Gamma Ray Baseball T-Shirts

darkness

and the cat

Metallic Illustration

The artificial moons protected Sedna? How?

GAMMA RAY MERCH VTG

Gamma Ray Stripes

GAMMA RAY BAND

Gamma Ray - Retro Pattern

Gamma Ray Vintage Radio

Gamma Ray Retro Stripes

Gamma Ray Fingerprint

Gamma Ray Vynil Silhouette

Gamma Ray Barbed Wire

Gamma Ray Cassette Stripes

This all-sky view shows how the sky appears at energies greater than 1 billion electron volts (GeV) according to five years of data from NASA's Fermi Gamma-ray Space Telescope. (For comparison, the energy of visible light is between 2 and 3 electron volts.) The image contains 60 months of data from Fermi's Large Area Telescope; for better angular resolution, the map shows only gamma rays converted at the front of the instrument's tracker. Brighter colors indicate brighter gamma-ray sources. The map is shown in galactic coordinates, which places the midplane of our galaxy along the center. "http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=11342":http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=11342

Gamma Ray Exposed Cassette

This cat has smelled our presence as we are locked into its heat signature. Its kitty eyes are fixed in a glare upon us, and who knows what we have awoken!

Gamma Ray Ghouls | Galaxy of Horrors

This design prints best on any background that isn't black. I also have a version that prints great on black. See my store.

Gamma Ray Vintage Cassette

Gamma Ray Vintage Ornament

Gamma Grape Soda, with a ray gun design.

The name Marcus in a green 3D text display that appears to be decaying.

This design prints best on black. I also have an Alt version that prints great on colors. See my store.

This design prints best on black. I also have an Alt version that prints great on colors. See my store.

This design prints best on any background that isn't black. I also have a version that prints great on black. See my store.

Illustration of binary neutron stars about to collide. The aftermath of such a collision, known as a kilonova, was witnessed for the first time in galaxy NGC 4993 on the 17th August 2017. Kilonova are thought to be the origin for all elements heavier than iron in the universe. The merger also produced gravitational waves and gamma rays, both of which were detected by LIGO-Virgo and Fermi/INTEGRAL detectors respectively. Galaxy NGC 4993 is about 130 million light-years from Earth in the constellation Hydra.

Humans have faced existential risks since our species was born. Because we are Earthbound, what happens to Earth happens to us. Josh points out that there’s a lot that can happen to Earth - like gamma ray bursts, supernovae, and runaway greenhouse effect.