用“NGC 494”造句大全，NGC 494造句

Observations of the galaxy, NGC 4945, suggest that this hive of stars is a spiral galaxy much like our own, with swirling, luminous arms and a bar-shaped central region.

Other observations have revealed that NGC 4945 has an active galactic nucleus, meaning its central bulge emits far more energy than calmer galaxies like the Milky Way.

Special filters on the telescope isolate the color of light emitted by heated gases such as hydrogen, showing sharp contrasts in NGC 4945 that indicate areas of star formation.