: Astronomy, NASA

Our Sun: Three Different Wavelengths

Tue, 04/10/2018 - 10:01am
From March 20-23, 2018, the Solar Dynamics Observatory captured a series of images of our Sun and then ran together three sequences in three different extreme ultraviolet wavelengths.
Categories: Astronomy, NASA

We Were There: 2018 USA Science and Engineering Festival

Mon, 04/09/2018 - 10:05am
Attendees talk with NASA staff at exhibit booths during Sneak Peek Friday at the USA Science and Engineering Festival, Friday, April 6, 2018. At the festival, NASA showcased the future of human space exploration – including the Orion spacecraft and the Space Launch System rocket.
Categories: Astronomy, NASA

Hubble Finds an Einstein Ring

Fri, 04/06/2018 - 9:34am
These graceful arcs are a cosmic phenomenon known as an Einstein ring - created as the light from distant galaxies warps around an extremely large mass, like a galaxy cluster.
Categories: Astronomy, NASA

Gullies of Matara Crater

Thu, 04/05/2018 - 9:28am
Gullies on Martian sand dunes, like these in Matara Crater, have been very active, with many flows in the last ten years.
Categories: Astronomy, NASA

Memphis From Space

Wed, 04/04/2018 - 11:03am
We honor the legacy of Dr. Martin Luther King Jr., who delivered the famous "I've been to the mountaintop" speech in Memphis, Tennessee fifty years ago, the day before he was assassinated on April 4, 1968. This image taken from the International Space Station shows a detailed view of the city of Memphis from low-Earth orbit.
Categories: Astronomy, NASA

Transforming Aviation

Tue, 04/03/2018 - 10:01am
Aeronautical innovations are part of a government-industry partnership to collect data that could make supersonic flight over land possible, dramatically reducing travel time in the United States.
Categories: Astronomy, NASA

Hangout in Space

Mon, 04/02/2018 - 10:46am
NASA astronaut Drew Feustel seemingly hangs off the International Space Station while conducting a spacewalk on March 29, 2018.
Categories: Astronomy, NASA

Technology Then and Now

Fri, 03/30/2018 - 10:49am
Before there were computers and software that could stitch together digital images, they were printed on photo paper, trimmed by hand, and taped in place on a large black board.
Categories: Astronomy, NASA

Getting InSight on the Interior of Mars

Thu, 03/29/2018 - 10:33am
Inside the Astrotech processing facility at Vandenberg Air Force Base, NASA's Interior Exploration using Seismic Investigations, Geodesy and Heat Transport, or InSight, Mars lander is tested ahead of its scheduled launch on May 5, 2018.
Categories: Astronomy, NASA