gradient

It forms a gradient to the closest minimum.

redshift

The redshift of the galaxy cluster is quite high.

background

eg. The background galaxies, instrumental background, astrophysical background, background signal

Dark Matter

The gas traces the dark matter separation from the galaxy.

Cluster

eg. Galaxy cluster, a cluster of galaxies

antenna

organs found in pairs on the heads of common Terran insects, used for feeling, sensing.

cicada

an insect with transparent wings, the male singing in summer, is feature of the season in Earth.

nebula

Luminescent parts of the interstellar medium often consisting of ionized hydrogen and cosmic dust, which serve as star-forming regions. Perhaps something like a {logh 'eng}.…