Galaxies

Astrophysics
Galaxies
Goddard Space Flight Center
James Webb Space Telescope (JWST)
Science & Research
Spiral Galaxies
The Universe
Present-day disk galaxies often contain a thick, star-filled outer disk and an embedded thin disk of stars. For instance, our own Milky Way galaxy’s thick disk is approximately 3,000 light-years in height, and its thin disk is roughly 1,000 light-years thick. How and why does this dual disk structure form? By analyzing archival data from […]
Posted June 26, 2025
Andromeda Galaxy
Chandra X-Ray Observatory
Galaxies
Marshall Astrophysics
Marshall Space Flight Center
The Universe
The Andromeda galaxy, also known as Messier 31 (M31), is the closest spiral galaxy to the Milky Way at a distance of about 2.5 million light-years. Astronomers use Andromeda to understand the structure and evolution of our own spiral, which is much harder to do since Earth is embedded inside the Milky Way. The galaxy […]
Posted June 26, 2025
International Space Station (ISS)
Active Galaxies
Astrophysics
Black Holes
Galaxies
Galaxies, Stars, & Black Holes Research
Goddard Space Flight Center
ISS Research
Neutron Stars
NICER (Neutron star Interior Composition Explorer)
Pulsars
Science & Research
Stars
The Universe
June 24, 2025 NASA’s NICER (Neutron star Interior Composition Explorer), an X-ray telescope on the International Space Station, has paused observations due to a problem with one of the motors that drives its ability to track cosmic objects.
Posted June 24, 2025
Astrophysics
Astrophysics Division
Galaxies
Goddard Space Flight Center
Hubble Space Telescope
Irregular Galaxies
The Universe
This portrait from the NASA/ESA Hubble Space Telescope puts the nearby galaxy NGC 4449 in the spotlight. The galaxy is situated just 12.5 million light-years away in the constellation Canes Venatici (the Hunting Dogs). It is a member of the M94 galaxy group, which is near the Local Group of galaxies that the Milky Way […]
Posted June 20, 2025
Nancy Grace Roman Space Telescope
Astrophysics
Dark Matter
Galaxies
Galaxies, Stars, & Black Holes
Galaxies, Stars, & Black Holes Research
The Universe
A funky effect Einstein predicted, known as gravitational lensing — when a foreground galaxy magnifies more distant galaxies behind it — will soon become common when NASA’s Nancy Grace Roman Space Telescope begins science operations in 2027 and produces vast surveys of the cosmos.
Posted June 12, 2025
Astrophysics
Galaxies
Goddard Space Flight Center
James Webb Space Telescope (JWST)
Science & Research
The Universe
Astronomers using data from NASA’s James Webb Space Telescope have identified dozens of small galaxies that played a starring role in a cosmic makeover that transformed the early universe into the one we know today. “When it comes to producing ultraviolet light, these small galaxies punch well above their weight,” said Isak Wold, an assistant […]
Posted June 11, 2025
Galaxies
After capturing an image of the iconic Sombrero galaxy at mid-infrared wavelengths in late 2024, NASA’s James Webb Space Telescope has now followed up with an observation in the near-infrared.
Posted June 6, 2025
Astrophysics
Astrophysics Division
Galaxies
Goddard Space Flight Center
Hubble Space Telescope
Spiral Galaxies
The Universe
A galaxy ablaze with young stars is the subject of this NASA/ESA Hubble Space Telescope image. Named NGC 685, this galaxy is situated about 64 million light-years away in the constellation Eridanus (the River). NGC 685 is a barred spiral because its feathery spiral arms sprout from the ends of a bar of stars at […]
Posted June 6, 2025
Galaxies
Hubble Space Telescope
This NASA/ESA Hubble Space Telescope image features a sparkling cloudscape from one of the Milky Way’s galactic neighbors, a dwarf galaxy called the Large Magellanic Cloud. Located 160,000 light-years away in the constellations Dorado and Mensa, the Large Magellanic Cloud is the largest of the Milky Way’s many small satellite galaxies.
Posted June 5, 2025
Chandra X-Ray Observatory
Galaxies
Galaxy clusters
Marshall Astrophysics
Marshall Space Flight Center
The Universe
New observations from NASA’s Chandra X-ray Observatory and other telescopes have captured a rare cosmic event: two galaxy clusters have collided and are now poised to head back for another swipe at each other. Galaxy clusters are some of the largest structures in the Universe.
Posted June 4, 2025
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