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Nearby spiral galaxy, Messier 106. The supermassive black hole at its center produces two extra spiral arms, shown in green, composed of hot gas.

(ESA/Webb, NASA & CSA, J. Glenn)
February 15, 2026 at 12:50 AM
The Double Helix Nebula, located only 300 light-years from the supermassive black hole at the center of the Milky Way. Incredibly strong and twisted magnetic fields in this region of the galaxy give the nebula its unique geometry.

(NASA/JPL-Caltech/M. Morris, UCLA)
February 14, 2026 at 8:50 PM
Dwarf planet Eris situated near Pluto in the Kuiper Belt. Discovered in 2005, its atmosphere freezes into snow when it is farther from the Sun and thaws when it gets closer. Eris is slightly smaller than Pluto, but more massive.

(Southwest Research Institute)
February 14, 2026 at 2:33 PM
An interacting pair of galaxies known as IC 1623. As the galaxies merge, intense star formation is triggered which is accompanied by bright outbursts of radiation.
(X-ray: NASA/CXC/SAO; IR: NASA/ESA/CSA/STScI; Image Processing: NASA/CXC/SAO/L. Frattare and J. Major)
February 14, 2026 at 10:30 AM
Photo of Pluto’s surface taken by the New Horizons spacecraft in 2015. Evidence can be seen for a cryovolcano, a type of volcano that spews out icy water, methane, or ammonia instead of molten rock.
(NASA / Johns Hopkins University Applied Physics Laboratory / Southwest Research Institute)
February 14, 2026 at 8:32 AM
The Red Spider Nebula viewed through the James Webb Space Telescope. It was produced by a star like our Sun reaching the end of its life and shedding its outer layers into space. Radiation from the star’s exposed core continues to ionize clouds of outflowing gas.
(NASA/ESA/CSA)
February 14, 2026 at 6:13 AM
Galaxy group VV 166, located 300 million light years away. The arms of the spiral galaxy at the top, NGC 70, are distorted due to tidal interactions with neighboring galaxies.
(International Gemini Observatory/AURA)
February 14, 2026 at 3:07 AM
February 10, 2026 at 10:58 AM
Reposted by Astrophysica
Reposted by Astrophysica
The Pre-socratics
Birth of a Primordial Physics
substack.com
December 24, 2024 at 7:53 AM
Reposted by Astrophysica
Reposted by Astrophysica
Radioactivity
On the rays emitted by phosphorescence (1896)
substack.com
December 31, 2024 at 6:35 AM